109 results about "Underground mine ventilation" patented technology

The invention particularly relates to an underground ventilation system, and belongs to the technical field of ventilation. The underground ventilation system comprises an air duct and a plurality of sliding rail assemblies. Each sliding rail assembly comprises a sliding rail part, a sliding part and a guide ring, the sliding rail parts of the multiple sliding rail assemblies are in butt joint in sequence, guide grooves are formed in the left side and the right side of each sliding rail part respectively, the guide grooves penetrate through the sliding rail parts in the length direction of the sliding rail parts, each sliding part comprises two oppositely-arranged wall parts, the sliding rail parts are arranged between the two wall parts, and the wall parts are rotationally connected with pulleys. The pulley is contained in the guide groove, and the guide ring is arranged corresponding to the sliding part and connected to the sliding part. The air channel sequentially penetrates through the guide rings. The system has the advantage that the air duct position is convenient to adjust.

The utility model discloses underground coal mine ventilation equipment, and relates to the technical field of coal mine ventilation. Comprising a barrel, a diffusion barrel is arranged at one end of the barrel, and a rotatable impeller is arranged in the barrel; a transmission assembly is arranged in the barrel and comprises a sliding plate capable of sliding relative to the barrel, a cleaning mechanism is arranged at the position, close to the impeller, of the sliding plate and comprises a guide seat and a limiting spring, the guide seat is fixedly connected to the sliding plate, a sliding rod slidably penetrates through the side face of the guide seat, and an elastic block is arranged at the end, close to the impeller, of the sliding rod. The sliding rod is sleeved with the limiting spring, one end of the limiting spring is connected with the guide base, and the other end of the limiting spring is connected with the elastic block. In the initial state, the elastic blocks abut against the inclined blades on the impeller. The self-adaptive cleaning device can be used for cleaning the blades in a self-adaptive manner, and normal flowing of airflow is guaranteed; the problems that the ventilation effect is reduced and the energy consumption is greatly increased in the operation process of underground ventilation equipment are solved.

The invention discloses a mining intelligent ventilation scheduling decision-making system based on wind network calculation, and relates to the technical field of mining equipment, and the system comprises a data collection module which is used for collecting ventilation data of a whole mine; the wind network resolving module is used for reading the whole mine ventilation data in real time, carrying out wind network resolving and simulating the mine ventilation condition in real time to obtain a mine wind demand result; the data analysis module is used for analyzing the whole mine ventilation data and the mine wind demand result data; performing wind network diagnosis according to the underground roadway topological structure, and obtaining an optimization strategy according to a wind network diagnosis result; and the linkage control module is used for controlling automatic regulation and control of related equipment according to the optimization strategy. According to the invention, underground ventilation parameters are collected in a unified manner, wind network resolving data are analyzed in a unified manner, and ventilation facilities and equipment are subjected to linkage control, so that the purposes of supplying wind according to needs and controlling wind in catastrophe are achieved.

The invention provides an underground coal mine ventilation control method and device, electronic equipment and a storage medium, and belongs to the technical field of mine ventilation. The method comprises the steps that the type and concentration characteristics of harmful gas in a target area are determined according to data collected by a biosensor array; determining time sequence data of the harmful gas according to the concentration of the harmful gas, and determining a target concentration change rate of the harmful gas according to the time sequence data; according to the concentration of the harmful gas, the target concentration change rate and the current underground acoustic wave characteristics of the coal mine, the target air volume of the target area is determined; according to the target air volume of the target area, the ventilation resistance of the target area and the current opening degree of the ventilation valve, the opening degree of the ventilation valve is controlled, and the ventilation air volume is determined. According to the coal mine underground ventilation control method and device, the electronic equipment and the storage medium, the ventilation quantity can be accurately and timely adjusted.

The present application discloses a method, device, and apparatus for mixed air volume regulation in a mine ventilation system. The method comprises: obtaining a ventilation network model of the mine ventilation system; performing air volume distribution calculations on the ventilation network model based on a ventilation network solution method, and adjusting the ventilation network model based on the air volume distribution calculation results until the simulated operating conditions of the fans in the ventilation network model match the actual operating conditions; generating at least one candidate air volume regulation scheme based on the underground ventilation air volume demand and a set optimization model corresponding to the mine ventilation system; determining the optimal air volume regulation scheme based on the at least one candidate air volume regulation scheme and the underground ventilation air volume demand; and setting the optimization model as an air volume regulation mixed optimization model, wherein the air volume regulation mixed optimization model is a linear mixed integer programming model, which greatly reduces the model's variable scale and solution complexity, thereby improving the reliability of underground ventilation regulation.

The invention belongs to the technical field of mine ventilation management and control, and particularly relates to an intelligent mine ventilation management and control method and system, and the method comprises the following steps: S1, data perception and fusion: collecting multi-source heterogeneous data from a ventilation facility, an environment sensor and a personnel positioning system through a multi-protocol data gateway, and generating a standardized data flow; s2, constructing and updating a digital twinborn body: driving and constructing the digital twinborn body of the mine ventilation system based on the standardized data flow; s3, intelligent deduction and decision making; s4, strategy execution and closed-loop control are carried out; and S5, edge autonomy. The heterogeneous data is integrated through the multi-protocol data gateway, and the standardized data stream is generated, so that a unified and high-quality data basis is provided for subsequent analysis, and the problem of information islands is solved. And the digital twin is dynamically calibrated based on real-time and feedback data, so that the simulation precision is remarkably improved, and the underground ventilation condition can be reflected more truly.

The invention relates to the technical field of mining underground ventilation, in particular to a mining underground ventilation device which comprises a main exhaust pipeline, and an opening and closing air door is provided with blades through a shaft body. A supporting telescopic rod is installed on the inner wall of the branch pipeline, a moving frame is installed at one end of the supporting telescopic rod, a sliding groove is formed in the outer wall of one side of the moving frame, a sliding connecting rod is connected into the sliding groove in a semi-embedded mode, and one end of the sliding connecting rod is movably connected with one side of a blade through a pin shaft; a self-locking assembly is arranged between the fixed end of the supporting telescopic rod and the outer wall of one side of the movable frame, and through the arrangement of the self-locking assembly, automatic locking of the blades in the closed state is achieved through the adsorption effect of a magnetic suction plate on a connecting shaft body of a first connecting rod and a second connecting rod; the problem that the air door is opened accidentally due to the fact that a traditional thread or buckle fixing mode is prone to loosening under the impact of airflow is solved, and the sealing reliability and the operation safety of the air door under the complex working condition of a mining mine are remarkably improved.

The utility model discloses a mine underground ventilation safety monitoring device, which relates to the technical field of ventilation safety monitoring and comprises a ventilation box and a connecting assembly arranged on the ventilation box. The mounting assembly is arranged on the ventilation box; the exhaust assembly is arranged on the ventilation box; the sliding groove assembly is arranged on the ventilation box; the filtering assembly is arranged on the sliding groove assembly; the sleeve rope assembly is arranged on the ventilation box; through the arrangement of the connecting assembly and the exhaust assembly, under the action of the exhaust fan, underground air can enter the connecting pipe from the suction port and is exhausted to the outside through the ventilation cavity and the exhaust pipe, then circulation of the underground air and the outside can be achieved, and the influence of dust caused by human activities on components is greatly reduced; the service life of components is prevented from being shortened, meanwhile, dust in air is monitored through the arranged air quality detector, and underground ventilation can be conducted in time.

The present application aims to provide a kind of coal mine underground damping type regulating air door and its using method, belong to coal mine underground ventilation technical field, including air door body, the window frame is equipped on the air door body, the outer end of air door body is equipped with shell, one end of window frame is hinged with air door body by hinge, the other end is connected with shell by window lock, a plurality of layers of damping net are equipped between window frame and shell, the outside of damping net is equipped with inner frame body, the upper and lower ends of window frame are equipped with slide rail, the slide rail includes the outer slide rail located in the outside of air door body and the inner slide rail located in the inside of air door body, the inner frame body is slidably connected with slide rail, the bottom of the inner frame body is equipped with control assembly.Damping type regulating air door, air flow area is large, and is flexible to block, air flow is not easy to penetrate to the coal body around air door, the probability of coal spontaneous combustion accident is greatly reduced, and the air volume regulating range is large, especially suitable for the area that air volume changes greatly.

The present application belongs to the technical field of underground ventilation system regulation and control, and specifically provides an underground intelligent damper adaptive regulation method and system, the method mainly comprising: obtaining underground real-time monitoring data, the monitoring data including the damper opening original sequence, the wind speed original sequence, and the air pressure original sequence; pre-processing the damper opening original sequence and the wind speed original sequence to obtain a steady-state opening sequence and an effective wind speed sequence; correlating the steady-state opening sequence and the effective wind speed sequence to generate a characteristic parameter set that characterizes the dynamic equilibrium relationship between the opening and the wind speed; and regularizing the characteristic parameter set to generate a characteristic parameter set that adapts to the air pressure control logic. The present application can capture the coupling relationship between underground wind speed, air pressure, and damper opening in real time, and adaptively match the control strategies under different working conditions, thereby improving the regulation accuracy, accelerating the response speed, ensuring the stable operation of the underground ventilation system, and reducing safety risks.

The utility model relates to the technical field of underground coal mine ventilation, in particular to a connecting structure of a self-resetting air door frame and an air door plank, which comprises an air door frame and an air door plank, the air door frame is connected with the air door plank through a connecting piece, and the connecting piece comprises a mounting plate fixed on the air door frame. A pair of hinge lugs is arranged on the mounting plate, an outward-extending patch is hinged between the two hinge lugs through a hinge shaft, and the outward-extending patch is fixedly connected with the air door plate; a limiting piece is arranged between the two hinge lugs and located on the side, away from the air door frame, of the hinge shaft. The air door is simple in structure, low in manufacturing cost and convenient to install and maintain, the opening angle of the air door plate can be effectively controlled, the phenomenon that the opening angle of the air door plate is too large and cannot be automatically reset is prevented, and the potential safety hazard of air flow short circuit accidents caused by the fact that an air door is not automatically closed is eliminated.

The underground coal mine upper corner gas ventilation device comprises an underground coal mine ventilation pipe and a plug, the plug is assembled at the front end of the underground coal mine ventilation pipe, an adjusting assembly is assembled on the outer wall of the underground coal mine ventilation pipe, and the plug is assembled at the output end of the adjusting assembly. According to the underground coal mine ventilation pipe, the main through hole and the side through holes are designed, air extraction from multiple angles is achieved, the problem that due to single-face air extraction, the flowability of air on the other side of the pipe is poor is solved, the air suction efficiency can be effectively improved, and the air extraction efficiency is improved. And a pointed-end plate is further designed, when the pointed-end plate is separated from the plug, air exhaust work can be completed through the main through hole, when impurities need to be removed from the main through hole, the plug is driven by the self-locking air cylinder to move, the pointed end is inserted into the main through hole, then the impurities in the main through hole can be pushed out and removed, the blocking frequency is reduced, and the service life of the device is prolonged.

The utility model relates to the technical field of coal mine underground ventilation equipment, and particularly discloses a double-fan automatic switching intensive installation device which comprises a roadway air duct used for being connected with a tunneling working face ventilation system. The section of the air duct switching device is trapezoidal, the small end of the air duct switching device is communicated with the roadway air duct, and the large end of the air duct switching device is communicated with the double-fan box frame; the double-fan box frame comprises a first-layer box frame and a second-layer box frame which are stacked up and down, and fan fixing bases are arranged in the first-layer box frame and the second-layer box frame respectively and used for installing a main fan and a standby fan; the triangular air duct is arranged in the air duct switching device, an air outlet of the triangular air duct is communicated with the roadway air duct, and two air inlets of the triangular air duct are communicated with the first-layer box frame and the second-layer box frame respectively; according to the double-fan automatic switching intensive mounting device, through the design of one-key fan switching, centralized mounting and fixing, stable structure, easy maintenance and the like, the effects of improving the working efficiency, reducing the safety risk and facilitating moving and centralized management are achieved.

The application belongs to the technical field of mine ventilation, and discloses a coal mine underground ventilation adjusting device, which comprises a water storage box. Through cooperation of the interception assembly and the exhaust assembly and other structures, the exhaust assembly drives the air in the mine and the water sprayed by the water supply assembly to flow to the side of the filter plate, and drives the spiral disc to rotate, and the coal powder contained in the air is retained on the side of the filter plate, the spiral disc rotates to concentrate the coal powder and water to the middle part of the filter plate and falls into the inside of the storage box, and when the coal powder in the storage box is excessive, the coal powder will be washed away by the water, the connecting rod will also drive the guide ring to descend and scratch the inner wall of the collecting pipe, and the mixture of the coal powder and water adhered to the inner wall of the collecting pipe will also fall into the inside of the storage box, so that the descending speed of the storage box is accelerated, and the working efficiency of the device is improved, and the water supply assembly also re-lifts the bidirectional telescopic rod to the initial state, so that the device can reciprocatingly clean and collect the coal powder.

The invention relates to the technical field of coal mine underground ventilation, in particular to fully mechanized caving retracement working face full wind pressure ventilation equipment which comprises a ventilation box and an air supply pipe, the ventilation box comprises a flexible belt, two mounting plates and a plurality of guide rollers, the two mounting plates are symmetrically arranged, and the guide rollers are arranged between the two mounting plates along the four side edges of the two mounting plates in an array mode; the two ends of each guide roller are rotationally connected with the mounting plates correspondingly, the flexible belt is wound around the guide rollers, and a box body inner cavity is formed between the flexible belt and the two mounting plates. The ventilation box composed of the mounting plate, the guide rollers and the flexible belt is horizontally arranged, so that the span of the two ends of the ventilation box is enough to cover the form of a working face after fully mechanized caving retracement, in addition, the multiple air outlets in the flexible belt are arranged at equal intervals, it is guaranteed that air can be discharged from the four sides of the ventilation box, the ventilation range is not limited, and the driving mechanism drives the driving rollers to rotate, so that the ventilation efficiency is improved. The flexible belt is driven to rotate around the guide roller, so that the position of the air outlet is dynamically changed, and the ventilation coverage is effectively expanded.

The application provides a coal mine main fan frequency converter speed regulation method based on random wind speed field prediction. First, wind measuring points are arranged in underground stoping working faces, tunneling working faces and air shafts. According to various data monitored by the wind measuring points, information prediction is carried out, and a graph neural network is established to calculate air supply. According to the real-time air volume calculated by the graph neural network, the relationship between the control frequency of the main fan frequency converter and the real-time air volume is obtained, and the frequency converter control frequency is calculated. The beneficial effect is that the present application takes the random field as the theoretical basis, takes each key ventilation detection in the underground as the vertex of the random field, takes the ventilation detection result as the attribute of the vertex, establishes an underground ventilation control random field model, then establishes a field data prediction model to predict the future information of the wind field, thereby guiding the ventilation regulation of the main fan and effectively improving the response speed of the ventilation control.

The invention discloses a method, a system, equipment and a medium for determining underground coal mine ventilation volume, and relates to the technical field of coal mine ventilation management.The method comprises the steps that when a minimum loop is searched, the priority weight of each remaining branch is determined with the level of a breadth-first spanning tree of a tree node as a weight factor, searching is started from the remaining branch with the minimum weight, and a plurality of loops are constructed; extracting a closed loop with the least residual branches; meanwhile, dynamic weights are set according to the number of remaining branches, the loop with the minimum sum of the weights of the remaining branches is selected as the minimum loop, and it is ensured that the calculated roadway air volume is consistent with the actual value. In addition, the air flow direction is judged through the edge relation, the air volume symbol is adjusted, the abnormal direction is corrected, and the calculated air flow direction fits the reality.

1. The name of this design product: Underground mine ventilator. 2. Purpose of this design product: used for underground mine ventilation. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The invention relates to a coal mine local ventilation system health state diagnosis method and system oriented to global elements, and belongs to the technical field of coal mine underground ventilation safety monitoring. The method aims to solve the problems of isolated monitoring, passive response, one-sided diagnosis, lack of system evaluation and the like in the prior art. According to the technical scheme, the method mainly comprises the steps that global element key indexes covering ventilation network, power, monitoring, purification, regulation and control and monitoring systems are defined and collected; customizing a health degree evaluation rule for each index and calculating a score; health state diagnosis is carried out by adopting a multi-level information fusion strategy of an equipment level, a subsystem level and a system level; and finally, the visual display of the health state and the rapid and accurate traceability of unsafe factors are realized. According to the invention, systematic and foresight evaluation of the overall health state of the local ventilation system is realized, the sub-health state can be actively pre-warned, the fault source can be intelligently positioned, and the initiative and accuracy of mine ventilation safety management are significantly improved.

The invention relates to the technical field of ventilation devices, in particular to a mining underground ventilation device. Comprising a seat frame, an air duct and a servo motor which are installed on the seat frame, and further comprises a reciprocating driving system, a reciprocating frame capable of moving in a reciprocating mode in the axis direction of the air duct is installed on the reciprocating driving system in a transmission mode, the reciprocating stroke of the reciprocating frame is linearly adjustable, a shaft frame is rotatably installed on the reciprocating frame, and a set of first fan blades are rotatably installed on the shaft frame; a deflection gear is installed at the tail end of each first fan blade, and a fan shaft driven by a servo motor is rotationally installed on the inner wall of the air barrel. Through the synergistic effect of the reciprocating driving system and the fan blade deflection structure, three-dimensional expansion of the ventilation range is achieved, the reciprocating driving system converts rotary motion of the servo motor into axial reciprocating displacement of the reciprocating frame, and the first fan blades are driven to conduct periodic air sweeping action along the axis of the air duct while conducting rotary ventilation.

The present invention relates to the technical field of underground mine ventilation and provides a method for determining tunnel air volume, comprising: constructing a three-dimensional ventilation network model for an underground mine; measuring actual tunnel ventilation data, calculating tunnel frictional wind resistance, and inversely calculating the tunnel frictional resistance coefficient to correct the three-dimensional ventilation network model; online monitoring of the main tunnel wind speed and integrating it into the three-dimensional ventilation network model; correcting the online monitored wind speed of the main tunnel to the average wind speed of the entire cross-section and calculating the monitored air volume; interpolating the monitored air volume of the main tunnel into the corresponding tunnel in the three-dimensional ventilation network model, replacing the air volume calculated by the model with the monitored air volume, calculating the air volume of other tunnels using the interpolated three-dimensional ventilation network model, and inversely calculating the tunnel wind speed based on the air volume and cross-sectional area. The present invention can realize the real-time calculation of air volume using online monitoring data, greatly improving the accuracy and efficiency of tunnel air volume determination, and realizing that the accurate air volume of all tunnels can be obtained by monitoring the wind speed of the main tunnel, thereby reducing the cost of tunnel air volume determination.

The utility model discloses an underground mine ventilation device which comprises a ventilator, an air outlet pipe is arranged at the top of the front side of the ventilator, an air inlet pipe is arranged on the right side of the ventilator, a filtering piece is arranged at the end of the air inlet pipe and is designed to be of a structure with more than half of a sphere, and a fixing mechanism is arranged between the filtering piece and the air inlet pipe. According to the underground mine ventilation device, the filtering part of the more than half spherical structure is arranged, so that the filtering area is greatly increased, and compared with a traditional filtering part, the filtering efficiency is effectively improved; through the fixing mechanism with the locking ring matched with the positioning ring, the filtering piece can be rapidly mounted or dismounted only by rotating the driving rod, operation is easy and convenient, and the maintenance difficulty and time cost are reduced.

The present invention discloses a method for detecting the working conditions of an underground fan station and a monitoring device, which relates to the technical field of underground ventilation in underground mines. The present invention solves the problem that it is impossible to effectively and real-time grasp the air volume distribution situation underground, thus making it inconvenient to adjust the underground air volume. The working condition state information of the fan station located within the underground monitoring range is collected in real time through the underground fan station working condition monitoring device, and the monitored working condition state information is transmitted to the monitoring system. Through the monitoring system, it is convenient for the staff to detect the operation working conditions of the underground fan station in real time, dynamically grasp the air supply situation of the underground fan station, facilitate understanding the underground air volume distribution situation. If the air volume distribution is abnormal, a warning message is sent through the alarm module to remind the staff to adjust the air volume distribution, and a fan control command is issued through the control module, and the working condition of the fan station is adjusted in a timely manner according to the fan control command.

The utility model discloses an underground ventilation device for metal mining, and relates to the technical field of mining ventilation. The device comprises an air inlet pipeline, a ventilation fan, a filter screen and a dust blocking plate are sequentially arranged in the air inlet pipeline, a collecting box is arranged at the bottom of the filter screen, a cleaning mechanism is arranged between the filter screen and the dust blocking plate, a driving belt wheel and a threaded block are sequentially connected to a first screw of the cleaning mechanism, and a driven shaft is rotationally installed on the inner wall of the air inlet pipeline. A driven belt wheel is installed on the driven shaft, a plurality of impact rods are installed on a fixed block connected to the bottom of the driven shaft, and the impact rods impact the impact block when rotating. By means of the mode, the dust blocking plate vibrates, so that dust and solid impurities attached to the dust blocking plate fall off, the phenomenon that the dust blocking plate is blocked is avoided, the ventilation effect of the dust blocking plate is improved, and the breathing efficiency of workers in a mine is guaranteed.

The utility model relates to the technical field of ventilation devices, in particular to an underground ventilation device, which is convenient for conveying low-temperature air to the underground, improves the underground operation comfort of personnel, improves the air cleaning effect and improves the use convenience. Comprising an air pipe and a fan, and the fan communicates with the input end of the air pipe; the device comprises a cooling device, a filtering device, an adjusting device, a first box body, two sets of second box bodies and multiple sets of first heat exchange pipes, the first box body communicates with the cooling device, the cooling device is used for circularly conveying cooling water in the first box body, and the two sets of second box bodies are both installed on the inner side wall of the first box body; the two ends of the first heat exchange pipes communicate with the two second box bodies correspondingly, the left second box body communicates with the input end of the draught fan, the right second box body communicates with the filtering device, the filtering device is used for filtering air, and the adjusting device communicates with the output end of the air pipe and is used for adjusting the exhaust direction of the air pipe.

The present application discloses a method, device, and equipment for step-by-step air volume regulation of a mine ventilation system. The method comprises: obtaining a ventilation network model of the mine ventilation system; performing air volume distribution calculation on the ventilation network model based on a ventilation network solution method, and adjusting the ventilation network model based on the air volume distribution calculation result until the simulated operating conditions of the fans in the ventilation network model match the actual operating conditions; generating at least one candidate air volume regulation scheme based on the underground ventilation air volume demand and a set optimization model corresponding to the mine ventilation system; determining the optimal air volume regulation scheme based on the at least one candidate air volume regulation scheme and the underground ventilation air volume demand; and setting the optimization model as a step-by-step optimization model for air volume control based on multi-objective mixed integer programming. The optimal air volume regulation scheme for the mine ventilation system can be obtained based on the two-step ventilation optimization method, which greatly reduces the variable scale and solution complexity of the model, thereby improving the reliability of underground ventilation regulation.

The invention relates to the technical field of coal mine safety, in particular to a comprehensive safety evaluation method for an underground coal mine ventilation system based on network analysis, which comprises the following steps: performing air network calculation on a ventilation network corresponding to a to-be-evaluated mine ventilation system to obtain theoretical parameters of each node of the ventilation network, the theoretical parameters comprising a theoretical wind direction and a theoretical air volume; based on the theoretical wind direction of each node of the ventilation network, constructing a corresponding wind volume directed reachable matrix; calculating the air volume directed reachable matrix through a network analysis method, and determining a plurality of key evaluation areas of the ventilation network; and obtaining actual ventilation quantities corresponding to the plurality of key evaluation areas, and carrying out dynamic evaluation analysis processing on the to-be-evaluated mine ventilation system based on the theoretical ventilation quantities corresponding to the plurality of key evaluation areas. The problems that mine ventilation evaluation is high in cost, low in efficiency and long in consumed time are solved.

The invention relates to the technical field of coal mining, in particular to a coal mining underground ventilation and drainage device and a using method.The coal mining underground ventilation and drainage device comprises a base, a water storage tank is fixedly connected to the outer wall of the bottom end of the base, a mounting hole is formed in the outer wall of the top end of the base, and an outer plate is fixedly connected to the inner wall of one side of the mounting hole; the inner wall of the other side of the mounting hole is fixedly connected with an inner plate; the drainage mechanism is arranged on the outer wall of the outer plate; the drainage mechanism comprises a first annular pipe slidably connected to the inner wall of the outer plate, a rack is fixedly connected to the outer wall of one side of the first annular pipe, and a motor is installed on the outer wall of one side of the outer plate. In the drainage process, air is introduced into the water storage tank through the air suction pipe, accumulated water flowing and filtering are promoted, the ventilation process and the drainage process are matched with each other, the overall operation efficiency is improved, the spraying structure is in a moving state all the time, spraying and air suction are more uniform, and the air quality and the overall environment in a mine are improved.

The invention discloses an automatic adjusting system for an underground mine local fan air duct. Comprising an electric trolley, a guide rail, a sliding block, a limiting switch, an air duct, a bracket, an air duct lengthening end, a roadway top, a roadway bottom, a working face, a PLC, a gas sensor, a position sensor, a distance sensor, a pressure sensor, an infrared thermal imaging sensor, an inertia measurement unit and a human-computer interaction interface. Through cooperative work of the PLC, the artificial intelligence technology and the multi-sensor technology, the intelligent and automatic level of air duct control is improved, the air duct position and the ventilation effect can be rapidly and accurately controlled before and after blasting, and the safety of operators is ensured. The safety and the intelligent level of an underground mine ventilation system are improved, and the requirements of modern mine operation for high efficiency, accuracy and reliability of the ventilation system are met.

The invention relates to the technical field of underground mine ventilation, in particular to an underground mine roadway self-adaptive sealing air door and a using method thereof. The underground mine roadway self-adaptive sealing air door comprises an air door assembly, a hydraulic transmission mechanism and a plurality of elastic sealing assemblies; the air door assembly comprises an air door body, a door frame and a hydraulic connecting rod, the two ends of the hydraulic connecting rod are fixedly connected with the air door body and the door frame correspondingly, and the hydraulic transmission mechanism is connected with the hydraulic connecting rod and used for driving the hydraulic connecting rod to stretch out and draw back. The elastic sealing assemblies are arranged below the air door body in an array mode and connected with the air door body in a sliding mode. The elastic sealing pieces are arranged at the bottom of the air door body in an array mode, so that the height of the bottom of the air door body can be adjusted in real time according to roadway ground fluctuation in the rotating process of the air door body, and the elastic sealing pieces independently respond to local terrain changes; the problem of air leakage caused by gaps at the bottom of the air door body can be effectively solved, and durability and application range of the device are remarkably improved.