1413results about "Fire prevention" patented technology

The invention relates to the technical field of mine environmental protection and intelligent control, and discloses an intelligent dust suppression system and method for an open-pit coal mine, which are used for solving the problems of fixed spraying mode, poor real-time performance and waste of water resources in the dust suppression process of the open-pit coal mine. According to the intelligent dust suppression system and method for the open pit coal mine, a dust concentration sensor, a wind speed and direction sensor and a meteorological sensor are arranged in a mining area, real-time monitoring of a dust diffusion source and environmental parameters is achieved in combination with a video monitoring unit, and multi-source data are fused in a control system for diffusion trend prediction; according to the method, a dust high-risk area can be dynamically identified, then a targeted spraying strategy is generated according to a prediction result, and accurate control over the spraying position, the spraying time and the spraying flow is achieved, so that the problems that in the prior art, a spraying operation mode is fixed and is difficult to adapt to environmental changes are solved, the water consumption per unit time is reduced, and the working efficiency is improved. The air quality of an operation area is guaranteed, and the operation environment safety and the environmental protection standard-reaching rate are improved.

The invention discloses an intelligent integrated automatic pollution discharge, spray and dust suppression system for a coal mine tunnel, and relates to the technical field of automation. The system comprises a double-channel sensing assembly, a central controller, a mine communication link and an integrated pollution discharge spraying terminal group, the central controller obtains a dust image and a ground height image at the same time in combination with the double-channel sensing assembly, generates a roadway working condition grid map, completes dust level marking and ground height marking, extracts a dust cluster and a transition zone on the basis, and loads a pollution discharge component list. Constructing a descending chain from the outer edge of the dust cluster, selecting a ridge chain backbone, finally generating a cooperative control instruction set, issuing the cooperative control instruction set to the integrated pollution discharge spraying terminal group, and carrying out snapshot acceptance check by using a dual-channel sensing assembly after execution. According to the invention, accurate dust control, smooth sewage discharge and high resource utilization rate can be ensured, and the stability and long-term effectiveness of system operation can be maintained in a complex environment.

The invention discloses a coal mine coal dust explosion risk dynamic evaluation and explosion suppression system, which comprises a sensing module, a data processing module, a data processing module and a data processing module, wherein the sensing module is used for acquiring direct and indirect parameters of an underground environment; the central processing module is used for operating a risk assessment algorithm and generating a control instruction; the explosion suppression execution modules are distributed in pipelines and roadways of underground key nodes and are used for executing explosion suppression actions; the active chemical detection module is arranged in the main ventilation pipeline and is used for carrying out pre-chemical sampling and analysis on the inflowing air so as to judge the abnormal enrichment trend of the explosive gas; according to the system, a dynamic risk assessment system based on multi-source indirect perception and active chemical detection is constructed, and precise explosion suppression of time-space cooperation is realized. The method has the advantages of being capable of achieving early warning, dynamic evaluation and precise collaborative explosion suppression.

The invention provides a centralized dust control method and system for a driving working face, and the method comprises the steps: collecting actual measurement environment parameters of the driving working face in real time through a sensor, and carrying out the preprocessing of the actual measurement environment parameters, and obtaining the preprocessed actual measurement environment parameters; acquiring a target environment parameter of the driving working face, and determining an absolute value of an environment parameter difference value according to the target environment parameter and the preprocessed actually measured environment parameter; according to the absolute value of the environmental parameter difference value, an execution mechanism adjustment instruction value is determined through a PID control algorithm; and controlling the driving working face centralized dust control system based on the execution mechanism adjustment instruction value. Wherein the executing mechanism adjusting instruction value comprises the angle variation of a guide vane in the negative-pressure air duct body, the opening size variation of an air distributor in the negative-pressure air duct body and the rotating speed of a fan. According to the technical scheme provided by the invention, the safety and the environmental protection property of the tunneling operation are improved.

The invention relates to the technical field of comprehensive dust prevention of mines, and particularly discloses a comprehensive dust prevention device for a fully mechanized excavation face based on dust isolation, which comprises an isolation frame, an opening and closing door for opening and closing and a conveying channel for mounting a conveying belt are respectively arranged on two sides below the isolation frame, and an adsorption channel is arranged above the isolation frame. A filter grid plate is arranged in the opening and closing door; l-shaped water conveying pipes are fixedly installed on the two sides of the opening and closing door, the outer sides of the vertically-downward ends of the water conveying pipes are sleeved with rotating pipes, the upper ends and the lower ends of the rotating pipes are rotationally and hermetically connected with the water conveying pipes, and nozzles are arranged on the outer sides of the rotating pipes. A driving part is fixedly installed on the opening and closing door, an adjusting frame is slidably installed above the rotating pipe, a tooth row is arranged at the other end of the adjusting frame, and a gear meshed with the tooth row is fixedly installed on the outer side of the rotating pipe; according to the invention, the opening and closing door can be closed in time after a person passes, and the nozzle for spraying water mist is opened synchronously, so that dust diffusion is efficiently and conveniently prevented.

The invention relates to the technical field of highway tunnel smoke exhaust systems, and discloses a bypass type smoke exhaust system suitable for extra-long and large municipal and highway tunnels, the bypass type smoke exhaust system comprises a ground, the upper side of the ground is fixedly connected with a tunnel body, and the left side of the interior of the tunnel body is fixedly connected with a connecting assembly; the connecting assembly is used for monitoring parameters such as smoke concentration and temperature in a tunnel in real time, a fixing box is fixedly connected to the left side of the upper portion of the ground, a partition plate is fixedly connected to the interior of the fixing box, a sealing ring is fixedly connected to the front side of the partition plate, and the sealing ring is fixedly connected to the front side of the interior of the fixing box; and a fixing frame is slidably connected to the interior of the sealing ring, and a filter screen is fixedly connected to the upper side of the interior of the fixing frame. Flue gas is effectively humidified and settled in the discharging process, the treatment effect of the smoke is further improved, the system can be adjusted in real time, and it is ensured that quick response is achieved when a fire disaster happens, and spraying of water mist is controlled.

The invention discloses a linkage system of a roadway air distribution device and a dust removal device and a control method, and belongs to the technical field of safety and environmental protection of mine / tunnel construction. The system comprises a long-pressure air control system, a short air draft dust collection system and an intelligent control module, the long-pressure air control system forms an airflow air wall through a long-distance air distribution device to restrain dust diffusion, the short-air-draft dust collection system captures dust through a short-distance dust collection cover, and the intelligent control module dynamically adjusts operation parameters of the long-pressure air control system and the short-air-draft dust collection system based on parameters such as dust concentration and air speed. The control method comprises the stages of dust suppression, capture, weak wind area removal and intelligent adjustment, and efficient dust removal is achieved through airflow collaborative optimization and a self-adaptive control algorithm. The dust collecting rate can be increased by 50% or above, energy is comprehensively saved by 20% or above, potential safety hazards in weak wind areas are eliminated, and the device is suitable for dust-producing scenes such as driving working faces and belt conveying roadways and has the advantages of being efficient, safe, capable of saving energy and wide in applicability.

The invention discloses an underground coal mine wet-type centrifugal dust removal mechanism, a dust removal system and a use method of the dust removal system. The mechanism comprises an inner shaft, a middle barrel and an outer barrel which are coaxially arranged, a second blade is arranged on the outer side of the inner shaft; a plurality of through holes are formed in the peripheral side of the middle barrel, and first blades are arranged on the inner side of the middle barrel; a first annular area is formed between the middle barrel and the inner shaft, a second annular area is formed between the middle barrel and the outer barrel, and the inner shaft and the middle barrel are driven to rotate in the same direction. Dust-containing fluid enters from one end of the first annular area and is discharged from the other end of the first annular area or is upwards discharged from a hollow hole of the inner shaft; and dust-containing liquid drops subjected to rotating centrifugation are discharged from the sewage draining exit. A controllable forced rotating flow field can be formed, so that dust-containing fluid is subjected to larger centrifugal force, stress is uniform, the track is stable, the risk of impact rebound is reduced, fine dust capture and gas separation are completed, decoupling of centrifugal separation and collection of the dust-containing fluid is achieved, and the dust removal effect is better.

The invention belongs to the technical field of dust suppressants, and particularly relates to a biomass-based dust suppressant as well as a preparation method and application thereof. The biomass-based material comprises a micron-sized structure and a nano-sized structure distributed on the micron-sized structure. After the dust suppressant is sprayed on the surface layer of minerals such as coal, the dust suppression mechanism is changed according to the change of the water content, and when the water content is high, the dust suppressant can adhere to coal dust to suppress flying of the coal dust; when water volatilizes, the micro-nano biomass material or the water-soluble cellulose derivative can spontaneously assemble into a film, and the dried dust suppressant has a complete film-forming structure, certain strength, wind erosion resistance and strong affinity with coal, so that the long-time dust suppression capability of the dust suppressant can be ensured.

The invention discloses an air-dividing dust controller, and relates to the technical field of underground dust removal. An air outlet is formed in the other end of the inner cylinder; air distribution holes are formed in the inner cylinder along the peripheral side; the outer cylinder sleeves the outer side of the inner cylinder and can move along the axis direction of the inner cylinder; air adjusting holes are formed in the peripheral side of the outer cylinder; the driving assembly is connected with the outer barrel and used for driving the outer barrel to move in the axis direction of the inner barrel so as to adjust the overlapping area of the air distribution holes and the air adjusting holes; when the overlapping area of the air distribution holes and the air adjusting holes is larger than zero, airflow exhausted through the air distribution holes and the air adjusting holes forms a dust blocking barrier on the outer side of the outer barrel. By arranging the movable outer cylinder and the air distributing holes and the air adjusting holes which are matched with the outer cylinder, the flow of discharged air is flexibly adjusted. According to the design, the air distribution effect can be adjusted according to actual needs, and the air distribution channels can be closed under specific conditions so as to adapt to different working environments and requirements.

The invention provides an intelligent and efficient centralized dust control system and method for a coal mine driving face. The intelligent and efficient dust collection and control system for the coal mine driving face comprises an air draft part, a ventilation part and an intelligent air curtain adjusting assembly. The air draft part comprises an air draft barrel and an exhaust fan, and the exhaust fan is connected with the air draft barrel; the ventilation part comprises a ventilation barrel, an air guide plate, an arc-shaped fan cover and a ventilator; an end part air outlet and at least one side part air outlet are formed in the end part of the ventilating barrel; the end air outlet comprises an axial opening and a plurality of side openings, and a grid frame is arranged between the air deflector and the ventilator; the intelligent air curtain adjusting assembly comprises a driver and a plurality of switch plates, the switch plates correspond to the fan cover air outlets of the arc-shaped fan cover in a one-to-one mode, the output end of the driver is in transmission connection with the switch plates, and the ventilator and the driver are used for adjusting the first air curtain. According to the intelligent and efficient dust collection and control system for the coal mine driving working face, the ventilation and dust falling effects can be improved.

The invention discloses a dust removal and safety guarantee integrated system for coal mine underground drilling. Comprising a mining multi-parameter sensor, an electromagnetic pneumatic valve controller, a cyclone dust collector, a dry bag-type dust collector, a gas drainage pipeline, a dust extraction pipeline, a hole sealing dust extraction cover, a compressed air conveying pipe, an electromagnetic pneumatic valve, a front-stage air ejector, a rear-stage air ejector and an air extraction air ejector. The hole sealing dust extraction cover captures drilling dust, the drilling dust enters the cyclone dust collector through the dust extraction pipeline to separate large particles, and air outlet of the drilling dust is divided into two ways: the first way is connected with the gas drainage pipeline through the air extraction air ejector to convey harmful gas, and the second way is connected with the dry bag-type dust collector to filter fine particles. The mining multi-parameter sensor monitors the concentration, the pressure difference, the temperature and the humidity of CH4, CO and CO2, the electromagnetic pneumatic valve controller dynamically switches gas circuits based on data, dust collection, gas drainage, water isolation and fire prevention and control are achieved, the drilling operation safety and the environment quality are remarkably improved, and the device is suitable for a high-gas mine.

Apparatus, method and computer program product for controlling flushing in rock drilling and rock drilling rigs. The apparatus includes a control unit (CU) and a computer program (22) for controlling the supply of a liquid component (LC) in an air mist flushing system in response to a detected seepage rate (15) of the drilling performed. An operator (22) can set a desired moisture target value (16) for the cuttings (19) removed from the drill hole (12) and the control system automatically adjusts the flushing system to control the supply of the liquid component.

The invention relates to a preparation method of a biomass-based degradable dust suppressant and a spraying device. The biomass-based degradable dust suppressant is prepared from the following components in percentage by weight: 0.78% of a biological matrix, 20.7% of a salting-out salt solution and the balance of an acetic acid solution diluted by deionized water, the method comprises the following specific steps: adding biological matrix powder into an acetic acid solution; the salting-out salt solution powder is poured into a biological matrix acetic acid solution, magnetic stirring is conducted for 30 min under the conditions that the rotating speed is 200 r / min and the temperature is 30 DEG C, and then ultrasonic treatment is conducted for 10 min for full reaction; a salting-out method and a dust suppression technology are combined, high-concentration salt solutions such as sodium citrate and sodium sulfate are selected, physical and chemical effects between salt ions and biomass material molecules are utilized, and the limitation of a traditional cross-linking mode is broken through the synergistic effect of salting-out auxiliary precipitation and weak ion cross-linking net forming; according to the present invention, the long-acting and safe dust suppression agent can be simply and conveniently prepared, the dust suppression efficiency can be effectively improved, and the dust suppression cost can be effectively reduced.

The invention belongs to the field of coal mine dust falling, and particularly relates to a composite coal dust suppressant spraying system and application thereof. The composite coal dust suppressant spraying system comprises a spraying unit and a dust suppressant solution, the spraying unit comprises a water storage tank, a high-pressure water pump and a wide-angle solid nozzle, the dust suppressant solution at least comprises alkylphenol polyoxyethylene ether and xanthan gum, and the dust suppressant solution is provided with a three-dimensional network structure used for filling coal dust particle gaps. By changing a spraying medium and adding materials into water, the characteristics of wetting, bonding, agglomeration and the like are improved, the composite dust suppressant with an energy-shaped three-dimensional network structure is developed, and a composite dust suppressant spraying system with the wettability, the water retention and the wind erosion resistance cooperatively improved is provided, so that the spraying and dust falling efficiency of a coal mine is improved, and the dust suppression effect is improved. And the problem of reentrainment of dust is solved.

The invention discloses a mine fire grading early warning method, system, device, medium and product, and the method comprises the steps: constructing an underground global map of a mine, and obtaining the multi-modal data of all local areas of the mine according to the underground global map; performing preprocessing and three-level data fusion on the multi-modal data, and determining a preliminary fire early warning result of the corresponding local area by adopting an edge hybrid neural network according to the fused multi-modal data; and according to the global multi-modal data of the mine, the initial fire early warning result and the real-time dynamic early warning threshold, performing fire risk prediction on the mine by adopting a central hybrid neural network to obtain a fire graded early warning result of the mine. The fire risk can be predicted more accurately based on multi-modal data fusion and a hybrid neural network; the early warning threshold value and strategy are automatically adjusted according to the real-time change of the mine environment by utilizing the technologies of online incremental learning, meta learning, reinforcement learning and the like, the parameters do not need to be manually adjusted, real-time calibration is realized, and the timeliness of early warning is improved.

The invention relates to the technical field of spraying dust fall, in particular to a spraying dust fall control method and system. The spray dust fall control method comprises the following steps: S1, acquiring first external data before spray dust fall; the first external data comprises first air flow velocity data, first dust concentration data, first dust density data, first dust particle size data and first dust distribution data; s2, on the basis of the first external data, calculating the matching relationship between water pressure and particle size required by spray dust fall and spray flow, generating basic regulation and control parameters, and performing spray dust fall; s3, acquiring second external data after spraying and dust falling; the second external data comprises second air flow velocity data, second dust concentration data, second dust density data, second dust particle size data and second dust distribution data, and S4, evaluating the spraying dust reduction effect on the basis of the second external data, so that control over the spraying dust reduction effect can be effectively improved.

The invention provides a self-weight lower deslagging construction technology of a road tunnel vertical shaft heading machine, and relates to the technical field of tunnel vertical shaft construction. Stable conversion of the deslagging process is achieved through the dynamic regulation and control technology, a progressive pressure reduction strategy is adopted to adjust tunneling parameters in four stages to enter the position above a raise-boring working chamber (thrust is decreased from 14000kN to 8000kN, torque is decreased from 3000kNm to 2000kNm), step changing is conducted by reasonably utilizing the positions of a supporting shoe, a stabilizing shoe and a cutterhead relative to an auxiliary transverse channel, and the tunneling efficiency is improved. Therefore, the conversion preparation of the tunneling process is completed.

The invention relates to a fully-mechanized face multi-angle blowing-suction purification dust removal system and a dust removal method, and belongs to the technical field of coal mine dust treatment. Comprising a dust concentration sensor arranged on a hydraulic support and a linear dust remover arranged on a hollow interlayer of a chute baffle of the scraper conveyer. The dust concentration sensor detects the dust concentration of the coal face and transmits a signal to the control system, and the control system selectively opens and closes the dust remover at the corresponding position to achieve accurate dust removal. The linear dust remover forms an entrainment effect to suck dust generated by coal cutting of the roller of the coal mining machine, and the dust is purified. And meanwhile, a barrier is formed between the coal mining machine and the pedestrian side in manners of forming an air curtain, a water curtain, a fog gun and the like at the air outlet, so that untreated dust is prevented from diffusing to the pedestrian side for the second time. The device is simple in structure and convenient to mount, solves the problem of serious dust pollution of the fully-mechanized coal mining surface, and realizes source treatment of dust while preventing dust diffusion.

The invention belongs to the technical field of coal mine intelligent safety and environmental protection, and relates to an intelligent spraying and dust falling control method and device for a coal mine and computer equipment, and the method comprises the steps: collecting dust concentration, personnel activity and equipment state parameters in a roadway in real time by arranging various types of sensors; constructing a dust diffusion model and risk level evaluation based on the collected dust concentration, personnel activity and equipment state parameters; based on a risk assessment result, an optimal spraying control strategy is automatically generated, and the dust falling effect and resource consumption are balanced; the control strategy is converted into a specific execution instruction, and a spraying device is driven to carry out dust falling; multi-system interlocking linkage and cooperative control dust falling are carried out; through continuous monitoring and data analysis, the operation effect of the system is evaluated, and control parameters are automatically optimized. The system has the advantages of precise dust fall, improvement of operation safety, resource saving, reduction of operation cost, multi-system cooperation, enhancement of emergency response, continuous optimization and improvement of system efficiency.

The invention provides a mine dust concentration prediction and analysis method based on big data, and the method comprises the steps: building a real-time monitoring network of multi-working-face operation in a mine, obtaining the distribution data of dust clouds of each working face and tunnel concentration distribution information, carrying out the data collection according to a dust superposition effect, and obtaining the initial dust diffusion boundary of each region; according to the initial dust diffusion boundary data, the dust concentration superposition coefficient, the interaction influence radius and the diffusion rate of the dust cloud cluster during multi-working-face operation are analyzed, and the diffusion boundary change trend and the key influence area are determined; adjusting a resource allocation optimization scheme of each region according to a real-time change trend of roadway concentration distribution and a control instruction set, and determining operation parameters and distribution positions of dust control equipment; according to the updated concentration distribution state, whether an area with the dust superimposed effect exceeding the standard exists or not is recognized, if yes, control resources of ventilation equipment, dust removal equipment and a spraying device are redistributed, and a new control instruction set is determined.

Tunnel construction ventilation equipment relates to the technical field of tunnel construction auxiliary equipment and comprises a shell, a storage groove is formed in the front side of the interior of the shell, a temperature and humidity adjusting box is installed in the storage groove, the temperature and humidity adjusting box and the storage groove are limited in a sliding mode, and a first heat exchanger is installed in the middle of the interior of the temperature and humidity adjusting box; the first heat exchanger is arranged in the shell and used for adjusting the temperature of passing air, an atomizing and humidifying mechanism is arranged at the rear end of the first heat exchanger, four air channels communicating with the containing groove are formed in the upper end of the back of the shell, fans are installed in the air channels, and fixing frames are installed on the two sides of the shell. According to the scheme, the problem that ventilation equipment cannot adjust the ventilation quality according to tunnel stage requirements is solved.

The invention discloses an intelligent anti-impact control method for a mining remote water seal system. The method aims to solve the problem of water hammer impact caused by quick opening of a valve during remote quick water injection. The method comprises the steps that after a remote water injection instruction is received, a pneumatic valve is controlled to be opened; in the valve opening process, real-time pressure data in the water supply pipeline are obtained; and based on the real-time pressure data, the opening process of the pneumatic valve is intelligently adjusted so as to restrain pressure impact in the pipeline. The method is characterized in that the opening rate of the valve is nonlinearly adjusted according to the pressure safety margin ratio among the real-time pressure, the set maximum safety pressure threshold value and the target steady-state working pressure through a self-adaptive rate feed-forward control model. According to the invention, active suppression can be realized at the initial stage of water hammer impact formation, the pressure peak value is limited within a safety threshold value, and safe, rapid and self-adaptive anti-impact water injection control is realized.

The utility model discloses a circulating heat supply system of a fire-fighting main pipeline in a tunnel, which comprises the fire-fighting main pipeline, a first water inlet and a second water inlet are arranged on the fire-fighting main pipeline, the fire-fighting main pipeline is connected with a fire hydrant through a branch pipeline, and the first water inlet and the second water inlet are arranged on the fire-fighting main pipeline. The circulating heat supply device is respectively communicated with the first water inlet and the second water inlet through a water inlet pipeline; the fire pool is connected with the water inlet pipeline. By arranging the circulating heat supply device, heat can be directly supplied to water flowing through the fire-fighting main pipeline, energy consumption is effectively reduced, on one hand, more energy is saved, on the other hand, the operation cost can be reduced, and economical efficiency is improved; through connection of the fire pools and switching of the valves, it can be guaranteed that water supply in the main fire pipeline is sufficient when a fire occurs, and then timeliness and reliability of fire extinguishing in the main fire pipeline are guaranteed.

The invention discloses a self-expansion and self-diffusion stopping agent for preventing and treating spontaneous combustion of coal in a goaf and a preparation and use method of the stopping agent. Firstly, paraffin is used for blocking a round hole of the middle interlayer, then the two stainless steel hemispheres and the middle interlayer are welded to form a liquid-leakage-free stopping agent shell, finally, a component A, a component B and SF6 tracer gas are injected into the two hemispheres respectively, and injection openings are sealed. The stopping agent stably exists for a long time when no high-temperature heat source exists in the goaf, when the coal spontaneous combustion heat source appears, the stopping agent is heated, the paraffin of the interlayer in the shell and the hole sealing material of the injection opening are sequentially melted, the component A and the component B are mixed and react to release CO2 gas to be self-expanded to form stopping foam fluid, and the stopping foam fluid is sprayed out of the shell; spontaneously seeping and diffusing in goaf fractures, covering and wrapping a fire source, rapidly extinguishing fire, cooling and inhibiting coal spontaneous combustion; and meanwhile, the SF6 tracer gas is quickly extruded out of the shell, so that high-temperature hidden danger early warning is realized, and a basis is provided for making follow-up coal spontaneous combustion disaster prevention and control technical measures.

The invention discloses a coal mine goaf low-temperature nitrogen fire preventing and extinguishing technology integrating intelligent monitoring and control, and belongs to the technical field of coal mine goaf fire preventing and extinguishing. The system comprises a ground nitrogen making machine, a ground monitoring center, an underground nitrogen cooling device, an intelligent monitoring module and a PLC intelligent control module. The nitrogen cooling device comprises a plate heat exchanger, a variable-frequency single-screw compressor, an air-cooled condenser, a liquid storage tank and an electromagnetic control valve which are connected in sequence; the intelligent monitoring module comprises a sensor unit and a communication transmission module; the PLC intelligent control module comprises a core controller, a man-machine interaction unit and a remote transmission unit; and the PLC intelligent control module automatically controls the start and stop of the system according to a preset three-level fire prevention and extinguishing threshold value, and dynamically adjusts the cooling temperature and the refrigerating capacity. According to the invention, 'monitoring-regulation-feedback 'closed-loop intelligent control is realized, an efficient and safe fire prevention and extinguishing technical support is provided for a special mining period of a mine easy to spontaneously ignite, and the system adapts to an underground complex environment.

The invention discloses an air distribution dust control system and an air distribution control method, and relates to the technical field of underground dust removal. The positive pressure air duct assembly comprises an air distributor, and the air distributor is used for distributing part of airflow generated by an air source to the outside of the positive pressure air duct assembly; a negative pressure air duct assembly; the first air volume sensor is used for measuring the air volume flowing through the positive-pressure air duct assembly; the second air volume sensor is used for measuring the air volume flowing through the negative-pressure air duct assembly; the controller is used for balancing the air volume of the positive-pressure air duct assembly and the air volume of the negative-pressure air duct assembly based on the air volume of the positive-pressure air duct assembly and the air volume of the negative-pressure air duct assembly; the wind power provided by the wind source is adjusted through the wind distributor, so that the positive-pressure wind cylinder and the negative-pressure wind cylinder are kept balanced, and the situation that dust at the head-on position is blown up by redundant wind power transmitted by the positive-pressure wind cylinder, and the dust at the head-on position is diffused is effectively prevented. And the air distributor can generate a dust barrier during air distribution, so that dust is limited between the head-on part and the air distributor.

The utility model relates to the technical field of coal mine ventilation, specifically relates to a ventilation device for preventing coal mine gas overrun, including box, knock assembly and dust removal mechanism, dust removal mechanism includes installation guide rail, driving part, screw rod, ball screw nut pair, sliding seat, mounting arm and scraper, the inside of box is provided with filter cavity, the inside of filter cavity is equipped with filter screen both in front and back, after knocking off the dust attached on the filter screen by knock assembly, the cover of dust outlet is taken off, starts driving part, drives screw rod rotation, because ball screw nut pair is connected with sliding seat to drive sliding seat to slide on installation guide rail, and then the scraper is driven to slide on the inner bottom of filter cavity through mounting arm, and then the dust accumulated on the bottom of filter cavity is cleaned, avoids dust to be raised again and be attached on the filter screen, and the influence of the filtering effect of filter screen is caused.

The utility model discloses a ventilation device used in a mine, which relates to the technical field of mine ventilation, and has the technical key points that the ventilation device comprises a dust removal pipeline, an air inlet pipe and an air outlet pipe, and the dust removal pipeline is fixedly arranged between the air inlet pipe and the air outlet pipe; semi-arc plates are fixedly mounted at the two ends of the dust removal pipeline in the width direction, electrostatic dust removal plates are rotatably mounted on the inner sides of the two semi-arc plates, a first motor is fixedly mounted on the inner surface of the dust removal pipeline, and the output end of the first motor is fixedly connected with one end of one electrostatic dust removal plate; and the transmission parts are arranged between the electrostatic dust collection plates, so that resistance to flowing air in the dust collection pipeline is avoided, and the replacement speed of the air in the mine is not influenced.

This application discloses a coal mine curtain grouting early warning system and method, belonging to the field of coal mine spontaneous combustion prevention and curtain grouting technology. The system includes a fiber optic temperature measurement module, a temperature identification and risk assessment module, a curtain grouting response module, and a control platform module, which are connected in sequence via communication. The temperature identification and risk assessment module and the control platform module are also connected. The fiber optic temperature measurement module continuously collects and outputs temperature data from each monitoring point within the monitoring area; the temperature identification and risk assessment module determines and outputs the location information of abnormal areas; the curtain grouting response module includes at least one grouting terminal device for receiving grouting control commands and performing fixed-point grouting operations; the control platform module receives the location information of abnormal areas, generates grouting control commands and sends them to the corresponding grouting terminal devices, and determines the sealing effect after the grouting operation is completed. The embodiments of this application can improve the accuracy of identifying abnormal temperature risks in coal mines.