3825results about "Fire prevention" patented technology

The invention provides a multi-construction-method collaborative dust fall intelligent control method based on deep learning. The method comprises the following steps: collecting mine field data of a mine field in real time; wherein the mine field data comprises mine field environment data, equipment operation data and topographic data; constructing a digital mine field model based on the mine field data; wherein the digital mine field model comprises a terrain model, an equipment model and a dust generation and diffusion model; based on the mine field data and the digital mine field model, constructing a reinforcement learning agent; based on the reinforcement learning agent, performing dust fall control on the mine field; the dust fall control is monitored on the basis of the pre-created human-computer interaction interface, intelligent and efficient control over the mine field dust fall process is achieved, the dust fall effect and the resource utilization efficiency are improved, and meanwhile the flexibility and reliability of the system are improved through human-computer cooperative control.

The invention provides a mining intelligent watering dust fall method and system, electronic equipment and a storage medium, and relates to the field of watering dust fall. The method comprises the following steps: acquiring multi-source heterogeneous environment sensing data; preprocessing the multi-source heterogeneous environment sensing data to obtain preprocessed multi-source heterogeneous environment sensing data, and constructing a mining area holographic environment model based on the preprocessed multi-source heterogeneous environment sensing data; based on the holographic environment model of the mining area, extrapolating and estimating the dynamic change trend of the wind dust concentration by using a space-time sequence prediction algorithm to obtain a wind dust concentration distribution prediction result of each area of the mining area in a future time period; according to the technical scheme, dust suppression is taken as an optimization target, water mist parameters and a nozzle arrangement scheme are taken as decision variables, a mining area holographic environment model and a wind dust concentration distribution prediction result are taken as constraint conditions, an optimal spraying strategy meeting dust falling requirements is solved through a heuristic search algorithm, and the dust falling effect is improved and the water consumption is reduced through the technical scheme.

The invention discloses an intelligent regulation and control method and system for dust removal and air control of an underground high-gas heading face, and relates to the field of intelligent control. Firstly, an environment parameter set and an equipment parameter set are obtained in real time; constructing a digital twinborn model of the tunneling face and the ventilation system based on the environmental parameter set and the equipment parameter set, and simulating gas concentration and dust concentration under different working conditions; the prediction model predicts the gas emission amount trend and the dust concentration trend; and inputting the environment parameter set, the equipment parameter set and the risk level into an optimization model, and generating a target decision instruction by the optimization model. The operation parameters in the ventilation system can be timely regulated and controlled in real time based on the monitored environment parameter set of the tunneling face and the equipment parameter set in the ventilation system, so that the ventilation and dust removal efficiency of the ventilation system is improved. Moreover, the decision instruction is generated by referring to the trend of the gas emission amount and the dust concentration in the future, so that the accuracy of the decision instruction of the ventilation system is further improved.

The invention relates to the technical field of dust fall control, in particular to a mining spray dust fall control method and system based on image recognition, and the method comprises the steps: determining a corresponding simulation mining area model based on the mining area parameters of a to-be-controlled mining area when an actual dust diffusion diagram contains a shadow region; based on the construction parameters of the to-be-controlled mining area and the simulated mining area model, a simulated dust diffusion diagram corresponding to the to-be-controlled mining area is obtained; determining a target dust diffusion diagram based on the actual dust diffusion diagram and the simulated dust diffusion diagram; edge detection and granularity analysis are carried out on the target dust diffusion diagram, and dust information corresponding to the to-be-controlled mining area is determined from the target dust diffusion diagram; and generating a spraying regulation instruction based on the dust information, wherein the spraying regulation instruction is used for controlling the spraying equipment to perform dust falling operation based on the spraying regulation instruction. The accuracy of a dust detection result is conveniently improved, so that the dust falling effect is improved.

The disclosure relates to the technical field of tunnel excavation, in particular to a non-blasting tunnel boring machine and a tunneling method. The tunneling machine comprises a vehicle-mounted device (1), a rotational driving device (2), a translation device (40), a working disc (3), a foundation trench excavation device (4), a drilling and splitting device (5), a hazard removal device (50), a dust suppression device (6) and a material feeding device (7). The rotational driving device (2) is arranged on the vehicle-mounted device (1), the working disc (3) is connected with the rotational driving device (2), the rotational driving device (2) drives the working disc (3) to rotate around a center of the working disc, the foundation trench excavation device (4) is arranged on the working disc (3), the drilling and splitting device (5) comprises a drilling machine (51) and a rock splitter (52) both arranged on the working disc (3), the drilling machine (51) is suitable for drilling a hole in a tunnel face in an annular crack arrest groove, the rock splitter (52) is suitable for splitting the tunnel face, the hazard removal device (50) is arranged on the working disc (3), the dust suppression device (6) is arranged on the vehicle-mounted device (1), and the material feeding device (7) is used for receiving and conveying materials dropped during excavation.

The invention provides a negative pressure suction dust removal device based on a Venturi effect, and belongs to the field of coal mine dust removal. The problems that an existing dust removal device suitable for the field of coal mine dust removal is too large in size and mass, difficult to move, large in noise, high in daily maintenance cost and the like are solved. The device comprises a box body, a water power fan, a Venturi tube, a desilting assembly, a counter-rotating fan, a filtering cabin and a water tank, wherein an air inlet pipeline, a settling cavity, an air duct and an air outlet pipeline are sequentially arranged in the box body; the hydrodynamic fan is arranged at the inlet end of the air inlet pipeline; the input end of the Venturi tube is communicated with the air inlet pipeline, and the output end is communicated with the settling cavity; the desilting assembly is arranged below the air duct; the counter-rotating fan is arranged in the air duct and is positioned between the settling cavity and the filtering cabin, and the filtering cabin is communicated with the air outlet pipeline; and the water tank is communicated with the filtering cabin and is also communicated with a water inlet of the hydrodynamic fan. The dust removal device is simple in structure, small in size and mass, convenient to move, low in noise and low in daily maintenance cost.

The invention discloses an integrated dedusting-cooling system and method for a high-temperature mining working face of a mine. The integrated dedusting-cooling system comprises a sensor monitoring device, a fuzzy PID control device and a dedusting-cooling device, after the compressed air injection unit of the dust removal and cooling device sucks high-temperature dust-containing airflow in the environment into the system, primary dust removal is performed in the humidification and growth unit firstly, then cold fog cooling and secondary dust removal are performed in the cold fog dust removal unit, and finally airflow purification and tertiary dust removal are performed in the dust filtration and fog dissipation unit. In addition, the sensor monitoring device is adopted to collect environmental monitoring data in real time and feed back the environmental monitoring data to the fuzzy PID control device for processing, when any monitoring data deviates from the environmental parameters set by the system, the working condition of the dust removal and cooling device can be adaptively regulated and controlled, and then continuous dust removal and cooling are conducted on the high-temperature mining working face under different environmental parameters. And efficient cooperative treatment of dust and heat damage on the high-temperature mining working face of the mine is realized. The device has the advantages of being small in dust escape amount, high in dust removal-cooling efficiency and low in energy consumption.

The invention relates to an MPRFS-based method for evaluating the efficiency of a gas-powder two-phase explosion suppressant in suppressing gas and coal dust explosion, and belongs to the technical field of coal mine underground gas and coal dust explosion protection. The method comprises the following steps: constructing a mathematical model for inhibiting gas and coal dust explosion by the gas-powder two-phase explosion suppressant; determining initial conditions, boundary conditions and input parameters of the numerical model; establishing a three-dimensional physical model of the explosion container; constructing a simulation calculation grid and a gas, coal dust and gas powder two-phase explosion suppressant distribution domain; creating a thermodynamic file and a reaction kinetics file of gas and coal dust composite explosion and explosion suppressant decomposition; developing a CFD (Computational Fluid Dynamics) numerical simulation solver and an OpenFOAM-Cantera coupling interface; solving a numerical model and correcting the model; and evaluating the explosion suppression efficiency of the gas-powder two-phase explosion suppressant. The method can effectively evaluate the inhibition effects of different gas-powder two-phase explosion suppressants in gas and coal dust explosion.

The invention discloses a tunnel fire extinguishing robot emergency command system and a use method. The system comprises an inspection robot, a fire extinguishing robot, a visual command center, an industrial internet platform and corollary equipment. The inspection robot is in communication connection with the visual command center through the industrial internet platform; the visual command center is provided with a dispatching module for dispatching the fire extinguishing robot and a navigation module; and the fire extinguishing robot is in communication connection with the visual command center through the industrial internet platform. A high-definition infrared camera, multiple types of sensors and a laser scanner are carried, and conditions in a tunnel are monitored in real time; an automatic fire extinguishing device is carried, and the fire spraying angle can be adjusted through remote control for accurate fire extinguishing; by analyzing monitoring data and alarm information, the robot can be remotely commanded to perform emergency response; the system can upload monitoring data and transmit instructions of the command center to the fire extinguishing robot in real time.

The invention relates to a mining damage control method for multi-medium carbon pollution cooperative reduction and control and resource application, and belongs to the technical field of full-waste resource treatment and utilization of a short-distance coal seam mining goaf. The mining damage control method comprises the following steps that filling liquid and filling materials are stirred and mixed while carbon dioxide gas is introduced to form filling slurry; then all-directional shower type spraying is conducted from the filling pipeline to the goaf; performing full grouting on the goaf in a sealed form until the goaf is full, introducing carbon dioxide into the goaf while performing full grouting, monitoring and analyzing underground behaviors, rock reaction and rock stratum stability of carbon dioxide in a backfilling area, and when underground water exists in a sealing and storing area, establishing an underground water monitoring system to monitor the water quality of the underground water; the power plant flue gas is treated and then injected into the goaf to be mixed with the filling material, so that the oxygen concentration of the goaf is effectively reduced, goaf fire disasters are prevented and treated, mining disasters in the goaf are effectively controlled, and the stability of rock strata is improved.

The invention belongs to the technical field of tunnel ventilation, and particularly relates to a ventilation device and method for deep-buried extra-long tunnel construction. Comprising a first ventilation square pipe which is vertically arranged, the first ventilation square pipe penetrates through the top of a tunnel and communicates with the exterior of the tunnel, a forward and reverse rotation fan is installed at the end, close to the exterior of the tunnel, of the first ventilation square pipe, and a conical dust outlet is formed in the end, away from the forward and reverse rotation fan, of the first ventilation square pipe; the conical dust outlet is provided and communicated with a dust collection container; filtering and ash removal are circularly carried out, ventilation and exhaust in the tunnel are achieved, and meanwhile the problem that a filter screen needs to be frequently maintained and replaced can be solved; according to the tunnel ventilation and dust removal device, exhaust and dust removal operation is conducted on one side of tunnel construction, the construction working environment is guaranteed, ventilation can be conducted on all positions of a tunnel, and it is guaranteed that fresh air is not polluted during ventilation while efficient dust removal is achieved in a ventilation and exhaust and dust removal separated treatment mode; the blocking probability of the filter screen plate can be reduced.

The invention discloses a shallow hidden fire area radon gas in-situ tracing accurate identification and definition prevention and control system, belongs to the technical field of mine fire prevention and control, and aims to construct a dynamic monitoring, accurate delineation and targeted plugging multi-cooperation closed-loop governance chain and an in-situ radon detection and identification monitoring unit. Drilling, cup burying and sampling integrated operation is completed, and a radon gas concentration abnormal signal is monitored in real time; the radon measurement magnetic method fire area precise delineation unit is used for quantitatively delineating a fire source prevention and control area in a grading manner by fusing a radon gas magnetic field two-parameter ring type measurement network layout and combining an intersection and union set abnormal area division method and a comprehensive abnormal index threshold value method; according to the earth surface crack self-adaption blocking treatment unit, a dynamic shoveling solidified slurry precise blocking device is adopted, and efficient treatment of the shallow buried coal seam hidden fire area is achieved by separating an earth surface and an underground air leakage channel through bucket prepared soil screening and conveying, instant slurry preparation through a synthesis system, directional slurry spraying through a blocking mechanism and crawler belt ballasting dense blocking.

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 explosion-proof cooling device for the underground coal mine comprises a frame, an air-cooled condenser, a compressor unit, a shell-and-tube evaporator and a base are installed in the frame, and a programmable control box is installed at the left end of the frame; the air-cooled condenser is used for heat dissipation and cooling of coolant compressed gas; the compressor unit is used for compressing a gas refrigerant and comprises an oil separator, a double-screw compressor, a first motor, a double-loop reversible vacuum electromagnetic starter, a liquid storage tank, a first drying filter and a second drying filter; the shell-and-tube evaporator is used for heat exchange between high-temperature nitrogen and a low-temperature refrigerant. According to the cooling device, a refrigerant used when the cooling device works can be recycled, the investment of resources and cost of the part is reduced, the refrigeration cost is saved, nitrogen in the device can rapidly and continuously release low-temperature nitrogen, the air temperature in a large range of a mining area is efficiently achieved, air is inerted, the oxidation spontaneous combustion rate of coal is reduced, and gas explosion is restrained; the mining area safety is improved.

The invention belongs to the technical field of mining, and particularly relates to a movable dust falling assembly for surface mining, which comprises a bottom plate, a U-shaped supporting plate is arranged on the top surface of the bottom plate, a circular shaft is rotatably connected to the top surface of the bottom plate, and the top end of the circular shaft is rotatably connected with the supporting plate. A water storage cylinder is arranged on the inner side, close to the top surface, of the supporting plate, a water spraying cylinder is fixedly connected to the left end of the water storage cylinder, a pressure cylinder is fixedly connected to the inner wall of the water spraying cylinder, and a spraying assembly is arranged on the end face of the water spraying cylinder; two rotating shafts are fixedly connected to the side wall of the water storage cylinder in a front-back symmetry mode, the other ends of the rotating shafts are rotationally connected with the supporting plate, a protective shell is fixedly connected to the front side wall of the supporting plate, and an angle adjusting assembly is arranged in the protective shell. The angle can be manually or electrically adjusted according to requirements, meanwhile, the angle of the atomizing nozzle can be changed, and the dust falling efficiency is improved.

The invention discloses a blasting water cannon dust removal device and a use method thereof, and belongs to the technical field of dust removal. A blasting water cannon dust removal device comprises a movable base and further comprises a water storage tank, the water storage tank is fixedly arranged at the top of the movable base, a water pump is arranged at the top of the water storage tank, the water outlet end of the water pump is connected with an adjusting pipe, and an atomizing nozzle is fixedly arranged at the end, away from the water pump, of the adjusting pipe; the high-pressure driving part is arranged at the rear end of the adjusting pipe and used for guiding high-pressure air pushing the water body into the adjusting pipe; the angle adjusting assembly is arranged on the water storage tank and is used for driving and adjusting the spraying angle of the atomizing nozzle at the end part of the pipe; and a length adjustment assembly; the position of the atomization nozzle can be adjusted according to different dust falling requirements, then the dust falling range is adjusted, the best spraying dust falling effect on the whole space in the spraying range is achieved, and the problems that in the prior art, dust falling equipment is poor in dust falling effect and low in efficiency are solved.

The invention relates to the technical field of underground dust removal and ventilation, in particular to an underground driving working face ventilation and purification device and a use method.The underground driving working face ventilation and purification device comprises an air duct, a detection frame is arranged at the top of the air duct, a sensing system is arranged outside the detection frame, and a dust collection unit is arranged in an inner cavity of the air duct; compared with an existing ventilation and purification device for the driving working face, when air suction is conducted on the driving working face through an air duct, the head-on collecting assembly can accelerate the air suction speed of the air duct, on the other hand, the head-on collecting assembly can be close to the area, with large dust, of the driving face, accurate suction is achieved, and the dispersion speed of dust is reduced; dust in the air is removed from the underground driving working face through the atomization dust removal assembly; the head-on collecting assembly is close to the heading face of the dust raising position and assists the air duct in adsorbing and discharging air.

The invention relates to a control method for linkage of multi-source dust treatment and dust removal in a closed underground space. The control method is applied to the dust removal system. The method comprises the following steps: firstly, performing three-dimensional dynamic simulation on an airflow field in a closed underground space based on a computational fluid mechanics model to obtain flow field data output by the three-dimensional dynamic simulation; then, based on the flow field data, isolation and sealing control is performed on the source of dust in the underground space. And then the operation area is divided into a plurality of functional areas, and the air volume of the independent air draft pipeline system of each functional area is determined. Then, the dust is guided to be concentrated towards a suction area in the multiple functional areas through an air flow organizing device. Finally, multiple pieces of sensor data of the multiple functional areas are collected according to the sensors of all the functional areas, and big data analysis is carried out based on the multiple pieces of sensor data so as to control the dust removal system. According to the invention, dust in the closed underground space can be efficiently and reliably controlled and treated.

The invention relates to the technical field of tunnel ventilation and environmental protection, in particular to an efficient and energy-saving tunnel ventilation and dust removal integrated system. Data analysis and decision making; ventilation control; dust removal operation; and sewage treatment. The intelligent sensing module is installed in the tunnel, environment parameters of different positions can be accurately obtained in real time and transmitted to the central control system, the efficient and energy-saving draught fan is selected, the frequency conversion and speed regulation device is installed, energy consumption is reduced, and by arranging the air filtering device and the dust falling device, the dust falling efficiency is improved. The dust collection device and the dust blocking device arranged at the tunnel portal effectively control the air environment quality in the tunnel, sewage purification and cyclic utilization are achieved through sewage treatment, and the system is high in intelligent degree, can be flexibly adjusted according to the actual situation and is suitable for popularization and application. The problems that a traditional ventilation and dust removal mode is high in energy consumption, poor in effect, lack of intelligent control and the like are effectively solved, the health of constructors is guaranteed, and pollution to the surrounding environment is reduced.

The invention discloses a water sprinkling system, a control method of the water sprinkling system and a watering cart, and relates to the technical field of roadway watering, the water sprinkling system comprises a water sprinkling module, a control module and a detection module, the water sprinkling module is used for being arranged on a cart body of the watering cart, and the water sprinkling module comprises a power pump, a driving device and a sprinkling structure; a water inlet of the spraying structure communicates with a water outlet of the power pump, a water inlet of the power pump is used for communicating with the water tank, the output end of the driving device communicates with the input end of the power pump, the driving device is in signal connection with the control module, and the control module is in signal connection with the detection module and used for being in signal connection with a power system of the watering cart. The spraying direction and the spraying water amount of the spraying structure can be adjusted. According to the water sprinkling system, the control method of the water sprinkling system and the water sprinkling truck, the dust removal effect can be better, and the operation efficiency is higher.

The invention relates to a gas-water curtain partition type tunnel smoke control system and method, and belongs to the field of tunnel fire prevention and control, the gas-water curtain partition type tunnel smoke control system comprises a tunnel, smoke control partitions, a tunnel fire extinguishing system, a gas curtain generation system, a water curtain generation system and a fire detection alarm, the gas curtain generation system comprises a gas curtain generation tail end, and the water curtain generation system comprises a water curtain generation tail end. The tunnel is divided into a plurality of smoke control subareas by the air curtain generation tail end and / or the water curtain generation tail end. A plurality of air curtains and water curtains can be formed at the boundaries of the two sides of the smoke control subareas, at the moment, smoke generated by a fire source can be isolated into the smoke control subareas, the smoke can be continuously eliminated under the internal circulation purification effect of the tunnel fire extinguishing system, meanwhile, the tunnel fire extinguishing system can automatically restrain fire spreading, and therefore the smoke spreading path is thoroughly blocked.

A combined dust suppression system for a metal ore unloading station, and a using method. The combined dust suppression system consists of an ore unloading station tunnel wall surface accumulated dust high-pressure water flushing device, an ore unloading station tunnel floor spraying, watering, and wetting device, and an ore unloading station ore train floor bidirectional high-pressure spray dust suppression device. The ore unloading station tunnel wall surface accumulated dust high-pressure water flushing device is used for performing manual flushing on a tunnel by means of high-pressure water in the travel direction of an ore unloading train, the ore unloading station tunnel floor spraying, watering, and wetting device is used for performing spraying, watering, and wetting on the tunnel, and the ore unloading station ore train floor bidirectional high-pressure spray dust suppression device isolates dust generated during ore unloading at the ore unloading station. The water consumption can be reduced, excessive water in an ore unloading pit that causes adhesion and blockage can be effectively avoided, the field applicability of high-pressure spray dust suppression measures is improved, and on-demand spray dust removal of a high-pressure spray device is achieved; high-pressure water is used for flushing accumulated dust on the tunnel wall surfaces of ore unloading stations, and the tunnel floors of ore unloading stations are sprayed, watered, and wetted, thereby achieving significant comprehensive dust suppression and dust control effects, and notable energy-saving effects.

The invention relates to a coal mine wet dust collector applied to the technical field of coal mine dust removal, which comprises a Venturi tube, a rotational flow mechanism, a purification chamber and a dust removal intelligent controller, the rotational flow mechanism comprises a driving part mounted at the lower part of an inner cavity of the Venturi tube, a rotational flow net disc mounted in the circumferential direction of an output shaft of the driving part, and a pressure sensor mounted between the rotational flow net disc and the output shaft of the driving part; a dust treatment module, a rotational flow treatment module and a sludge treatment module are arranged on the dust removal intelligent controller, and by adopting the structure, a mixture of dust and water mist is intercepted by the rotational flow net disc rotating at a high speed when entering the bottom of the Venturi tube, so that the dust removal filtering efficiency is improved; by arranging the dust removal intelligent controller, the sludge pollution condition of the rotational flow net disc can be conveniently and automatically detected, the rotational flow net disc is automatically cleaned and flushed, the service life of equipment is prolonged, the maintenance period is shortened, automatic pollution discharge is achieved, and the dust remover is more automatic and intelligent.

The invention relates to the technical field of mine ventilation equipment, and discloses coal mine dust removal ventilation equipment which comprises an air pipe, an air draft assembly used for air draft is arranged at the top of a bottom plate of an inner cavity of the air pipe, a collecting assembly used for dust removal is arranged in the air pipe, and the collecting assembly comprises a lower baffle and an upper baffle. The lower baffle and the upper baffle are fixed to one side of a bottom plate and one side of a top plate of an inner cavity of the air pipe correspondingly, an air cylinder is fixed to the surface of the middle position of the upper baffle, an output shaft of the air cylinder penetrates through the top of the air pipe, a linkage plate is rotationally connected to the top of the output shaft of the air cylinder, and a magnetic sheet set is inlaid in the bottom of the linkage plate. According to the exhaust fan, the activated carbon box set is arranged in the air pipe, when the exhaust assembly conducts exhaust type ventilation, after air enters the air pipe, dehumidification and dust removal are conducted through activated carbon particles in the activated carbon box set, the influence of dust and moisture on an impeller of the exhaust fan is reduced, and then the ventilation efficiency of the exhaust fan is improved.

The invention relates to the technical field of constructional engineering, in particular to a tunnel construction safety monitoring and automatic spraying dust fall method, which comprises the following steps: acquiring sensing data of a construction area, the sensing data at least comprising dust concentration data, humidity data and airflow data at each detection position; according to the dust concentration data, determining a high dust concentration area and predicted dust concentration data of the high dust concentration area at a future moment; according to the dust concentration data, the predicted dust concentration data, the current position of a spraying device and the position of the high-dust-concentration area, the humidity data and the airflow data are combined, and spraying control logic is determined; according to the spraying control logic, a spraying device is controlled to spray water to the high-dust-concentration area for dust falling. By monitoring the sensing data of the construction area and processing the sensing data to determine the appropriate spraying control logic, the dust falling effect is effectively improved.

The invention discloses a blasting smoke dust prevention and control method and system for a large-section underground petroleum reserve cave depot, and relates to the technical field of blasting smoke dust prevention and control. The method comprises the steps that smoke dust parameter sensors are arranged in a plurality of preset monitoring areas between a charging trolley and a tunnel face in a blasting area; based on a smoke parameter sensor, smoke parameters of the multiple preset monitoring areas after blasting are obtained; on the basis of the smoke dust parameters, the time-air transportation rule of tunneling blasting dust and smoke in the blasting area is determined; and on the basis of a time-air transportation rule, determining an effective area and an injection path which need to be covered by mist spray for treating smoke dust. The technical problem that in the prior art, the dust falling efficiency is low is solved.

The invention discloses a translation type cutting device for a tunnel cantilever heading machine, which comprises a disc-shaped mounting seat movably arranged on a base, a multi-angle adjusting mechanism is arranged between the base and the disc-shaped mounting seat, the lower end of the base is connected with the heading machine through a vertical driving oil cylinder, the upper end of the disc-shaped mounting seat is connected with one end of a suspension arm, and the other end of the suspension arm is connected with the base. The other end of the suspension arm is provided with a monitor body, one end, far away from the suspension arm, of the monitor body is provided with a cutting mechanism, the suspension arm is provided with a driving motor or a hydraulic motor, an output shaft of the driving motor or the hydraulic motor is coaxially connected with one end of a transmission rod, and the transmission rod is coaxially and rotatably assembled in the monitor body; and the other end of the transmission rod is connected with the cutting mechanism. According to the invention, the cutting working surface can be effectively enlarged, the cutting maneuverability is improved, and the tunneling efficiency of the tunneling machine is improved. The invention is suitable for the technical field of tunneling in tunnel construction.

The invention discloses a coal mine hidden disaster-causing multi-source factor superposition disaster-causing risk prediction method, and relates to the technical field of coal mine construction risk prediction. The method comprises the following steps of S01, information acquisition and processing, S02, risk assessment model construction, S03, risk early warning result display, S04, accident risk assessment, S05, risk information three-dimensional visualization, S06, emergency rescue resource management and S07, monitoring and early warning technology application. According to the method, through utilization of a GIS information acquisition platform, multi-source data of a coal mine can be effectively integrated, and the risk of the coal mine can be effectively analyzed; comprising production monitoring, geographic information, safety management and control and the like; the method overcomes the defect of incomplete data acquisition in the prior art, and ensures that the risk assessment can be performed based on comprehensive and accurate data, thereby improving the monitoring capability of the hidden disaster-causing factors of the coal mine.

The invention relates to the technical field of goaf fire prevention and extinguishment, in particular to a dynamic monitoring method and system for closed goaf fire prevention and extinguishment. According to the dynamic monitoring method, early warning parameters in a closed goaf and the air leakage amount of an air leakage position are monitored, and when the concentration of oxygen in the closed goaf is larger than a safety threshold value, the closed goaf is started; inert gas with the concentration and the flow is dynamically injected into the closed goaf until the concentration of oxygen in the closed goaf is smaller than or equal to a safety threshold value, and monitoring continues; the monitoring system comprises a gas injection system and a monitoring system, wherein the gas injection system is used for injecting inert gas into a plurality of closed goaf areas, and the monitoring system is used for monitoring early warning parameters in the closed goaf areas and the air leakage amount of air leakage positions. And controlling a gas injection system to inject inert gas into the closed goaf according to the oxygen concentration and the air leakage amount in the closed goaf. The purpose of efficient fire prevention and extinguishing through dynamic control over inert gas can be achieved, and spontaneous combustion of residual coal in the goaf is effectively prevented.

The invention relates to the technical field of coal rock dynamic disaster prevention and control, in particular to a rock burst, gas outburst and dust composite disaster integrated prevention and control method which mainly comprises the steps that firstly, a plurality of pressure relief holes are drilled in a coal body in a transportation crossheading and an air return crossheading, gas extraction is carried out on the pressure relief holes, then secondary drilling is carried out on the pressure relief holes, and the gas outburst and dust composite disaster integrated prevention and control method is obtained. And deep gas extraction holes and deep coal seam water injection holes are formed, then gas extraction of the deep gas extraction holes and water injection of the deep coal seam water injection holes are conducted at the same time, and finally grouting plugging is conducted. According to the method, preliminary pressure relief is conducted on the coal body, gas accumulation of coal rock mass at the shallow portion of the roadway is reduced, then deep gas extraction and water injection are conducted at the same time, and deep gas extraction and deep coal seam water injection of the coal face can intersect and cooperate with each other in the coal body; the effects of extracting gas from a deep coal seam, wetting and softening the coal body and improving the physical and mechanical properties of the coal and rock mass are more effectively achieved, and pressure relief-extraction-water injection integrated prevention and control are achieved.