A multi-level and multi-panel coordinated mine air volume control method and system

Abstract

The present invention discloses a multi-level, multi-panel coordinated mine air volume control method and system. The method includes: obtaining mine ventilation system information of a multi-level, multi-panel coordinated mine; calculating the target stope air volume requirement based on the mine ventilation system information; calculating the target excavation face air volume requirement based on the mine ventilation system information, the target excavation face air volume requirement including the excavation face air volume requirement within the panel or the independent excavation face air volume requirement; calculating the target air volume requirement based on the target stope air volume requirement and the target excavation face air volume requirement; calculating the target fan operating frequency based on the mine-wide air volume requirement; and performing air volume control based on the target air volume requirement and the target fan operating frequency. The present invention realizes mine air volume control and improves accuracy. The present invention can be widely applied in the field of mine engineering technology.

Description

Technical Field

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

[0002] Multi-level and multi-panel collaborative mining refers to the collaborative operation of multiple levels and multiple panels within an underground mine production system to jointly achieve mine production goals. Multi-level and multi-panel collaborative mining has many and dispersed working faces. The required air volume of the working face changes with the changes in the working status and is affected by the main fan pressure and natural wind pressure. At present, traditional air volume control is achieved by manually controlling the status of ventilation structures (dampers, windows, etc.). However, the control personnel's judgment on the required air volume of the working face is inaccurate, making it difficult to supply air on demand, which can easily lead to insufficient or excessive air volume in the mine area and low air volume control accuracy.

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

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

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

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

[0007] Calculating the required air volume of the target stope based on the mine ventilation system information;

[0008] Calculating the target tunneling working face air volume requirement based on the mine ventilation system information, wherein the target tunneling working face air volume requirement includes the tunneling working face air volume requirement within the panel area or the independent tunneling working face air volume requirement;

[0009] Calculating target air volume requirements based on the target stope air volume requirements and the target excavation working face air volume requirements, wherein the target air volume requirements include the panel air volume requirements, the horizontal working face air volume requirements, or the entire mine air volume requirements;

[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 target stope air volume requirement based on the mine ventilation system information includes:

[0013] determining the stope operation status and stope type based on the mine ventilation system information;

[0014] When the stope operation status is rock drilling, mechanical rock breaking, ore extraction, support or filling, the target stope air volume requirement is calculated based on the minimum air volume per person per minute, the number of workers on the working face, the stope cross-sectional area, the stope dust exhaust wind speed, the unit power air volume index 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 based on 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 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 air volume requirement is set to 0.

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

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

[0020] Calculating the required air volume for dust removal in the mine based on 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 based on the air volume per unit power index 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 requirement to be selected includes the air volume required for breathing of the mine workers, the air volume required for removing dust from the mine, and the air volume required for removing exhaust gas from the mine.

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

[0024] Determining the operating status of the tunneling working face based on the mine ventilation system information;

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

[0026] Selecting a maximum value from a second set of air volume requirements as the target tunneling face air volume requirement, the second set of air volume requirements including the air volume required for breathing of tunneling face workers, the air volume required for dust removal from the tunneling face, and the air volume required for exhaust gas removal from 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 blast, 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] Calculating the required air volume of the horizontal working face according to the required air volume of the panel area and the required air volume of the independent excavation working face;

[0032] The air volume requirement for the entire mine is calculated based on the air volume requirements of 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 based on atmospheric pressure and air temperature;

[0035] Calculate the target tunnel average density based on the density of measurement points along the way, the height difference between measurement points along the way, and the vertical height difference of the tunnel, wherein the target tunnel average density includes the average density of the air intake tunnel or the average density of the return air tunnel;

[0036] Calculating the natural wind pressure based on the average density of the air intake shaft and the average density of the return air shaft and the acceleration of gravity and the vertical height difference of the shaft and the shaft;

[0037] Calculating a target fan wind pressure based on the natural wind pressure, ventilation network wind resistance, the total mine air volume requirement, main fan device resistance, and 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 performing of air volume control according to the target required air volume and the target fan operating frequency includes:

[0040] When the control area is the entire mine area, the air volume of the main fan is controlled according to the air volume required by the entire 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, the air volume is controlled by automatically adjusting the damper on the return air channel of the panel return air side according to the required air volume of the panel;

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

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

[0047] Modeling of multi-level and multi-panel coordinated mines to obtain a three-dimensional simulation model;

[0048] Inputting the mine climate parameters into the three-dimensional simulation model and performing a 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 based on the mine ventilation system information, and calculates the target excavation working face air volume requirement based on the mine ventilation system information, and then calculates the target air volume requirement based on the target mining area air volume requirement and the target excavation working face air volume requirement, and calculates the target fan operating frequency based on the air volume requirement of the entire mine, and finally performs air volume control based on the target air volume requirement and the target fan operating frequency, so that mine air volume control can be achieved through the calculation of the air volume requirement, 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-panel coordinated mine, the multi-level, multi-panel coordinated mine including a ventilation network, ventilation power equipment, and ventilation control equipment, the mine ventilation system information including 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 a target air volume requirement based on the mine ventilation system information, the target air volume requirement including the panel area air volume requirement, the horizontal working surface air volume requirement or the mine-wide air volume requirement;

[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 being 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 sound an alarm;

[0058] A three-dimensional ventilation network solution module 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] The embodiment of the present invention provides a multi-level multi-panel coordinated mine air volume control system, which includes a mine ventilation system information acquisition module, an air volume demand 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 mine ventilation system information of a multi-level multi-panel coordinated mine; the air volume demand calculation module is used to calculate the target air volume demand; 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 air volume demand 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 for alarm; the three-dimensional ventilation network solution module is used to establish a three-dimensional simulation model and perform 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 air volume demand, and safety early warning and mine ventilation system control can be performed, thereby improving the air volume control accuracy, 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 in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through 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 following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

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

[0064] Figure 2 This is a schematic diagram of a multi-level and 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 This is 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 6This is a structural schematic diagram of a multi-level and multi-panel 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 with reference to 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 merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0070] It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments 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 may be interpreted as "at the time of" or "when" or "in response to determining".

[0071] The terms "at least one", "plurality", "each", "any", etc. used in this application include "at least one", "two" or more, "plurality" or "each", "any" or "any one", "each" or "any one" as used herein.

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

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

[0074] Multi-level and multi-panel collaborative mining: refers to the collaborative 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 related technologies, multi-level, multi-panel coordinated mining is a key development direction for achieving large-scale, digital, and intelligent mining in underground mines. Mine ventilation utilizes information collection, automated decision-making, and control equipment to achieve on-demand air supply. Its core goal is to ensure on-demand air supply in mines, avoiding both insufficient and excessive air volume. Insufficient air volume can easily lead to substandard air quality, impacting the health of underground workers and causing poisoning and suffocation. Excessive air volume, on the other hand, wastes energy and increases production costs. At present, the ventilation of multi-level and multi-panel coordinated mining faces the following key problems: (1) The working faces of multi-level and multi-panel coordinated mining are numerous and dispersed, 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 entire mine is the sum of the air volume required by each working face, that is, the total air volume required for the entire mine is also dynamically changing. Traditional air volume control is generally achieved by manually controlling the status of ventilation structures (dampers, windows, etc.). It is difficult to achieve on-demand air supply for the entire mine and working faces according to the changes in the working status of the working faces, which easily leads to insufficient or excessive air volume in the entire 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 on-demand air volume distribution. If the ventilation control facilities of the production level or the panel are not set 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 of the mine. When the natural wind pressure is consistent with 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 order to address 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, and realizes precise on-demand air supply for the underground working face and the entire mine, thereby protecting the health and life safety of underground personnel and achieving energy conservation 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 by the system, the system will sound an alarm and require the workers in the relevant area to evacuate, which can effectively avoid accidents and provide guarantees for safe production in mines. After optimizing the ventilation system and eliminating the alarm, operations are resumed, forming a mechanism for optimizing and improving the ventilation system, thereby 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 conservation and consumption reduction.

[0078] The embodiment of the present application provides a multi-level multi-disk collaborative mine air volume control method, which relates to the field of mine engineering technology. The embodiment of the present application provides a multi-level multi-disk collaborative mine air volume control method that 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 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 collaborative 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, and the like. 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, and the like 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 via 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 with reference to the accompanying drawings:

[0081] Figure 1 This is an optional flow chart of a multi-level and multi-panel 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: Acquire 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.

[0083] Step S102: Calculate the required air volume of the target stope based on the mine ventilation system information;

[0084] Step S103: Calculate the target tunneling working face air volume requirement based on the mine ventilation system information. The target tunneling working face air volume requirement includes the tunneling working face air volume requirement within the panel or the independent tunneling working face air volume requirement.

[0085] Step S104: Calculate the target air volume requirement based on the target stope air volume requirement and the target excavation working face air volume requirement, where the target air volume requirement includes the panel air volume requirement, the horizontal working face air volume requirement, or the entire mine air volume requirement;

[0086] Step S105: Calculate the target fan operating frequency based on the total mine air volume requirement;

[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 implement mine air volume control and improve accuracy.

[0089] In step S101 of some embodiments, mine ventilation system information for a multi-level, multi-panel coordinated mine can be obtained via an information collector or sensor. Mine ventilation system information for a multi-level, multi-panel coordinated mine can also be obtained via other methods, without limitation. Mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters, or fan operation information. Mine ventilation system information can be transmitted to a base station or industrial computer via a transmission line. Working face operation information includes panel operation information and tunneling face operation information. Panel operation information primarily refers to the number of stopes and operation status. Operation status includes rock drilling, rock breaking (blasting or mechanical crushing, etc.), ore removal, support, filling, or suspended operations. Tunneling face operation information includes rock drilling, rock breaking (blasting or mechanical crushing, etc.), mucking, support, or suspended operations. The information collector can be a wired, fixed instrument or a wireless, mobile instrument. The information collector has built-in options, and information collection is performed by filling in information by the work 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 the operating information. Ventilation parameters include wind speed and volume, oxygen concentration, toxic and harmful substance concentration, 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 for information collection include panel areas, excavation working faces, horizontal air intake and return lanes, and the mine's total air intake and return shafts. Mine climate parameters include atmospheric pressure, temperature, humidity, etc., which are collected through corresponding sensors, and the collection locations are the mine's total air intake and return shafts and horizontal air intake and return shafts, etc. Fan operation information (fan operating 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, 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, it has ordinary dampers, automatic regulating dampers, panel return air lanes, stopes, excavation working faces and panel air intake lanes. The ventilation network includes the mine-wide air intake and return shafts, horizontal air intake and return shafts, panel air intake and return shafts, excavation shafts and stopes; due to the multiple production levels and panels, the ventilation network is relatively complex. The ventilation power equipment includes main fans and local fans, etc. The main fans serve the entire mine or one wing, and the local fans serve a single mining working face. The ventilation control equipment includes dampers, regulating dampers and regulating windows, etc., which are used to adjust the air volume of each production level or panel. The layout of the information collector and ventilation equipment is as 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 adjustment 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 level area base station is connected to the early warning instrument, climate parameter sensor, wind speed sensor, automatic adjustment damper and automatic adjustment fan, the air supply 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 stope is calculated based on the mine ventilation system information, which may include but is not limited to steps S201 to S205.

[0092] Step S201: Determine the stope operation status and stope type based on mine ventilation system information;

[0093] Step S202: When the stope operation state is rock drilling, mechanical rock breaking, ore extraction, support, or backfilling, the target stope air volume requirement is calculated based on the minimum air volume per person per minute, the number of workers on the working face, the stope cross-sectional area, the stope dust exhaust wind speed, the unit power air volume index, 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 based on 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;

[0095] Step S204: When the stope operation state is blasting and the stope type is chamber type, the target stope required air volume is calculated based on the ventilation time, the amount of explosives for a single blast, the stope chamber volume, 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 air volume required 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. The target mine air volume requirement can be calculated based on the minimum air volume per person 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 air volume requirement can be calculated based on the ventilation time, the amount of explosives in a single blasting, the distance from the center of the blasting smoke position to the return air tunnel and the cross-sectional area of ​​the mine. The calculation formula for the target mine air volume requirement is: Where Q c The air volume required for the target stope (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 smoke position to the return air channel after 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 blast smoke. The target stope air volume can be calculated based on the ventilation time, the amount of explosives in a single blast, the stope chamber volume and the turbulent diffusion coefficient. The calculation formula for the target stope air volume is: Where Q c The target stope 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), V is the volume of the stope chamber (m 3 ), K w is the turbulent diffusion coefficient. When the stope operation status is suspended, there is no need to supply air to the stope, and the target stope required air volume can be set to 0.

[0098] In some embodiments, in step S202, the target stope air volume requirement is calculated based on the minimum air volume requirement per person per minute, the number of people working on the working face, the wind cross-sectional area of ​​the stope, the dust exhaust wind speed of the stope, the air volume per unit power index, 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 face;

[0100] Calculate the air volume required for dust removal in the mine based on the cross-sectional area of ​​the mine and the 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 area can be calculated based on the minimum air volume required per person per minute and the number of workers on the working face. The calculation formula for the breathing air volume required by the workers in the mining area 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 The minimum air volume 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 cross-sectional area of ​​the mine and the dust removal wind speed of the mine, the required air volume for removing dust in the mine is calculated. The calculation formula for the required air volume for removing dust in the mine is: Q2 = S c v, where Q2 is the air volume required for dust removal in the mining area (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 set to 0.15, and in a tunnel-type mining area or excavation working face, v can be set to 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 air volume per unit power (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 to be selected as the target mining area 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 mining dust removal Q2 and the air volume required for mining exhaust gas removal Q3.

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

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

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

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

[0108] When the excavation face is in blasting operation mode, the required air volume of the target excavation face is calculated based on the ventilation time, tunnel length, explosive quantity for a single blast, 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 tunneling face air volume requirement may include the air volume requirement for a tunneling face within a disk area or the air volume requirement for an independent tunneling face, where the independent tunneling face is independent of the disk area. The main operating states of a tunneling face include rock drilling, blasting, mechanical rock breaking, mucking, support, filling, or suspended operations, and the air volume requirements vary depending on the operating state. The operating state of the tunneling face can be determined based on the mine ventilation system information, and then the operating state of the tunneling face can be judged. When the tunneling face operating state is rock drilling, mechanical rock breaking, ore removal, or support, the air volume required for breathing of tunneling face workers, the air volume required for dust removal from the tunneling face, and the air volume required for exhaust gas removal from the tunneling face are calculated. It is understandable that the breathing air volume required by workers on the tunneling face can be calculated using a calculation method similar to the breathing air volume required by workers on the mining site, the dust removal air volume required on the tunneling face can be calculated using a calculation method similar to the dust removal air volume required on the mining site, and the exhaust gas removal air volume required on the tunneling face can be calculated using a calculation method similar to the exhaust gas removal air volume required on the mining site. Then, a maximum value is selected from the second air volume required to be selected as the target tunneling face air volume required. The second air volume required to be selected includes the breathing air volume required by workers on the tunneling face, the dust removal air volume required on the tunneling face, and the exhaust gas removal air volume required on the tunneling face. When the tunneling face is in blasting operation mode, the target tunneling 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. The calculation formula for the target tunneling face air volume required is: Where Q j is the required air volume for the target excavation working 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 tunneling face operation state is suspended, there is no need to supply air volume to the tunneling face, and the target tunneling face required air volume can be set to 0.

[0111] In some embodiments, in step S104, the target required air volume is calculated based on the target stope required air volume and the target tunneling working face required air volume, 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 stope and the required air volume of the excavation working face within 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 tunneling 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 working face air volume requirement, wherein the target air volume requirement can include the panel air volume requirement, the horizontal working 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 working face air volume requirement in the panel. For example, the target stope air volume requirement and the excavation working 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 stope, Q j is the required air volume of the excavation working face within 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 together to obtain the required air volume of the horizontal working face. Finally, the required air volume of the entire 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 together to obtain the required air volume of the entire mine, where the calculation formula for the required air volume of the entire mine is: Where Q k is the air volume required for the entire mine, U is the total number of horizontal working surfaces, Q su is the air volume required for the u-th horizontal working surface.

[0116] In some embodiments, in step S105, the target fan operating frequency is calculated based on the total mine air volume requirement, which may include but is not limited to the following steps:

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

[0118] Calculate the average density of the target wells and lanes based on the density of measuring points along the way, the height difference between measuring points along the way, and the vertical height difference of the wells and lanes. The average density of the target wells and lanes includes the average density of the intake wells and lanes or the average density of the return air wells and lanes.

[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, the acceleration of gravity and the vertical height difference of the shaft;

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

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

[0122] In some embodiments, the wind turbine operating condition parameters include wind pressure parameters and air 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. The calculation formula for the density of measurement points along the way is: Where ρ is the density of measuring points along the way (kg / m 3 ), P is the atmospheric pressure (Pa), and w is the air temperature (°C). Then, based on the density of measuring points along the way, the height difference between measuring points along the way, and the vertical height difference of the wells and lanes, the target well and lane average density is calculated. The target well and lane average density may include the average density of the air intake well and lane or the average density of the return air well and lane, that is, the average density of the air intake well and lane or the average density of the return air well and lane can be calculated using the calculation formula of the target well and lane average density. The calculation formula of the target well and lane average density is: Where, 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 acceleration of gravity, and the vertical height difference of the shaft and tunnel. The calculation formula of the 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 inlet 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 (9.8m / 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 subsequently calculate the target fan pressure or main fan pressure. The different densities in the inlet and return air shafts lead to the generation of natural wind pressure. When the vertical height difference between the inlet and return air shafts in the mine is different, a virtual section with a smaller vertical height difference can be added on the surface to make the vertical depth of the inlet and return air shafts the same. Then, the target fan pressure is calculated based on the natural wind pressure, ventilation network wind resistance, total mine air volume, main fan device resistance and outlet dynamic pressure loss. The calculation formula for the target fan pressure is: H f =RQ k 2 +h r +h v -H n , where H f is the target fan pressure (Pa), R is the ventilation network wind resistance (N·s 2 / m 8 ), Q k The air volume required for the entire mine (m 3 / s), h r Resistance of main fan device (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 of them are fixed values ​​or can be considered as fixed values. Natural wind pressure varies with local natural climate changes. Finally, the target wind turbine operating frequency is calculated based on the target wind turbine pressure, current wind turbine pressure and current wind turbine operating frequency. The calculation formula for the target wind turbine 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 entire mine area, the air volume of the main fan is controlled according to the air volume required by the entire 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 air volume required by 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 channel of the panel return air side 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 air volume required by 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 entire mine area, the main fan can be controlled according to the required air volume of the entire mine and the target fan operating frequency. For example, the intelligent control of the air volume of the entire 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 operating condition calculation method according to the required air volume of the entire 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 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 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 automatic damper, thereby realizing intelligent control of the air volume at each level. When the control area is a panel, the air volume can be controlled by automatically adjusting the damper in the return air duct on the panel return air side according to the panel's required air volume. Exemplarily, each panel's return air duct is equipped with an automatic damper. After the industrial computer calculates the required air volume of the panel 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, thereby realizing intelligent control of the air volume of each panel. When the control area is an excavation working surface, the air volume of the local fan can be controlled according to the target excavation working surface required air volume. For example, intelligent control of excavation working air volume is achieved through intelligent control of local fans. The local fan fans are equipped with variable frequency controllers. After the industrial computer calculates the required air volume and the corresponding fan operating frequency of the target excavation working face based on the working face operation information collection and the built-in required air volume calculation method, the industrial computer issues a local fan variable frequency control instruction to realize 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, early warning devices are installed in the mine's air intake tunnels, horizontal air intake tunnels, panel areas, and independent tunneling working faces. These early warning devices can be integrated with the operational information collection device in the real-time information collection system, forming an operational information collection and early warning device. After air volume control is implemented, the air quality within the control area can be assessed. If the concentration of toxic and hazardous substances or oxygen in the control area does not meet operational requirements, an alarm signal is generated, which is used to control the early warning device to issue an alarm. For example, based on the real-time collection of information such as air volume, toxic and hazardous substance concentration, and oxygen concentration, when the air volume, toxic and hazardous substance concentration, or oxygen concentration of an independent tunneling working face, panel area, or the entire mine does not meet operational requirements, the air volume of the entire mine, horizontal area, panel area, and tunneling working face is automatically controlled to increase the air volume. If the air volume, toxic and hazardous substance concentration, or oxygen concentration still does not meet operational requirements after adjustment, an alarm is issued for the independent tunneling working face, panel area, or the entire mine, depending on the situation. In the event of an alarm at an independent tunneling face, if the air volume, toxic and hazardous substance concentration, or oxygen concentration still does not meet operational requirements after air volume control, the corresponding independent tunneling face's operational information collection and early warning instrument will trigger an alarm, evacuate the independent tunneling face's personnel, and suspend operations. In the event of an alarm at a panel area, if the air volume, toxic and hazardous substance concentration, or oxygen concentration still does not meet operational requirements after air volume control, the corresponding panel area's operational information collection and early warning instrument will trigger an alarm, evacuate the panel area's personnel, and suspend operations. In the event of an alarm at the entire mine, if the air volume of the entire mine seriously does not meet operational requirements after control (for example, 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 trigger an alarm, evacuate underground personnel, and suspend operations. Alarms generated by independent tunneling faces, panel areas, or the entire mine can require manual technical intervention. Technicians can use a real-time three-dimensional ventilation network solution system to develop solutions and improve and transform the multi-level, multi-panel mine ventilation system. Once the alarm is eliminated, operations can be resumed and related operations can be re-engaged.

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

[0133] Modeling of multi-level and multi-panel coordinated mines to obtain a three-dimensional simulation model;

[0134] Input the mine climate parameters into the 3D simulation model and perform 3D ventilation network calculation to obtain the 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 coordinated mine can be modeled first to obtain a three-dimensional simulation model. Then, the mine climate parameters obtained by information collection can be input into the three-dimensional simulation model, and a real-time and accurate three-dimensional ventilation network solution can be 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 controlled. Furthermore, 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 mine intelligent ventilation system can be established and operated, primarily including the activation of the main fans and the operation of ventilation control facilities. Information collection and transmission are then performed to calculate the required air volume and main fan operating conditions, generating a required air volume threshold range. Intelligent control is then performed based on the required air volume to determine whether the measured air volume falls within the target air volume threshold range. If the measured air volume does not fall within the target air volume threshold range, intelligent control is performed again. Otherwise, the air quality is determined to meet operational requirements. If this is still not the case after intelligent control, an alarm is issued, and manual technical intervention is initiated.

[0138] In some embodiments, this embodiment takes into account the operating status of the working face and the influence of natural wind pressure by means of information collection, intelligent control, early warning, and three-dimensional ventilation network solution, and realizes accurate on-demand air supply for underground working faces and the entire mine. It can avoid insufficient air volume leading to air quality that does not meet the requirements, posing a threat to the health and life safety of underground personnel, and it can also avoid excessive air volume, which causes waste of energy. This embodiment has an alarm function. When the air volume and air quality of an independent excavation working face, a panel area, or the entire mine still cannot meet the operating requirements after the system's intelligent regulation, the system will sound an alarm, requiring the suspension of operations and the evacuation of workers in the relevant areas, which can effectively avoid accidents. Then, manual technical intervention is 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-panel 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 and multi-panel coordinated mine, and then calculate the target mining area air volume requirement based on the mine ventilation system information, and calculate the target excavation working face air volume requirement based on the mine ventilation system information, and then calculate the target air volume requirement based on the target mining area air volume requirement and the target excavation working face air volume requirement, and calculate the target fan operating frequency based on the air volume requirement of the entire mine, and finally perform air volume control based on the target air volume requirement and the target fan operating frequency, so that the mine air volume control can be achieved by calculating the air volume requirement, 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 accurate on-demand air supply of 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. It also has an alarm function, which can effectively avoid accidents caused by ventilation not meeting requirements, forms a mechanism for optimizing and improving the ventilation system in the production process, and improves the inherent safety level of the ventilation system.

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

[0141] Mine ventilation system information collection module 601, which is used to obtain 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] Air volume requirement calculation module 602, which is used to calculate target air volume requirements based on mine ventilation system information. The target air volume requirements include panel area air volume requirements, horizontal working surface air volume requirements, or mine-wide air volume requirements.

[0143] The fan operating condition calculation module 603 is used to calculate the target fan operating frequency based on the required air volume of the entire 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 sound an 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-panel coordinated mine air volume control system provided in this embodiment includes a mine ventilation system information collection module 601, an air volume demand 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 collection module can be used to obtain mine ventilation system information for 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. For example, information collection devices or sensors can be used to collect working face operation information, ventilation parameters, mine climate parameters, fan operation information (fan operating status and parameters), and other information. After collection, the information is transmitted to an industrial computer in an intelligent control center. Based on the mine ventilation system information, the air volume demand calculation module can be used to calculate a target air volume demand. The target air volume demand includes a pan air volume demand, a horizontal working face air volume demand, or a mine-wide air volume demand. Based on the required air volume for the entire 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 for the independent tunneling working face, each panel, each level, and the entire mine based on real-time collected information and built-in calculation methods, and calculates the main fan air volume, wind pressure, and operating frequency considering the influence of natural wind pressure. Based on the calculation results, the target air volume threshold range for the independent tunneling working face, each panel, each level, and the entire mine is generated. The target air volume threshold range is 100% to 120% of the required air volume. The air volume can be controlled by the equipment parameter control module based on the target required air volume and the target fan operating frequency. For example, based on the target air volume threshold range and the target fan operating frequency, the air volume for the entire mine, level, panel, and tunneling working face can be intelligently controlled on demand by controlling the main fan operating frequency, automatically adjusting the damper, automatically adjusting the air window, and the local fan operating frequency. Furthermore, based on information collection, a determination is made as to whether the air volume for the entire mine, the panel area, and the independent excavation working face is within the target air volume threshold range. If so, an air quality determination is performed. If not, ventilation control equipment is re-adjusted. The air volume for the entire mine, the panel area, and the independent excavation working face is controlled by controlling the main fan operating frequency, automatic damper adjustment, automatic air window adjustment, and local fan operating frequency. In air quality determination, based on information collection, a determination is made as to whether the air quality (concentration of toxic and hazardous substances, oxygen concentration) of the panel area and the independent excavation working face meets operational requirements. If the air quality does not meet operational requirements, the target air volume threshold range is raised by 10%, and ventilation control equipment is re-adjusted. If the air volume for 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 operational requirements, the ventilation system will remain 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. For example, when the air volume or air quality of the panel area or independent tunneling working face still cannot meet the operating requirements after automatic intelligent control, the early warning instrument of the relevant panel area and independent tunneling working face will issue an alarm, evacuate the personnel of the panel area or independent tunneling working face, and immediately suspend the operation. After automatic intelligent control, when the air volume of the entire mine seriously does not meet the operating requirements (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 and evacuate 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 working faces, panels or the entire mine. Technicians 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-panel coordinated mine air volume control system provided by the embodiments of the present invention includes a mine ventilation system information acquisition module, an air volume demand 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 mine ventilation system information of a multi-level multi-panel coordinated mine; the air volume demand calculation module is used to calculate the target air volume demand; 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 air volume demand 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 for 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 by calculating the air volume demand, 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 are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope 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: Acquiring mine ventilation system information of a multi-level, multi-panel coordinated mine, wherein the multi-level, multi-panel coordinated mine includes a ventilation network, ventilation power equipment, and ventilation control equipment, wherein the mine ventilation system information includes working face operation information, ventilation parameters, mine climate parameters, or fan operation information; Calculating the target mine air volume requirement according to the mine ventilation system information; specifically comprising: determining the mine operation status and mine type according to the mine ventilation system information; when the mine operation status is rock drilling, mechanical rock breaking, ore extraction, support or filling, calculating the target mine air volume requirement according to the minimum air volume per person per minute, the number of workers on the working face, 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 operation status is blasting and the mine type is a tunnel type, calculating the target mine air volume requirement according to the ventilation time, the amount of explosives for a single blast, the distance from the center of the blast smoke position to the return air lane and the mine cross-sectional area; when the mine operation status is blasting and the mine type is a chamber type, calculating the target mine air volume requirement according to the ventilation time, the amount of explosives for a single blast, the mine chamber volume and the turbulent diffusion coefficient; when the mine operation status is suspended operation, setting the target mine air volume requirement to 0; Calculating the target tunneling working face air volume requirement based on the mine ventilation system information, wherein the target tunneling working face air volume requirement includes the tunneling working face air volume requirement within the panel area or the independent tunneling working face air volume requirement; Calculate the target air volume requirement based on 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; specifically, calculate the panel air volume requirement based on the target stope air volume requirement and the excavation working face air volume requirement in the panel; calculate the horizontal working face air volume requirement based on the panel air volume requirement and the independent excavation working face air volume requirement; calculate the whole mine air volume requirement based on the air volume requirements of multiple horizontal working faces; Calculate the target fan operating frequency according to the total mine air volume requirement; specifically include: calculating the density of measuring points along the way according to the atmospheric pressure and air temperature; calculating the target shaft and tunnel average density 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 target shaft and tunnel average density includes the average density of the intake shaft and tunnel or the average density of the return air shaft and tunnel; calculate the natural wind pressure according to the average density of the intake shaft and tunnel, the average density of the return air shaft and tunnel, the acceleration of gravity and the vertical height difference of the shaft and tunnel; calculate the target fan pressure according to the natural wind pressure, the wind resistance of the ventilation network, the total mine air volume requirement, the resistance of the main fan device and the outlet dynamic pressure loss; calculate the target fan operating frequency according to the target fan pressure, the current fan pressure and the current fan operating frequency; 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 target stope air volume requirement is calculated based on the minimum air volume per person per minute, the number of people working on the working face, the wind cross-sectional area of ​​the stope, the dust exhaust wind speed of the stope, the air volume per unit power index and the total operating power of the diesel equipment, including: Calculate the breathing air volume required for workers in the mining area based on the minimum air volume required per person per minute and the number of workers on the working face; Calculating the required air volume for dust removal in the mine based on 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 based on 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 requirement to be selected includes the air volume required for breathing of the mine workers, the air volume required for removing dust from the mine, and the air volume required for removing exhaust gas from the mine.

3. The method according to claim 1, characterized in that 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 tunneling working face based on the mine ventilation system information; When the tunneling face is in the state of rock drilling, mechanical rock breaking, mining or support, the required air volume for breathing of tunneling face workers, the required air volume for dust removal of tunneling face and the required air volume for exhaust gas removal of tunneling face are calculated; Selecting a maximum value from a second set of air volume requirements as the target tunneling face air volume requirement, the second set of air volume requirements including the air volume required for breathing of tunneling face workers, the air volume required for dust removal from the tunneling face, and the air volume required for exhaust gas removal from 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 blast, 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.

4. The method according to claim 1, wherein The air volume control according to the target required air volume and the target fan operating frequency includes: When the control area is the entire mine area, the air volume of the main fan is controlled according to the air volume required by the entire 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, the air volume is controlled by automatically adjusting the damper on the return air channel of the panel return air side according to the required air volume of the panel; When the control area is the excavation working face, the air volume of the local fan is controlled according to the air volume required by the target excavation working face.

5. The method according to claim 1, wherein The method further comprises: After the air volume is controlled, if the concentration of toxic and harmful substances or the 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.

6. The method according to claim 1, characterized in that The method further comprises: Modeling of multi-level and multi-panel coordinated mines to obtain a three-dimensional simulation model; Inputting the mine climate parameters into the three-dimensional simulation model and performing a 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.

7. A multi-level multi-panel coordinated mine air volume control system applied to the method according to any one of claims 1 to 6, 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-panel coordinated mine, the multi-level, multi-panel coordinated mine including a ventilation network, ventilation power equipment, and ventilation control equipment, the mine ventilation system information including 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 a target air volume requirement based on the mine ventilation system information, the target air volume requirement including the panel area air volume requirement, the horizontal working surface air volume requirement or the mine-wide air volume requirement; 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 being 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 sound an alarm; A three-dimensional ventilation network solution module 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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