Multi-level multi-panel cooperative mine air volume control method and system

Abstract

The invention discloses a multi-level multi-panel cooperative mine air volume control method and system. The method comprises the steps that mine ventilation system information of a multi-level multi-panel cooperative mine is obtained; according to the mine ventilation system information, the air volume required by the target stope is calculated; according to the mine ventilation system information, the air volume required by a target tunneling working face is calculated, and the air volume required by the target tunneling working face comprises the air volume required by the tunneling working face in the panel or the air volume required by the independent tunneling working face; according to the target stope needed air volume and the target tunneling working face needed air volume, target needed air volume is calculated; calculating the target fan operation frequency according to the whole mine air demand; and air volume control is conducted according to the target needed air volume and the target fan operation frequency. Mine air volume control is achieved, and accuracy is improved. The method can be widely applied to the technical field of mine engineering.

Description

Technical Field

[0001] The present invention relates to the field of mine engineering technology, and in particular to a multi-level and multi-pan area coordinated mine air volume control method and system. Background Art

[0002] Multi-level and multi-panel coordinated mining refers to the coordinated operation of multiple levels and multiple panels within an underground mine production system to jointly achieve the mine production goals. The multi-level and multi-panel coordinated mining operation faces are numerous and scattered. The required air volume of the operation face changes with the change of the operation status, and is affected by the main fan wind pressure and natural wind pressure. At present, traditional air volume control realizes air volume control by manually controlling the state of ventilation structures (damper, wind window, etc.), but the control personnel's judgment on the required air volume of the operation face is inaccurate, and it is difficult to supply air on demand, which easily causes insufficient or excessive air volume in the mine area, and the air volume control accuracy is low.

[0003] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the invention

[0004] The embodiment of the present invention provides a multi-level and multi-panel coordinated mine air volume control method and system, which effectively improves the accuracy.

[0005] On the one hand, an embodiment of the present invention provides a multi-level multi-panel coordinated mine air volume control method, comprising the following steps:

[0006] Acquire mine ventilation system information of a multi-level multi-pan coordinated mine, wherein the multi-level multi-pan coordinated mine includes a ventilation network, ventilation power equipment, and ventilation control equipment, and the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters, or fan operation information;

[0007] Calculate the required air volume of the target mining area according to the mine ventilation system information;

[0008] Calculate the required air volume of the target excavation working face according to the mine ventilation system information, wherein the required air volume of the target excavation working face includes the required air volume of the excavation working face within the panel area or the required air volume of the independent excavation working face;

[0009] Calculate the target air volume requirement according to the target stope air volume requirement and the target excavation working face air volume requirement, wherein the target air volume requirement includes the panel air volume requirement, the horizontal working face air volume requirement or the whole mine air volume requirement;

[0010] Calculate the target fan operating frequency based on the total mine air volume requirement;

[0011] The air volume is controlled according to the target required air volume and the target fan operating frequency.

[0012] In some embodiments, the calculating the required air volume of the target stope according to the mine ventilation system information includes:

[0013] Determine the stope operation status and stope type according to the mine ventilation system information;

[0014] When the working state of the mining site is rock drilling, mechanical rock breaking, mining, support or filling, the required air volume of the target mining site is calculated according to the minimum required air volume per person per minute, the number of workers on the working face, the wind cross-sectional area of ​​the mining site, the dust exhaust wind speed of the mining site, the air volume index per unit power and the total operating power of the diesel equipment;

[0015] When the stope operation state is blasting and the stope type is tunnel type, the required air volume of the target stope is calculated according to the ventilation time, the amount of explosives for a single blast, the distance from the center of the blasting smoke position to the return air tunnel, and the cross-sectional area of ​​the stope;

[0016] When the stope operation state is blasting and the stope type is a chamber type, the required air volume of the target stope is calculated according to the ventilation time, the amount of explosives for a single blast, the volume of the stope chamber and the turbulent diffusion coefficient;

[0017] When the stope operation state is suspended, the target stope required air volume is set to 0.

[0018] In some embodiments, the target mine required air volume is calculated based on the minimum air volume required per person per minute, the number of people working on the working face, the wind cross-sectional area of ​​the mine, the dust exhaust wind speed of the mine, the air volume index per unit power and the total operating power of the diesel equipment, including:

[0019] Calculate the breathing air volume required by the workers in the mining area according to the minimum air volume required per person per minute and the number of workers on the working face;

[0020] Calculate the required air volume for dust removal in the mine according to the wind cross-sectional area of ​​the mine and the dust removal wind speed in the mine;

[0021] Calculate the required air volume for exhaust gas removal from the mining area according to the air volume index per unit power and the total operating power of the diesel equipment;

[0022] A maximum value is selected from the first air volume requirements to be selected as the target mine air volume requirement, wherein the first air volume requirements to be selected include the air volume required for breathing of mine workers, the air volume required for dust removal in the mine, and the air volume required for exhaust gas removal in the mine.

[0023] In some embodiments, the calculating the required air volume of the target excavation working face according to the mine ventilation system information includes:

[0024] Determining the operating status of the excavation working face according to the mine ventilation system information;

[0025] When the working state of the tunneling working face is rock drilling, mechanical rock breaking, mining or support, the required air volume for breathing of workers on the tunneling working face, the required air volume for dust removal on the tunneling working face and the required air volume for exhaust gas removal on the tunneling working face are calculated;

[0026] Select a maximum value from the second air volume required to be selected as the target tunneling face air volume required, wherein the second air volume required to be selected includes the air volume required for breathing of workers on the tunneling face, the air volume required for dust removal on the tunneling face, and the air volume required for exhaust gas removal on the tunneling face;

[0027] When the excavation working face is in blasting operation state, the required air volume of the target excavation working face is calculated according to the ventilation time, the tunnel length, the amount of explosives for a single blasting and the tunnel cross-sectional area;

[0028] When the operation state of the excavation working face is suspended operation, the required air volume of the target excavation working face is set to 0.

[0029] In some embodiments, the calculating the target required air volume according to the target stope required air volume and the target excavation working face required air volume includes:

[0030] Calculating the required air volume of the panel area according to the required air volume of the target stope and the required air volume of the excavation working face in the panel area;

[0031] Calculate the required air volume of the horizontal working surface according to the required air volume of the panel area and the required air volume of the independent excavation working surface;

[0032] The air volume requirement for the entire mine is calculated based on the air volume requirements for the multiple horizontal working surfaces.

[0033] In some embodiments, the calculating the target fan operating frequency according to the total mine air volume requirement includes:

[0034] Calculate the density of measuring points along the way according to atmospheric pressure and air temperature;

[0035] According to the density of the measuring points along the way, the height difference between the measuring points along the way and the vertical height difference of the shafts and lanes, the average density of the target shafts and lanes is calculated, and the average density of the target shafts and lanes includes the average density of the air intake shafts and lanes or the average density of the return air shafts and lanes;

[0036] Calculating the natural wind pressure according to the average density of the air intake shaft and lane, the average density of the return air shaft and lane, the gravity acceleration and the vertical height difference of the shaft and lane;

[0037] Calculate the target fan wind pressure according to the natural wind pressure, the wind resistance of the ventilation network, the required air volume of the entire mine, the resistance of the main fan device and the outlet dynamic pressure loss;

[0038] The target fan operating frequency is calculated according to the target fan wind pressure, the current fan wind pressure and the current fan operating frequency.

[0039] In some embodiments, the air volume control according to the target required air volume and the target fan operating frequency includes:

[0040] When the control area is the whole mine area, the air volume of the main fan is controlled according to the required air volume of the whole mine and the target fan operating frequency;

[0041] When the control area is a horizontal working surface, the air volume is controlled by automatically adjusting the damper on the horizontal return air side according to the air volume required by the horizontal working surface;

[0042] When the control area is a panel area, the air volume is controlled by automatically adjusting the damper of the return air lane on the return air side of the panel area according to the required air volume of the panel area;

[0043] When the control area is a tunneling working face, the air volume of the local fan is controlled according to the target required air volume of the tunneling working face.

[0044] In some embodiments, the method further comprises:

[0045] After the air volume is controlled, if the concentration of toxic and harmful substances or oxygen concentration in the control area does not meet the operating requirements, an alarm signal is generated, and the alarm signal is used to control the early warning instrument to alarm.

[0046] In some embodiments, the method further comprises:

[0047] Model the multi-level and multi-panel coordinated mine to obtain a three-dimensional simulation model;

[0048] Inputting the mine climate parameters into the three-dimensional simulation model, and performing three-dimensional ventilation network solution to obtain a ventilation optimization strategy, wherein the ventilation optimization strategy includes a ventilation network optimization strategy, a ventilation power equipment optimization strategy, and a ventilation control equipment optimization strategy;

[0049] According to the ventilation optimization strategy, the mine ventilation system is optimized.

[0050] The beneficial effects of the present invention are as follows:

[0051] The embodiment of the present invention first obtains the mine ventilation system information of a multi-level and multi-pan coordinated mine, and then calculates the target mining area air volume requirement according to the mine ventilation system information, and calculates the target excavation working face air volume requirement according to the mine ventilation system information, and then calculates the target required air volume according to the target mining area air volume requirement and the target excavation working face air volume requirement, and calculates the target fan operating frequency according to the mine-wide air volume requirement, and finally performs air volume control according to the target required air volume and the target fan operating frequency, so that mine air volume control can be achieved through the calculation of the required air volume, thereby improving accuracy.

[0052] On the other hand, an embodiment of the present invention provides a multi-level multi-panel coordinated mine air volume control system, comprising:

[0053] A mine ventilation system information acquisition module, the mine ventilation system information acquisition module is used to obtain mine ventilation system information of a multi-level multi-pan area coordinated mine, the multi-level multi-pan area coordinated mine includes a ventilation network, ventilation power equipment and ventilation control equipment, the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters or fan operation information;

[0054] An air volume requirement calculation module, the air volume requirement calculation module is used to calculate the target air volume requirement according to the mine ventilation system information, the target air volume requirement includes the air volume requirement of the panel area, the air volume requirement of the horizontal working surface or the air volume requirement of the whole mine;

[0055] A fan operating condition calculation module, the fan operating condition calculation module is used to calculate the target fan operating frequency according to the required air volume of the entire mine;

[0056] An equipment parameter control module, the equipment parameter control module is used to control the air volume according to the target required air volume and the target fan operating frequency;

[0057] An early warning module, which is used to generate an alarm signal according to the concentration of toxic and harmful substances or oxygen concentration in the control area after the air volume is controlled, and the alarm signal is used to control the early warning instrument to alarm;

[0058] A three-dimensional ventilation network solution module, which is used to establish a three-dimensional simulation model and perform three-dimensional ventilation network solution to obtain a ventilation optimization strategy. The ventilation optimization strategy includes a ventilation network optimization strategy, a ventilation power equipment optimization strategy and a ventilation control equipment optimization strategy. The ventilation optimization strategy is used to optimize the mine ventilation system.

[0059] The beneficial effects of the present invention are as follows:

[0060] A multi-level multi-pan area coordinated mine air volume control system provided by an embodiment of the present invention includes a mine ventilation system information acquisition module, a required air volume calculation module, a fan operating condition calculation module, an equipment parameter control module, an early warning module, and a three-dimensional ventilation network solution module. Among them, the mine ventilation system information acquisition module is used to obtain the mine ventilation system information of the multi-level multi-pan area coordinated mine; the required air volume calculation module is used to calculate the target required air volume; the fan operating condition calculation module is used to calculate the target fan operating frequency; the equipment parameter control module is used to control the air volume according to the target required air volume and the target fan operating frequency; the early warning module is used to generate an alarm signal according to the concentration of toxic and harmful substances or oxygen concentration in the control area to alarm; the three-dimensional ventilation network solution module is used to establish a three-dimensional simulation model and perform a three-dimensional ventilation network solution to optimize the mine ventilation system, so that the mine air volume control can be realized by calculating the required air volume, and safety early warning and mine ventilation system control can be performed, thereby improving the accuracy of air volume control, mine safety and ventilation efficiency of ventilation equipment.

[0061] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0063] Figure 1 This is a flow chart of a multi-level and multi-pan area coordinated mine air volume control method according to an embodiment of the present invention;

[0064] Figure 2 A schematic diagram of a multi-level multi-panel coordinated mine production structure according to an embodiment of the present invention;

[0065] Figure 3 A schematic diagram of a disk area structure according to an embodiment of the present invention;

[0066] Figure 4 A schematic diagram of the layout of an information collector and ventilation equipment according to an embodiment of the present invention;

[0067] Figure 5 A schematic diagram of an overall process of air volume control and early warning according to an embodiment of the present invention;

[0068] Figure 6It is a structural schematic diagram of a multi-level and multi-pan area coordinated mine air volume control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0070] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0071] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0073] Before describing the embodiments of the present application in detail, some nouns and terms involved in the embodiments of the present application are first described. The nouns and terms involved in the embodiments of the present application are subject to the following explanations.

[0074] Multi-level and multi-panel coordinated mining: refers to the coordinated operation of multiple levels and multiple panels within an underground mine production system to jointly achieve mine production goals.

[0075] Mine ventilation system: refers to the general term for the ventilation network, ventilation power and ventilation control facilities that supply fresh air to underground work sites and exhaust polluted air. It is an indispensable and important part of underground mine safety production.

[0076] Among the related technologies, multi-level and multi-pan area collaborative mining is an important development direction for underground mines to achieve large-scale, digital and intelligent mining. Mine ventilation is to achieve on-demand air supply through information collection, automatic decision-making and control equipment. Its core is to achieve on-demand air supply in mines to avoid insufficient or excessive air volume. Among them, insufficient air volume is likely to cause the air quality to fail to meet the requirements, affect the health of underground workers, and cause poisoning and suffocation accidents; while excessive air volume causes energy waste and increases production costs. At present, the ventilation of multi-level and multi-panel coordinated mining faces the following key problems: (1) The multi-level and multi-panel coordinated mining working faces are numerous and scattered, and the air volume required by the working faces changes with the changes in the working status; at the same time, the total air volume required for the whole mine is the sum of the air volume required by each working face, that is, the total air volume required for the whole mine is also dynamically changing. Traditional air volume control is generally achieved by manually controlling the state of ventilation structures (damper, wind window, etc.), which is difficult to achieve on-demand air supply for the whole mine and working face according to the changes in the working state of the working face, which easily leads to insufficient or excessive air volume in the whole mine or some areas, and low air volume control accuracy. (2) The supporting ventilation network of multi-level and multi-panel coordinated mining is complex. Under the conditions of complex ventilation network, the reasonable setting and control of ventilation control facilities is the key to the on-demand distribution of air volume. If the ventilation control facilities of the production level or the panel are not set up reasonably or cannot be regulated in time, it is easy to cause unreasonable air volume distribution for the production level and the panel. (3) When the ventilation network remains unchanged, the total air volume of the entire mine is affected by the main fan wind pressure and the natural wind pressure. The natural wind pressure changes with the natural climate change where the mine is located. When the natural wind pressure is in the same direction as the main fan wind pressure, it is beneficial to mine ventilation. Otherwise, it is not conducive to mine ventilation. Without considering the dynamic changes of natural wind pressure, it is difficult to achieve on-demand supply of the total air volume of the entire mine.

[0077] In view of this, in view of the problems and challenges of on-demand air supply in multi-level and multi-disk collaborative mining, this embodiment takes into account the operating status of the working face and the influence of natural wind pressure, realizes accurate on-demand air supply for the underground working face and the entire mine, forms a guarantee for the health and life safety of underground personnel, and achieves energy saving and consumption reduction. The system has an alarm function. When the underground air volume and air quality still cannot meet the requirements after intelligent regulation of the system, the system will alarm and require the evacuation of the operating personnel in the relevant area, which can effectively avoid the occurrence of accidents and provide guarantee for mine safety production. After optimizing the ventilation system and eliminating the alarm, the operation is resumed, forming a mechanism for optimizing and improving the ventilation system, and improving the inherent safety level of the ventilation system. At the same time, on-demand control of air volume can avoid excessive air supply and achieve energy saving and consumption reduction.

[0078] A multi-level multi-disk coordinated mine air volume control method provided in an embodiment of the present application relates to the field of mine engineering technology. A multi-level multi-disk coordinated mine air volume control method provided in an embodiment of the present application can be applied to a terminal, can also be applied to a server, and can also be software running in a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, and a car terminal, etc., but is not limited to this; the server side can be configured as an independent physical server, or it can be configured as a server cluster or distributed system composed of multiple physical servers, and can also be configured as a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network; the software can be an application that implements a multi-level multi-disk coordinated mine air volume control method, etc., but is not limited to the above forms.

[0079] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0080] The following is a detailed explanation of the embodiments of the present application in conjunction with the accompanying drawings:

[0081] Figure 1 This is an optional flow chart of a multi-level multi-pan coordinated mine air volume control method provided in an embodiment of the present application. Figure 1 The method may include but is not limited to steps S101 to S106.

[0082] Step S101, obtaining the mine ventilation system information of the multi-level multi-pan area coordinated mine, the multi-level multi-pan area coordinated mine includes a ventilation network, ventilation power equipment and ventilation control equipment, and the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters or fan operation information;

[0083] Step S102, calculating the required air volume of the target mining area according to the mine ventilation system information;

[0084] Step S103, calculating the required air volume of the target excavation working face according to the mine ventilation system information, where the required air volume of the target excavation working face includes the required air volume of the excavation working face within the panel area or the required air volume of the independent excavation working face;

[0085] Step S104, calculating the target air volume requirement according to the target stope air volume requirement and the target excavation working face air volume requirement, the target air volume requirement includes the panel air volume requirement, the horizontal working face air volume requirement or the whole mine air volume requirement;

[0086] Step S105, calculating the target fan operating frequency according to the air volume required for the entire mine;

[0087] Step S106: Control the air volume according to the target required air volume and the target fan operating frequency.

[0088] Steps S101 to S106 shown in the embodiment of the present application realize mine air volume control and improve accuracy.

[0089] In step S101 of some embodiments, the mine ventilation system information of the multi-level multi-panel coordinated mine can be obtained by an information collector or a sensor. The mine ventilation system information of the multi-level multi-panel coordinated mine can also be obtained by other means, not limited to this. Among them, the mine ventilation system information includes the operation information of the working face, ventilation parameters, mine climate parameters or fan operation information. The mine ventilation system information can be transmitted to the base station or the industrial computer through the transmission line. The working face operation information includes the panel operation information and the excavation working face operation information. The panel operation information mainly refers to the number of stopes and the operation status. The operation status includes rock drilling, rock breaking (blasting or mechanical crushing, etc.), mining, support, filling or suspension of operation; the operation status of the excavation working face operation information includes rock drilling, rock breaking (blasting or mechanical crushing, etc.), mucking, support or suspension of operation. The information collector can be a wired fixed instrument or a wireless mobile instrument. The information collector has built-in corresponding options, and the information is collected by filling in the operation team members. Its purpose is, on the one hand, to grasp the operating status of the underground panel area in real time, and on the other hand, to calculate the required air volume of the working face through operating information. Ventilation parameters include wind speed and volume, oxygen concentration, concentration of toxic and harmful substances, etc., which are collected through corresponding sensors. The concentration of toxic and harmful substances includes gas, carbon monoxide, nitrogen oxides, sulfur dioxide and dust concentration, etc. The locations of information collection include panel areas, excavation working faces, horizontal air inlet and return air lanes, and the total air inlet and return air shafts of mines. Mine climate parameters include atmospheric pressure, temperature, humidity, etc., which are collected through corresponding sensors. The collection locations are the total air inlet and return air shafts and horizontal air inlet and return air shafts of mines, etc. Fan operation information (fan operation status and parameters) includes the start and stop of the main fan and local fan, wind speed and volume, wind pressure and other information, which are collected through corresponding sensors.

[0090] In some embodiments, the multi-level multi-panel coordinated mine includes a ventilation network, ventilation power equipment and ventilation control equipment. Figure 2 As shown in Figure 1, there are at least 2 production levels, each production level has one or more production panels, and each production panel has one or more stopes. Figure 3 As shown, there are ordinary dampers, automatic adjustable dampers, panel return air lanes, stopes, excavation faces and panel air inlet lanes. The ventilation network includes the mine-wide air inlet and return shafts, horizontal air inlet and return shafts, panel-area air inlet and return shafts, excavation shafts and stopes; due to the multiple production levels and panels, the ventilation network is more complex. The ventilation power equipment includes main fans and local fans. The main fan serves the entire mine or one wing, and the local fan serves a single mining face. The ventilation control equipment includes dampers, adjustable dampers and adjustable windows, which are used to adjust the air volume at each production level or panel. The layout of the information collector and ventilation equipment is shown in the figure. Figure 4As shown, the panel area base station is connected to the operation information collection and early warning instrument, wind speed sensor, O2 sensor, toxic and harmful substance sensor, automatic air damper and local fan and frequency conversion controller, the independent excavation operation face base station is connected to the operation information collection and early warning instrument, wind speed sensor, O2 sensor, toxic and harmful substance sensor and local fan and frequency conversion controller, the production horizontal area base station is connected to the early warning instrument, climate parameter sensor, wind speed sensor, automatic air damper and automatic fan, the air inlet and return shaft base station is connected to the early warning instrument, climate parameter sensor and wind speed sensor, and the main fan base station is connected to the wind speed sensor, wind pressure sensor and main fan and frequency conversion controller.

[0091] In some embodiments, in step S102, the required air volume of the target mining area is calculated based on the mine ventilation system information, which may include but is not limited to steps S201 to S205.

[0092] Step S201, determining the stope operation status and stope type according to the mine ventilation system information;

[0093] Step S202, when the working state of the mining field is rock drilling, mechanical rock breaking, mining, support or filling, the required air volume of the target mining field is calculated according to the minimum required air volume per person per minute, the number of workers on the working face, the wind cross-sectional area of ​​the mining field, the dust exhaust wind speed of the mining field, the air volume index per unit power and the total operating power of the diesel equipment;

[0094] Step S203, when the stope operation state is blasting and the stope type is tunnel type, the required air volume of the target stope is calculated according to the ventilation time, the amount of explosives for a single blasting, the distance from the center of the blasting smoke position to the return air tunnel, and the stope cross-sectional area;

[0095] Step S204: when the stope operation state is blasting and the stope type is chamber type, the required air volume of the target stope is calculated according to the ventilation time, the amount of explosives for a single blasting, the volume of the stope chamber and the turbulent diffusion coefficient;

[0096] Step S205: When the stope operation state is suspended, the target stope air volume requirement is set to 0.

[0097] In some embodiments, the main operating states of the mine include rock drilling, blasting, mechanical rock breaking, mining, support, filling or suspension of operations, and the required air volume for different operating states is different. The mine operating state and mine type can be determined first based on the mine ventilation system information. When the mine operating state is rock drilling, mechanical rock breaking, mining, support or filling, the main purpose of ventilation is to provide breathing for workers, remove dust and exhaust gas, and the target mine required air volume can be calculated based on the minimum per capita air volume per minute, the number of workers on the working surface, the mine cross-sectional area, the mine dust exhaust wind speed, the unit power air volume index and the total operating power of the diesel equipment. When the mine operating state is blasting and the mine type is a tunnel type, the main purpose of ventilation after blasting is to remove blasting smoke. The target mine required air volume can be calculated based on the ventilation time, the amount of explosives for a single blasting, the distance from the center of the blasting smoke position to the return air lane, and the cross-sectional area of ​​the mine, where the target mine required air volume is calculated as follows: In the formula, Q c The target mining area requires air volume (m 3 / s), t is the ventilation time (can be 1200s-2400s), A is the amount of explosives for a single blast (Kg), L0 is the distance from the center of the blasting smoke position to the return air tunnel after the blasting in the stope (m), S is the cross-sectional area of ​​the stope (m 2 ). When the stope operation status is blasting and the stope type is chamber type, the main purpose of post-blasting ventilation is to remove blasting smoke. The target stope required air volume can be calculated based on the ventilation time, the amount of explosives for a single blast, the stope chamber volume and the turbulent diffusion coefficient. The target stope required air volume calculation formula is: In the formula, Q c The target mining area requires air volume (m 3 / s), t is the ventilation time (which can be 1200s-2400s), A is the amount of explosives for a single blast (Kg), V is the volume of the mine chamber (m 3 ), K w is the turbulent diffusion coefficient. When the stope operation status is suspended, there is no need to supply air volume to the stope, and the target stope required air volume can be set to 0.

[0098] In some embodiments, in step S202, the target mine required air volume is calculated based on the minimum air volume required per person per minute, the number of workers on the working face, the wind cross-sectional area of ​​the mine, the dust exhaust wind speed of the mine, the air volume index per unit power, and the total operating power of the diesel equipment, including:

[0099] Calculate the breathing air volume required by workers in the mining area based on the minimum air volume required per person per minute and the number of people working on the working surface;

[0100] Calculate the required air volume for dust removal in the mine based on the wind cross-sectional area and dust removal wind speed in the mine;

[0101] Calculate the required air volume for exhaust gas removal in the mining area based on the air volume per unit power index and the total operating power of the diesel equipment;

[0102] A maximum value is selected from the first air volume required to be selected as the target mine air volume required. The first air volume required to be selected includes the air volume required for breathing of mine workers, the air volume required for mine dust removal, and the air volume required for mine tail gas removal.

[0103] In some embodiments, the breathing air volume required by the workers in the mining field can be calculated based on the minimum per capita air volume required per minute and the number of workers on the working face, wherein the calculation formula for the breathing air volume required by the workers in the mining field is: Q1 = F d N0, where Q1 is the air volume required for breathing of workers in the mining area (m 3 / s), F d is the minimum air volume per person per minute that should be supplied per person per minute (m 3 / min), N0 is the maximum number of people working on the working face at the same time. Then, according to the wind cross-sectional area of ​​the mining area and the dust removal wind speed of the mining area, the required air volume for dust removal in the mining area is calculated. The calculation formula for the required air volume for dust removal in the mining area is: Q2 = S c v, where Q2 is the air volume required for dust removal in the mine (m 3 / s), S c is the cross-sectional area of ​​the mine (m 2 ), v is the dust removal wind speed in the mining area (m / s). In a chamber type mining area, v can be taken as 0.15, and in a tunnel type mining area or excavation working face, v can be taken as 0.25. Then, according to the unit power air volume index and the total operating power of the diesel equipment, the required air volume for exhaust gas removal in the mining area is calculated. The calculation formula for the required air volume for exhaust gas removal in the mining area is: Q3 = qN, where Q3 is the required air volume for exhaust gas removal in the mining area (m 3 / s), q is the wind volume per unit power (the value can be 4.Om 3 / min·kW), N is the total operating power of the diesel equipment (kW). Finally, a maximum value is selected from the first air volume required as the target mining site air volume Q c Among them, the first air volume required to be selected includes the air volume required for breathing of mining workers Q1, the air volume required for dust removal in the mining area Q2, and the air volume required for exhaust gas removal in the mining area Q3.

[0104] In some embodiments, in step S103, the required air volume of the target excavation working face is calculated according to the mine ventilation system information, which may include but is not limited to the following steps:

[0105] Determine the operating status of the excavation face based on the mine ventilation system information;

[0106] When the excavation face is in the state of rock drilling, mechanical rock breaking, mining or support, calculate the required air volume for breathing of workers on the excavation face, the required air volume for dust removal on the excavation face, and the required air volume for exhaust gas removal on the excavation face;

[0107] Select a maximum value from the second air volume required to be selected as the target tunneling operation face air volume required, the second air volume required to be selected includes the air volume required for breathing of tunneling operation face workers, the air volume required for dust removal from the tunneling operation face, and the air volume required for exhaust gas removal from the tunneling operation face;

[0108] When the excavation face is in blasting operation state, the required air volume of the target excavation face is calculated based on the ventilation time, tunnel length, single blasting explosive quantity and tunnel cross-sectional area;

[0109] When the excavation working face operation status is suspended, the target excavation working face required air volume is set to 0.

[0110] In some embodiments, the target excavation face air volume requirement may include the excavation face air volume requirement within the panel area or the independent excavation face air volume requirement, and the independent excavation face is independent of the panel area. The main operating states of the excavation face include rock drilling, blasting, mechanical rock breaking, mucking, support, filling or suspension of operation, etc., and the air volume required for different operating states is different. The operating state of the excavation face can be determined based on the mine ventilation system information, and then the operating state of the excavation face can be judged. When the operating state of the excavation face is rock drilling, mechanical rock breaking, mining or support, the breathing air volume required for the excavation face workers, the dust removal air volume required for the excavation face, and the exhaust gas removal air volume required for the excavation face are calculated. It is understandable that the breathing air volume required by the workers on the excavation face can be calculated by a calculation method similar to the breathing air volume required by the workers in the mining area, the dust removal air volume required by the excavation face can be calculated by a calculation method similar to the dust removal air volume required in the mining area, and the exhaust gas removal air volume required by the excavation face can be calculated by a calculation method similar to the exhaust gas removal air volume required in the mining area. Then, a maximum value is selected from the second air volume required to be selected as the target excavation face air volume required, and the second air volume required to be selected includes the breathing air volume required by the workers on the excavation face, the dust removal air volume required on the excavation face, and the exhaust gas removal air volume required on the excavation face. When the excavation face is in the blasting state, the target excavation face air volume required is calculated based on the ventilation time, the length of the tunnel, the amount of explosives for a single blast, and the cross-sectional area of ​​the tunnel, where the calculation formula for the target excavation face air volume required is: In the formula, Q j is the required air volume for the target excavation face, t is the ventilation time (s), A is the amount of explosives for a single blast (Kg), L r is the tunnel length (m), S x is the cross-sectional area of ​​the tunnel (m 2). When the excavation face operation state is suspended, there is no need to supply air volume to the excavation face, and the target excavation face required air volume can be set to 0.

[0111] In some embodiments, in step S104, the target required air volume is calculated according to the target required air volume of the stope and the target required air volume of the excavation working face, which may include but is not limited to the following steps:

[0112] Calculate the required air volume of the panel area based on the required air volume of the target mining area and the required air volume of the excavation working face in the panel area;

[0113] Calculate the required air volume for the horizontal working face based on the required air volume for the panel area and the required air volume for the independent excavation working face;

[0114] Calculate the air volume required for the entire mine based on the air volume required for multiple horizontal working surfaces.

[0115] In some embodiments, the target air volume requirement can be calculated based on the target stope air volume requirement and the target excavation face air volume requirement, wherein the target air volume requirement can include the panel air volume requirement, the horizontal face air volume requirement, or the whole mine air volume requirement. The panel air volume requirement can be calculated based on the target stope air volume requirement and the excavation face air volume requirement in the panel. For example, the target stope air volume requirement and the excavation face air volume requirement in the panel can be added to obtain the panel air volume requirement, wherein the calculation formula of the panel air volume requirement is: Q p =Q c +Q j , where Q p is the required air volume of the panel, Q c is the air volume required for the target mining area, Q j is the required air volume of the excavation working face in the panel area. Then, the required air volume of the horizontal working face is calculated based on the required air volume of the panel area and the required air volume of the independent excavation working face. For example, the required air volume of the panel area and the required air volume of the independent excavation working face can be added to obtain the required air volume of the horizontal working face. Finally, the required air volume of the whole mine is calculated based on the required air volume of multiple horizontal working faces. For example, the required air volume of multiple horizontal working faces can be added to obtain the required air volume of the whole mine, where the calculation formula of the required air volume of the whole mine is: In the formula, Q k is the air volume required for the whole mine, U is the total number of horizontal working surfaces, Q su is the required air volume for the u-th horizontal working surface.

[0116] In some embodiments, in step S105, the target fan operating frequency is calculated according to the required air volume of the entire mine, which may include but is not limited to the following steps:

[0117] Calculate the density of measuring points along the way according to atmospheric pressure and air temperature;

[0118] According to the density of measuring points along the way, the height difference between measuring points along the way and the vertical height difference of the shafts and tunnels, the average density of the target shafts and tunnels is calculated. The average density of the target shafts and tunnels includes the average density of the air intake shafts and tunnels or the average density of the return air shafts and tunnels.

[0119] Calculate the natural wind pressure based on the average density of the air intake shaft and the average density of the return air shaft, gravity acceleration and the vertical height difference of the shaft and the shaft;

[0120] Calculate the target fan wind pressure based on the natural wind pressure, ventilation network wind resistance, total mine air volume, main fan device resistance and outlet dynamic pressure loss;

[0121] The target fan operating frequency is calculated according to the target fan wind pressure, the current fan wind pressure and the current fan operating frequency.

[0122] In some embodiments, the fan operating condition parameters include wind pressure parameters and wind volume parameters. The density of measurement points along the way can be calculated based on the atmospheric pressure and air temperature collected by the information collector, where the calculation formula of the density of measurement points along the way is: Where ρ is the density of the measuring points along the way (kg / m 3 ), P is the atmospheric pressure (Pa), and w is the air temperature (℃). Then, according to the density of measuring points along the way, the height difference between measuring points along the way, and the vertical height difference of the shaft and tunnel, the average density of the target shaft and tunnel is calculated, wherein the average density of the target shaft and tunnel may include the average density of the air intake shaft and tunnel or the average density of the return air shaft and tunnel, that is, the average density of the air intake shaft and tunnel or the average density of the return air shaft and tunnel may be calculated by the calculation formula of the average density of the target shaft and tunnel. The calculation formula of the average density of the target shaft and tunnel is: In the formula, ρ ave is the average density of the target shaft (kg / m 3 ), ρ n is the density of measuring points along the nth shaft (kg / m 3 ), Z (n-1)～n is the height difference between the n-1th and nth shafts and tunnels along the way (m), and Z is the vertical height difference of the shaft and tunnel (m). Then, the natural wind pressure is calculated based on the average density of the air intake shaft and tunnel, the average density of the return air shaft and tunnel, the gravity acceleration and the vertical height difference of the shaft and tunnel. The calculation formula of natural wind pressure is: H n =(ρ j +ρ h )*g*Z, where H n is the natural wind pressure (Pa), ρ j is the average density of the air intake shaft (kg / m 3 ), ρ h is the average density of the return air shaft (kg / m 3 ), g is the acceleration due to gravity (9.8 m / s 2 ), Z is the vertical height difference of the shaft (m). It can be understood that the natural wind pressure H nIt can be used to calculate the target fan pressure or main fan pressure in the subsequent calculation. The different density in the air intake and return shafts leads to the generation of natural wind pressure. When the vertical height difference between the air intake and return shafts in the mine is different, the one with the smaller vertical height difference can be virtually added on the surface to make the vertical depth of the air intake and return shafts the same. Then, the target fan pressure is calculated based on the natural wind pressure, ventilation network wind resistance, required air volume of the whole mine, main fan device resistance and outlet dynamic pressure loss. The calculation formula of the target fan pressure is: H f =RQ k 2 +h r +h v -H n , where H f is the target fan wind pressure (Pa), R is the ventilation network wind resistance (N·s 2 / m 8 ), Q k The air volume required for the whole mine (m 3 / s), h r Main fan device resistance (Pa), h v is the outlet dynamic pressure loss (Pa), H n is the natural wind pressure (Pa). It can be understood that for a specific ventilation system, the ventilation network wind resistance R, the main fan device resistance h r and outlet dynamic pressure loss h v All are fixed values ​​or can be regarded as fixed values. Natural wind pressure changes with local natural climate changes. Finally, the target fan operating frequency is calculated based on the target fan wind pressure, current fan wind pressure and current fan operating frequency. The calculation formula for the target fan operating frequency is: Where f1 is the target fan operating frequency, f2 is the current fan operating frequency, H f is the target fan pressure (Pa), H d is the current fan pressure (Pa). It can be understood that the fan pressure is proportional to the square of the fan operating frequency.

[0123] In some embodiments, in step S106, air volume control is performed according to the target required air volume and the target fan operating frequency, which may include but is not limited to the following steps:

[0124] When the control area is the whole mine area, the air volume of the main fan is controlled according to the air volume required by the whole mine and the target fan operating frequency;

[0125] When the control area is a horizontal working surface, the air volume is controlled by automatically adjusting the damper on the horizontal return air side according to the required air volume on the horizontal working surface;

[0126] When the control area is a panel, the air volume is controlled by automatically adjusting the damper on the return air lane on the return air side of the panel according to the required air volume of the panel;

[0127] When the control area is the excavation working face, the air volume of the local fan is controlled according to the required air volume of the target excavation working face.

[0128] In some embodiments, different ventilation control equipment can be controlled in different control areas. When the control area is the whole mine area, the main fan can be controlled according to the required air volume of the whole mine and the target fan operating frequency. Exemplarily, the intelligent control of the air volume of the whole mine can be achieved through the intelligent control of the main fan. The main fan is equipped with a frequency conversion controller. After the industrial computer calculates the operating frequency of the main fan and the corresponding fan operating frequency based on the operating information collection of the working surface and the built-in main fan fan operating condition calculation method according to the required air volume of the whole mine, the industrial computer issues a control instruction, and the instruction is transmitted to the main fan frequency conversion controller through the base station to realize the automatic frequency conversion control of the main fan operation. When the control area is a horizontal working surface, the air volume can be controlled by automatically adjusting the damper on the horizontal return air side according to the required air volume of the horizontal working surface. Exemplarily, each horizontal return air side is equipped with an automatic damper or an automatic damper. After the industrial computer calculates the required air volume of the horizontal working surface based on the work surface operation information collection and the built-in required air volume calculation method, the industrial computer issues a control instruction to control the automatic damper or the automatic damper to achieve intelligent control of each horizontal air volume. When the control area is a panel area, the air volume can be controlled by automatically adjusting the damper of the return air lane on the panel return air side according to the required air volume of the panel area. Exemplarily, each panel return air side return air lane is equipped with an automatic damper. After the industrial computer calculates the required air volume of the panel area based on the work surface operation information collection and the built-in required air volume calculation method, the industrial computer issues a control instruction to control the automatic damper to achieve intelligent control of the air volume of each panel area. When the control area is an excavation work surface, the air volume of the local fan can be controlled according to the required air volume of the target excavation work surface. Exemplarily, the intelligent control of the excavation working air volume is achieved through the intelligent control of local fans. The local fan fans are equipped with frequency conversion controllers. After the industrial computer calculates the required air volume of the target excavation working face and the corresponding fan operating frequency based on the working face operation information collection and the built-in required air volume calculation method, the industrial computer issues a local fan frequency conversion control instruction to achieve intelligent control of the air volume of each excavation working face.

[0129] In some embodiments, the method further comprises:

[0130] After air volume control is performed, if the concentration of toxic and harmful substances or oxygen concentration in the control area does not meet the operating requirements, an alarm signal is generated, and the alarm signal is used to control the early warning instrument to sound an alarm.

[0131] In some embodiments, an early warning instrument is configured at the air intake tunnel of the whole mine, the horizontal air intake tunnel, the panel area, the independent excavation working face, etc. The early warning instrument can be integrated with the operation information collection instrument in the real-time information collection system, and the integration is an operation information collection and early warning instrument. After the air volume control is performed, the air quality in the control area can be judged. If the concentration of toxic and harmful substances or the oxygen concentration in the control area does not meet the operation requirements, an alarm signal is generated, wherein the alarm signal is used to control the early warning instrument to alarm. Exemplarily, based on the real-time collection of information such as air volume, concentration of toxic and harmful substances, and oxygen concentration, when the air volume, concentration of toxic and harmful substances or oxygen concentration of the independent excavation working face, the panel area or the whole mine does not meet the operation requirements, the air volume of the whole mine, the level, the panel area and the excavation working face is automatically regulated to increase the air volume. If the air volume, concentration of toxic and harmful substances or oxygen concentration still does not meet the operation requirements after regulation, the alarm of the independent excavation working face, the panel area or the whole mine is performed according to the situation. In the case of an independent excavation face alarm, if the air volume, toxic and harmful substance concentration or oxygen concentration of the independent excavation face still does not meet the operating requirements after air volume control, the operation information collection and early warning instrument of the corresponding independent excavation face will issue an alarm, evacuate the independent excavation face workers, and suspend operations. In the case of a panel area alarm, if the air volume, toxic and harmful substance concentration or oxygen concentration of the panel area still does not meet the operating requirements after air volume control, the operation information collection and early warning instrument of the corresponding panel area will issue an alarm, evacuate the panel area workers, and suspend operations. In the case of a mine-wide alarm, if the air volume of the entire mine seriously does not meet the operating requirements after control (such as the air volume of the entire mine is less than 60% of the required air volume), all early warning instruments in the entire mine will issue an alarm, evacuate the underground workers, and suspend operations. After an independent excavation face, panel area or the entire mine generates an alarm, manual technical intervention can be carried out. Technical personnel use the real-time three-dimensional ventilation network solution system to develop solutions, improve and transform the multi-level and multi-pan area mine ventilation system, and resume operations after eliminating the alarm and re-enter related operations.

[0132] In some embodiments, the method further comprises:

[0133] Model the multi-level and multi-panel coordinated mine to obtain a three-dimensional simulation model;

[0134] Input the mine climate parameters into the three-dimensional simulation model, and perform three-dimensional ventilation network solution to obtain ventilation optimization strategy, which includes ventilation network optimization strategy, ventilation power equipment optimization strategy and ventilation control equipment optimization strategy;

[0135] Optimize the mine ventilation system according to the ventilation optimization strategy.

[0136] In some embodiments, a multi-level multi-panel collaborative mine can be modeled first to obtain a three-dimensional simulation model, and then the mine climate parameters obtained by information collection are input into the three-dimensional simulation model, and a real-time and accurate three-dimensional ventilation network solution is performed to obtain a ventilation optimization strategy, which can be used to guide the design and construction of ventilation tunnel engineering. Among them, the ventilation optimization strategy can include a ventilation network optimization strategy, a ventilation power equipment optimization strategy, and a ventilation control equipment optimization strategy. Finally, according to the ventilation optimization strategy, the mine ventilation system is optimized, and the main fan, local fan, horizontal return air side automatic adjustment damper or panel return air side return air lane automatic adjustment damper in the mine ventilation system can be adjusted. More importantly, the three-dimensional simulation model and the three-dimensional ventilation network solution can also be used to assist in the formulation of alarm plans. The real-time three-dimensional ventilation network solution results can be integrated into the industrial computer of the intelligent control center.

[0137] In some embodiments, the overall process of air volume control and warning is as follows: Figure 5 As shown, a multi-level multi-panel system mine intelligent ventilation system can be established first, and the ventilation system can be operated, mainly including the opening of the main fan and the operation of ventilation control facilities. Then, information collection and transmission are carried out, the required air volume and the main fan operating conditions are calculated, and the required air volume threshold interval is generated. Then, intelligent control is performed according to the required air volume to determine whether the measured air volume is within the target air volume threshold interval. If the measured air volume is not within the target air volume threshold interval, intelligent control is performed again; otherwise, it is determined whether the air quality meets the operating requirements. If it still does not meet the operating requirements after intelligent control, an alarm is implemented and manual technical intervention is performed.

[0138] In some embodiments, this embodiment realizes accurate on-demand air supply for underground working faces and the entire mine by means of information collection, intelligent control, early warning, and three-dimensional ventilation network solution, taking into account the operating status of the working face and the influence of natural wind pressure. It can avoid insufficient air volume leading to air quality not meeting the requirements, posing a threat to the health and life safety of underground personnel, and it can also avoid excessive air volume, resulting in energy waste. This embodiment has an alarm function. When the air volume and air quality of the independent excavation working face, the panel area or the entire mine still cannot meet the operating requirements after the system's intelligent regulation, the system will alarm, requiring the suspension of operations and the withdrawal of operators in the relevant areas, which can effectively avoid accidents. Then, manual technical intervention is carried out. The technicians use the real-time three-dimensional ventilation network solution system to formulate solutions, improve and transform the multi-level and multi-pan mine ventilation system, and resume operations after eliminating the alarm, forming a mechanism for optimizing and improving the ventilation system during the production process.

[0139] The beneficial effects of implementing the embodiments of the present invention include: the embodiments of the present invention first obtain the mine ventilation system information of the multi-level multi-pan area coordinated mine, then calculate the target mining area air volume according to the mine ventilation system information, and calculate the target excavation working face air volume according to the mine ventilation system information, and then calculate the target air volume according to the target mining area air volume and the target excavation working face air volume, and calculate the target fan operating frequency according to the whole mine air volume, and finally control the air volume according to the target air volume and the target fan operating frequency, so that the mine air volume control can be realized by calculating the required air volume, thereby improving the accuracy. At the same time, the on-demand air supply of this embodiment takes into account the operating status of the working face and the influence of natural wind pressure, realizes the precise on-demand air supply of the underground working face and the whole mine, forms a guarantee for the health and life safety of the underground personnel, and realizes energy saving and consumption reduction. And it has an alarm function, which can effectively avoid accidents caused by ventilation not meeting the requirements, forming a mechanism for optimizing and improving the ventilation system in the production process, and improving the inherent safety level of the ventilation system.

[0140] like Figure 6 As shown, the embodiment of the present invention also provides a multi-level multi-panel coordinated mine air volume control system, including:

[0141] A mine ventilation system information acquisition module 601 is used to acquire the mine ventilation system information of a multi-level multi-panel coordinated mine. The multi-level multi-panel coordinated mine includes a ventilation network, ventilation power equipment and ventilation control equipment. The mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters or fan operation information.

[0142] The air volume requirement calculation module 602 is used to calculate the target air volume requirement according to the mine ventilation system information. The target air volume requirement includes the air volume requirement of the panel area, the air volume requirement of the horizontal working surface or the air volume requirement of the whole mine;

[0143] The fan operating condition calculation module 603 is used to calculate the target fan operating frequency according to the required air volume of the whole mine;

[0144] The equipment parameter control module 604 is used to control the air volume according to the target required air volume and the target fan operating frequency;

[0145] The early warning module 605 is used to generate an alarm signal according to the concentration of toxic and harmful substances or oxygen concentration in the control area after the air volume is controlled. The alarm signal is used to control the early warning instrument to alarm;

[0146] The three-dimensional ventilation network solution module 606 is used to establish a three-dimensional simulation model and perform three-dimensional ventilation network solution to obtain a ventilation optimization strategy. The ventilation optimization strategy includes a ventilation network optimization strategy, a ventilation power equipment optimization strategy and a ventilation control equipment optimization strategy. The ventilation optimization strategy is used to optimize the mine ventilation system.

[0147] In some embodiments, a multi-level multi-pan area coordinated mine air volume control system provided in this embodiment includes a mine ventilation system information collection module 601, a required air volume calculation module 602, a fan operating condition calculation module 603, an equipment parameter control module 604, an early warning module 605 and a three-dimensional ventilation network solution module 606. The mine ventilation system information of the multi-level multi-pan area coordinated mine can be obtained through the mine ventilation system information collection module, wherein the multi-level multi-pan area coordinated mine includes a ventilation network, ventilation power equipment and ventilation control equipment, and the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters or fan operation information. Exemplarily, information such as working face operation information, ventilation parameters, mine climate parameters, fan operation information (fan operation status and parameters) can be collected through information collection instruments or sensors, and the information is transmitted to the industrial computer of the intelligent control center after collection. According to the mine ventilation system information, the target required air volume can be calculated through the required air volume calculation module, wherein the target required air volume includes the required air volume of the pan area, the required air volume of the horizontal working face or the required air volume of the whole mine. And according to the required air volume of the whole mine, the target fan operating frequency is calculated through the fan operating condition calculation module. For example, the industrial computer calculates the required air volume of the independent excavation working face, each panel area, each level and the whole mine based on the real-time collection information and the built-in calculation method, and calculates the main fan air volume, wind pressure and operating frequency considering the influence of natural wind pressure. According to the calculation results, the target air volume threshold interval for the independent excavation working face, each panel area, each level and the whole mine is generated, and the target air volume threshold interval is 100% to 120% of the required air volume. The air volume can be controlled by the equipment parameter control module according to the target required air volume and the target fan operating frequency. For example, according to the target air volume threshold interval and the target fan operating frequency, the air volume of the whole mine, level, panel area and excavation working face can be intelligently controlled on demand by controlling the main fan operating frequency, automatically adjusting the damper, automatically adjusting the wind window, and the local fan operating frequency. More importantly, based on information collection, it is determined whether the air volume of the entire mine, the panel area, and the independent excavation working face is within the target air volume threshold range. If it is within the target air volume threshold range, the air quality is determined. If it is not within the target air volume threshold range, the ventilation control equipment is regulated again. The air volume of the entire mine, the panel area, and the independent excavation working face is regulated by controlling the main fan operating frequency, automatic adjustment of the damper, automatic adjustment of the wind window, and the local fan operating frequency. In the air quality judgment, based on information collection, it is determined whether the air quality (toxic and harmful substance concentration, oxygen concentration) of the panel area and the independent excavation working face meets the operating requirements. If the air quality does not meet the operating requirements, the target air volume threshold range is increased by 10%, and the ventilation control equipment is regulated again. If the air volume of the entire mine, the panel area, and the independent excavation working face is within the target air volume threshold range, and the air quality of the panel area and the independent excavation working face meets the operating requirements, the ventilation system will continue to operate in this state.After the air volume is controlled, an alarm signal can be generated by the early warning module according to the concentration of toxic and harmful substances or oxygen concentration in the control area, wherein the alarm signal is used to control the early warning instrument to alarm. Exemplarily, when the air volume or air quality of the panel area or independent excavation working face still cannot meet the operation requirements after automatic intelligent control, the early warning instrument of the relevant panel area and independent excavation working face implements an alarm, withdraws the personnel of the panel area or independent excavation working face, and immediately suspends the operation. After automatic intelligent control, when the air volume of the whole mine seriously does not meet the operation requirements (such as the air volume of the whole mine is less than 60% of the required air volume), all early warning instruments in the whole mine implement an alarm and withdraw all underground workers. A three-dimensional simulation model can be established through a three-dimensional ventilation network solution module, and a three-dimensional ventilation network solution can be performed to obtain a ventilation optimization strategy, wherein the ventilation optimization strategy can include a ventilation network optimization strategy, a ventilation power equipment optimization strategy, and a ventilation control equipment optimization strategy. The ventilation optimization strategy is used to optimize the mine ventilation system to improve the ventilation efficiency of the ventilation equipment. More often, manual technical intervention is implemented for alarms in independent excavation work faces, panels or the entire mine. Technical personnel can use the three-dimensional ventilation network solution module to develop solutions, improve the multi-level and multi-panel mine ventilation system, and resume operations after eliminating the alarms.

[0148] The beneficial effects of implementing the embodiments of the present invention include: a multi-level multi-pan area coordinated mine air volume control system provided by the embodiments of the present invention includes a mine ventilation system information acquisition module, a required air volume calculation module, a fan operating condition calculation module, an equipment parameter control module, an early warning module and a three-dimensional ventilation network solution module. Among them, the mine ventilation system information acquisition module is used to obtain the mine ventilation system information of the multi-level multi-pan area coordinated mine; the required air volume calculation module is used to calculate the target required air volume; the fan operating condition calculation module is used to calculate the target fan operating frequency; the equipment parameter control module is used to control the air volume according to the target required air volume and the target fan operating frequency; the early warning module is used to generate an alarm signal according to the concentration of toxic and harmful substances or oxygen concentration in the control area to alarm; the three-dimensional ventilation network solution module is used to establish a three-dimensional simulation model and perform a three-dimensional ventilation network solution to optimize the mine ventilation system, so that the mine air volume control can be achieved through the calculation of the required air volume, and safety early warning and mine ventilation system control can be performed, thereby improving the accuracy of air volume control, mine safety and ventilation efficiency of ventilation equipment.

[0149] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A multi-level and multi-panel coordinated mine air volume control method, characterized in that: The following steps are involved: Acquire mine ventilation system information of a multi-level multi-pan coordinated mine, wherein the multi-level multi-pan coordinated mine includes a ventilation network, ventilation power equipment, and ventilation control equipment, and the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters, or fan operation information; Calculate the required air volume of the target mining area according to the mine ventilation system information; Calculate the required air volume of the target excavation working face according to the mine ventilation system information, wherein the required air volume of the target excavation working face includes the required air volume of the excavation working face within the panel area or the required air volume of the independent excavation working face; Calculate the target air volume requirement according to the target stope air volume requirement and the target excavation working face air volume requirement, wherein the target air volume requirement includes the panel air volume requirement, the horizontal working face air volume requirement or the whole mine air volume requirement; Calculate the target fan operating frequency based on the total mine air volume requirement; The air volume is controlled according to the target required air volume and the target fan operating frequency.

2. The method according to claim 1, characterized in that The step of calculating the required air volume of the target mining area according to the mine ventilation system information includes: Determine the stope operation status and stope type according to the mine ventilation system information; When the working state of the mining site is rock drilling, mechanical rock breaking, mining, support or filling, the required air volume of the target mining site is calculated according to the minimum required air volume per person per minute, the number of workers on the working face, the wind cross-sectional area of ​​the mining site, the dust exhaust wind speed of the mining site, the air volume index per unit power and the total operating power of the diesel equipment; When the stope operation state is blasting and the stope type is tunnel type, the required air volume of the target stope is calculated according to the ventilation time, the amount of explosives for a single blast, the distance from the center of the blasting smoke position to the return air tunnel, and the cross-sectional area of ​​the stope; When the stope operation state is blasting and the stope type is a chamber type, the required air volume of the target stope is calculated according to the ventilation time, the amount of explosives for a single blast, the volume of the stope chamber and the turbulent diffusion coefficient; When the stope operation state is suspended, the target stope required air volume is set to 0.

3. The method according to claim 2, characterized in that The target mine air volume required is calculated based on the minimum air volume required per person per minute, the number of workers on the working face, the wind cross-sectional area of ​​the mine, the dust exhaust wind speed of the mine, the air volume index per unit power and the total operating power of the diesel equipment, including: Calculate the breathing air volume required by the workers in the mining area according to the minimum air volume required per person per minute and the number of workers on the working face; Calculate the required air volume for dust removal in the mine according to the wind cross-sectional area of ​​the mine and the dust removal wind speed in the mine; Calculate the required air volume for exhaust gas removal from the mining area according to the air volume per unit power index and the total operating power of the diesel equipment; A maximum value is selected from the first air volume requirements to be selected as the target mine air volume requirement, wherein the first air volume requirements to be selected include the air volume required for breathing of mine workers, the air volume required for dust removal in the mine, and the air volume required for exhaust gas removal in the mine.

4. The method according to claim 1, characterized in that The step of calculating the required air volume of the target excavation working face according to the mine ventilation system information includes: Determining the operating status of the excavation working face according to the mine ventilation system information; When the working state of the tunneling working face is rock drilling, mechanical rock breaking, mining or support, the required air volume for breathing of workers on the tunneling working face, the required air volume for dust removal on the tunneling working face and the required air volume for exhaust gas removal on the tunneling working face are calculated; Select a maximum value from the second air volume required to be selected as the target tunneling face air volume required, wherein the second air volume required to be selected includes the air volume required for breathing of workers on the tunneling face, the air volume required for dust removal on the tunneling face, and the air volume required for exhaust gas removal on the tunneling face; When the excavation working face is in blasting operation state, the required air volume of the target excavation working face is calculated according to the ventilation time, the tunnel length, the amount of explosives for a single blasting and the tunnel cross-sectional area; When the operation state of the excavation working face is suspended operation, the required air volume of the target excavation working face is set to 0.

5. The method according to claim 1, characterized in that The target required air volume is calculated according to the target required air volume of the stope and the target required air volume of the excavation working face, including: Calculating the required air volume of the panel area according to the required air volume of the target stope and the required air volume of the excavation working face in the panel area; Calculate the required air volume of the horizontal working surface according to the required air volume of the panel area and the required air volume of the independent excavation working surface; The air volume requirement for the entire mine is calculated based on the air volume requirements for the multiple horizontal working surfaces.

6. The method according to claim 1, characterized in that The target fan operating frequency is calculated according to the required air volume of the whole mine, including: Calculate the density of measuring points along the way according to atmospheric pressure and air temperature; According to the density of the measuring points along the way, the height difference between the measuring points along the way and the vertical height difference of the shafts and lanes, the average density of the target shafts and lanes is calculated, and the average density of the target shafts and lanes includes the average density of the air intake shafts and lanes or the average density of the return air shafts and lanes; Calculating the natural wind pressure according to the average density of the air intake shaft and lane, the average density of the return air shaft and lane, the gravity acceleration and the vertical height difference of the shaft and lane; Calculate the target fan wind pressure according to the natural wind pressure, the wind resistance of the ventilation network, the required air volume of the entire mine, the resistance of the main fan device and the outlet dynamic pressure loss; The target fan operating frequency is calculated according to the target fan wind pressure, the current fan wind pressure and the current fan operating frequency.

7. The method according to claim 1, characterized in that The air volume control according to the target required air volume and the target fan operating frequency includes: When the control area is the whole mine area, the air volume of the main fan is controlled according to the required air volume of the whole mine and the target fan operating frequency; When the control area is a horizontal working surface, the air volume is controlled by automatically adjusting the damper on the horizontal return air side according to the air volume required by the horizontal working surface; When the control area is a panel area, the air volume is controlled by automatically adjusting the damper of the return air lane on the return air side of the panel area according to the required air volume of the panel area; When the control area is a tunneling working face, the air volume of the local fan is controlled according to the target required air volume of the tunneling working face.

8. The method according to claim 1, characterized in that: The method further comprises: After the air volume is controlled, if the concentration of toxic and harmful substances or oxygen concentration in the control area does not meet the operating requirements, an alarm signal is generated, and the alarm signal is used to control the early warning instrument to alarm.

9. The method according to claim 1, characterized in that: The method further comprises: Model the multi-level and multi-panel coordinated mine to obtain a three-dimensional simulation model; Inputting the mine climate parameters into the three-dimensional simulation model, and performing three-dimensional ventilation network solution to obtain a ventilation optimization strategy, wherein the ventilation optimization strategy includes a ventilation network optimization strategy, a ventilation power equipment optimization strategy, and a ventilation control equipment optimization strategy; According to the ventilation optimization strategy, the mine ventilation system is optimized.

10. A multi-level and multi-panel coordinated mine air volume control system, characterized in that: include: A mine ventilation system information acquisition module, the mine ventilation system information acquisition module is used to obtain mine ventilation system information of a multi-level multi-pan area coordinated mine, the multi-level multi-pan area coordinated mine includes a ventilation network, ventilation power equipment and ventilation control equipment, the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters or fan operation information; An air volume requirement calculation module, the air volume requirement calculation module is used to calculate the target air volume requirement according to the mine ventilation system information, the target air volume requirement includes the air volume requirement of the panel area, the air volume requirement of the horizontal working surface or the air volume requirement of the whole mine; A fan operating condition calculation module, the fan operating condition calculation module is used to calculate the target fan operating frequency according to the required air volume of the entire mine; An equipment parameter control module, the equipment parameter control module is used to control the air volume according to the target required air volume and the target fan operating frequency; An early warning module, which is used to generate an alarm signal according to the concentration of toxic and harmful substances or oxygen concentration in the control area after the air volume is controlled, and the alarm signal is used to control the early warning instrument to alarm; A three-dimensional ventilation network solution module, which is used to establish a three-dimensional simulation model and perform three-dimensional ventilation network solution to obtain a ventilation optimization strategy. The ventilation optimization strategy includes a ventilation network optimization strategy, a ventilation power equipment optimization strategy and a ventilation control equipment optimization strategy. The ventilation optimization strategy is used to optimize the mine ventilation system.

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