323 results about "Coal mine dust" patented technology

The invention discloses a coal mine dust diffusion simulation and control method based on artificial intelligence, and relates to the technical field of coal mine dust diffusion simulation and control, and the method comprises the following steps: collecting environmental data such as dust concentration, ventilation flow velocity, temperature, humidity and equipment operation state through a monitoring system in a coal mine; and cleaning and formatting processing are carried out in combination with historical working condition data. According to the method, reinforcement learning and virtual extreme scene simulation are utilized, the recognition and emergency response capability of the system to edge working conditions is improved, dust diffusion and explosion risks are effectively reduced, and mine safety is guaranteed. By dynamically adjusting the ventilation and water spraying system, efficient utilization of resources is achieved, energy consumption and operation cost are reduced, and the service life of equipment is prolonged. The system has an adaptive learning capability, can optimize a control strategy according to monitoring data and historical events, can automatically adjust even if the environment changes, improves robustness and flexibility, and reduces manual intervention.

The invention discloses a coal mine dust diffusion intelligent monitoring method based on a distributed sensing network, and relates to the technical field of coal mine dust diffusion intelligent monitoring, and the method comprises the following steps: deploying a plurality of sensing nodes in a coal mine, each node having a function of collecting environmental data, a distributed sensing network is formed through a wireless or wired communication module, and when all nodes are started, a unique node identifier is issued through a central controller, and self-inspection is carried out. Through bidirectional delay calculation and a progressive fine tuning strategy, high-precision time synchronization is achieved, and it is ensured that timestamps of data such as dust concentration and airflow are accurate and reliable. And data jump caused by large correction is avoided through gradual fine adjustment, data continuity is guaranteed, and the precision of dust diffusion analysis and an early warning model is improved. A redundant node management and automatic switching mechanism improves the fault processing capability of the system, avoids a monitoring blind area, accelerates maintenance response through fault information reporting, and ensures stable operation of a monitoring network.

The invention relates to the technical field of coal mine safety monitoring, in particular to an underground coal mine dust concentration monitoring method and system based on multi-modal data fusion, and the method comprises the steps: synchronously collecting dust concentration time sequence data, dust image data, sound wave signal data and environmental parameters through a multi-modal sensor array deployed in an underground coal mine; carrying out preprocessing and feature extraction on the collected data; predicting the decomposed high-frequency and low-frequency component signals by adopting a long short-term memory neural network and a grey Markov model; when the environment humidity is greater than 80%, carrying out light scattering compensation on the predicted value; inputting various predicted values into an improved D-S evidence theory fusion device, and outputting a fusion dust concentration monitoring value; and when the threshold value is exceeded or the temperature and humidity composite condition is reached, an acousto-optic alarm is triggered and a spraying dust-settling device is started. According to the method, the problems of low precision of a single sensor, multi-source data conflict, high-humidity environment measurement deviation and insufficient time sequence and fusion precision in underground coal mine dust concentration monitoring can be solved.

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 relates to the technical field of coal mine dust removal facilities, in particular to an underground roadway full-section spraying dust removal device which is characterized in that a spraying pipe fitting comprises an outer sleeve, an inner sleeve, a spraying head mounted at the bottom of the outer sleeve and a pipe joint arranged on the rear wall of the outer end of the inner sleeve; the water supply connecting piece comprises a connecting shell, pipe sleeves arranged at the two ends of the front wall of the connecting shell and rotationally connected with the pipe joints in a sleeving mode, and a fixing frame connected with the top face of the shell. A plurality of first combination holes are formed in the inner side wall of the telescopic side frame in the vertical direction, and a first rotating shaft is arranged on the lower side of the middle of the front wall of the telescopic side frame. The outer end of a swing box of a telescopic groove structure is hinged to the bottom of the inner side wall of the telescopic side frame, the outer end of the front wall of the swing box is provided with a drain pipe head and a second rotating shaft, and the bottom face of an inner cavity of the swing box is provided with a second combination hole and a third combination hole. Two ends of the swinging cylinder are rotationally connected to the rotating shafts I and II respectively; the full-section spray dust removal of the underground coal mine roadway can be realized, the dust removal effect is improved, and spray water is collected so as to prevent a bottom plate of the roadway from being wet and slippery.

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 belongs to the technical field of coal mine dust prevention, and relates to a fully mechanized coal mining face pedestrian area dust treatment method and device.The device mainly comprises a hydraulic support, an injection dust removal device, a dust removal control box, a main control box and a coal mining machine, the hydraulic support is used for supporting a coal mining face, and the injection dust removal device is arranged at the top of the hydraulic support; the device is used for generating negative pressure to suck and purify dust-containing airflow in a pedestrian area below the hydraulic support. The dust removal control box receives working signals of the hydraulic support and the coal mining machine, controls the injection dust removal device and is electrically connected with the main control box and the automatic pressure regulating valve. A locator is arranged on the leeward side of the coal mining machine to identify the position of the coal mining machine The device purifies dust-containing airflow through spray injection, covers a roadway bottom plate and a dust production area of the scraper conveyor, captures and wets coal dust, reduces raised dust and transverse diffusion of dust, reduces the dust concentration of a pedestrian area, improves the working environment and reduces dust harm.

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 discloses a coal mine dust concentration real-time monitoring method based on big data analysis, and relates to the technical field of coal mine dust concentration monitoring, and the method comprises the following steps: obtaining various parameter information generated in the data fusion process of a big data system in real time, including transient response information and time synchronization information, and analyzing and processing the obtained transient response information and the time synchronization information. According to the method, the transient deviation index and the phase error index are introduced, the data fusion process is intelligently evaluated in combination with the machine learning model, the error problem caused by the sensor response time difference is solved, and multi-level intelligent sensing is achieved. The system accurately judges the risk level, reduces false alarm and missing alarm, takes maintenance, adjustment or emergency intervention measures corresponding to different risks through a grading early warning mechanism, remarkably improves the coal mine monitoring safety, and reduces the accident risk.

The invention relates to a fully mechanized coal mining face respirable dust concentration management limit value determination method, belongs to the technical field of coal mine dust treatment, and is used for solving the problem of inaccurate respirable dust control caused by the fact that a traditional fixed threshold value cannot adapt to a multi-dust-source coupling working condition. The method comprises the following steps: acquiring dust falling efficiency data of multiple dustproof measures, establishing a mathematical model of dustproof parameters and dust concentration, calculating a dynamic management limit value by combining an industrial standard threshold value, and performing self-adaptive adjustment by monitoring and triggering parameters such as spraying pressure and dust removal air volume in real time. Compared with a traditional method, the dynamic limit value enables the respirable dust concentration to be reduced by 40% or above, the multi-measure cooperative dust falling efficiency is improved to 85%, water is saved by 15%-20%, the equipment energy consumption is reduced by 10%, and intelligent and precise dust treatment is achieved.

The invention provides an underground coal mine dust falling device and a using method thereof, and belongs to the technical field of coal mine dust falling. According to the technical scheme, the underground coal mine dust falling device comprises a water storage tank, a water outlet of the water storage tank is communicated with a water inlet of a water pump, a water outlet of the water pump is communicated with a hard pipe, and the hard pipe is sleeved with a supporting frame; a rotating mechanism is arranged on the outer side of the hard pipe, and a lifting mechanism and an adjusting mechanism are arranged on the supporting frame. According to the using method of the underground coal mine dust falling device, the rotating mechanism controls the hard pipe, the supporting frame and the spray head to rotate synchronously, the lifting mechanism controls the supporting frame to drive the spray head to slide up and down along the hard pipe, and the adjusting mechanism controls the spraying angle of the spray head. The device has the beneficial effects that the nozzle can flexibly move in the horizontal direction and the vertical direction, it is guaranteed that close-range space under the device and the periphery of the device are covered by water mist without dead angles, and dust falling blind areas are eliminated.

The invention relates to the technical field of coal mine underground dust prevention and control, in particular to a coal mine dust concentration over-limit spraying and dust-settling device and a control system thereof.The coal mine dust concentration over-limit spraying and dust-settling device comprises a dust sensing array composed of a plurality of dust concentration sensors arranged in a spatially separated mode, a main sensor arranged close to a dust generation source, and a dust concentration sensor arranged close to the dust generation source, the at least two auxiliary sensors are sequentially arranged at a set interval; the wind speed sensing unit is mounted in a preset range of the upwind direction of the main sensor and is used for synchronously capturing real-time wind speed; the partition spraying actuator comprises independent spraying units corresponding to the positions of the sensors, and each unit is provided with a quick-response electromagnetic valve and an atomizing nozzle; the multi-source information fusion controller is connected with the dust sensing array, the wind speed sensing unit and the partition spraying actuator through an industrial field bus; through dynamic threshold setting, dust diffusion path monitoring and prediction interception technologies, the problems of response lag and excessive spraying of a traditional fixed threshold system are solved.

The invention relates to a long-pressure short-pumping dust removal system for a fully-mechanized excavation face of a coal mine with self-adaptive matching parameters, and belongs to the technical field of coal mine dust prevention. In order to solve the problems of parameter matching lag, air duct positioning misalignment and emergency response delay of an existing dust removal system, a dust concentration sensor, a gas sensor, a laser distance measuring sensor and an area controller cooperate to construct a dynamic matching model of the press-in air volume, the dust suction air volume and the wall-attached air duct distance; + / -0.2 m high-precision positioning is realized by adopting a servo traction mechanism, and air distribution is adjusted in real time in combination with a nonlinear control algorithm. According to the system, the dust removal efficiency is improved to 85% or above, the gas standard exceeding response time is shortened to be within 90 seconds, the positioning error is reduced by 80%, the fan energy consumption is reduced by 18%-22%, and efficient and safe production of a coal mine is effectively guaranteed.

The invention belongs to the technical field of coal mine dust control, and relates to a belt coal falling transfer point negative pressure injection spraying dust falling and dust-containing airflow dust control device which is arranged above a coal conveying belt of a belt bracket, is connected with the bottom of a coal falling opening and comprises coal baffles on the two sides of the coal conveying belt and an arch-shaped sealing cover above the coal baffles. The negative pressure injection spraying device and the dust-containing airflow control air knife are mounted on the arched sealing cover. The designed length of the coal baffle is larger than that of the arch-shaped sealing cover, the coal baffle covers two sides of the bottom outlet of the coal falling opening, and dust is effectively prevented from overflowing. In the working process, the negative pressure injection spraying device sucks air through the negative pressure effect and mixes the air with water, and strong spraying dust falling is formed; meanwhile, the dust-containing airflow controls the air knife to form an air curtain, so that dust diffusion is further reduced. The sealing rubber is arranged at the end of the dust removal channel, coal flow transportation is not hindered, and dust can be effectively prevented from overflowing. Through multiple mechanisms, the dust concentration of the working environment is effectively reduced, and an efficient dust falling solution is provided for coal mines and the like.

The invention belongs to the technical field of environmental protection, and particularly relates to a coal mine dust removal device which comprises an air inlet pipe, the air inlet pipe is transversely arranged and comprises a main body part, an air inlet part and a flow slowing part, the air inlet part and the flow slowing part are arranged at the two ends of the main body part respectively, and the flow slowing part is larger than the main body part in size; the spiral blade is eccentrically arranged in the main body part in the axial direction, the bottom of the spiral blade is in clearance fit with the bottom of the main body part, the spiral blade is driven by a power mechanism to rotate, and the conveying direction of the spiral blade is consistent with the airflow direction in the main body part; the connecting pipe is close to the flow slowing part, is arranged above the main body part and is perpendicular to the main body part, and a filtering mechanism is transversely arranged in the connecting pipe; the air outlet pipe is connected to one end of the connecting pipe, and an induced draft fan is arranged in the air outlet pipe; and the dust collection bin is arranged below the slow flow part in a communicating manner. The spiral blade is eccentrically arranged, the airflow direction can be changed through the spiral blade, and the problem of blockage caused by accumulation of solid particles in the air inlet pipe can be solved.

The invention discloses a coal mining machine dust source tracking intelligent dust removal method and system integrated with a hydraulic support, and belongs to the technical field of coal mine dust removal. The system comprises a wet dust collector arranged on the inner side of a hydraulic support shield beam, a telescopic air duct on a top beam and a control system. The wet dust collector is connected with the telescopic air duct through a dust suction pipeline arranged in the support, and a dust suction opening of the telescopic air duct is driven by the lifting mechanism to ascend and descend and suck dust dynamically along with a roller of the coal mining machine. The control system obtains position signals of the coal mining machine, adjusts the position of a dust suction opening and controls the dust remover to be started and stopped, and precise dust source treatment is achieved. According to the method, the dust source is tracked circularly by recognizing the coal cutting state of the coal cutter and dynamically adjusting the height of a dust suction inlet and operation of a fan. The support structure is used for protecting equipment from being smashed and damaged, the device adapts to thin and medium-thickness coal seam space, the dust removal efficiency and reliability are remarkably improved, the dust concentration and the maintenance cost are reduced, miner health and operation safety are guaranteed, and wide application prospects are achieved.

The invention belongs to the field of coal mine dust removal, and relates to a coal mining machine onboard integrated efficient dust remover and a filtering method thereof, an air inlet, a nozzle, a multi-stage filter screen, a corrugated plate demister, a centrifugal fan and other components are integrated to form an efficient dust removal system. During operation, dust-containing air enters through the air inlet, water mist is sprayed out of the nozzles to preliminarily wet dust, and then the dust with different particle sizes is effectively captured through multi-stage filtration of the coarse-efficiency filter screen, the medium-efficiency filter screen and the high-efficiency filter screen. And then the air is dehydrated by a demister, and clean air is discharged by a centrifugal fan. The equipment is provided with a dust cleaning brush and a differential pressure sensor, the filter screen can be automatically cleaned, and the filtering effect is guaranteed. The system has the advantages of efficient dust fall, water saving, environmental protection, intelligent monitoring, compact structure and convenient maintenance, can obviously reduce the dust concentration of the working face, improves the working environment, ensures the health of miners, and is a preferable scheme for dust control of the fully mechanized coal mining working face.

The invention relates to the technical field of coal mine dust fall, in particular to a mining wireless spraying dust fall control method and device, a medium and a product, and the method comprises the steps that key dust fall information analysis is carried out based on coal mine production information, and a key dust fall area and key dust fall time are determined; and then, carrying out timed spraying planning based on the key dust falling area and the key dust falling time, determining a spraying period, and controlling the spraying dust falling device to start spraying according to the spraying period. And then, emergency dust fall analysis is carried out based on the dust information, an emergency dust fall analysis result is determined, and when the emergency dust fall analysis result is that emergency dust fall is started, intelligent induction adjustment analysis is carried out based on the dust information and the wind power information, and the emergency spraying dust fall device is controlled to carry out emergency dust fall operation according to the emergency spraying information. Through intelligent induction and adjustment, the spraying and dust falling device can be started or adjusted in time according to the actual dust concentration, it is ensured that the dust concentration is rapidly reduced when the dust concentration exceeds the standard, and the dust falling effect is improved.

The present invention belongs to the technical field of coal mine dust control. It relates to a coal mining machine annular drum tracking spray dust reduction device, including an annular sprayer, an adjustable telescopic bracket, a pulley, a pulley mounting seat, a pull rope, and a support seat; the annular sprayer is arranged at one end of the adjustable telescopic bracket and is located on the outside of the coal machine drum; the other end of the adjustable telescopic bracket is rotatably connected to the support seat; the pulley is arranged on the outer shell of the coal machine drum motor, and the adjustable telescopic bracket is hoisted on the pulley through a pull rope; when the coal machine drum swings up and down, the pulley cooperates with the pull rope to drive the adjustable telescopic bracket to swing, so that the position of the annular sprayer changes dynamically with the coal machine drum. The present invention utilizes the flexibility of the pull rope and the motion relationship between the two swinging mechanisms to cleverly realize the dynamic tracking of the dust reduction device with the coal machine drum. At the same time, the sprayer is arranged in an annular manner, and the spray forms an annular water curtain, which can cover the coal machine drum in all directions to prevent coal dust from escaping.

The utility model relates to the field of coal mine dust removal equipment, in particular to a hydrodynamic dust remover. The filter takes underground water as a filtering object, one end of the shell is used for feeding air and dust, the other end of the shell is used for discharging water and dust, and the dust removal assembly is located in the shell, one end of the dust removal assembly is connected with the filter, and the other end of the dust removal assembly takes underground water pressure as power to generate airflow and water mist acting on dust. On one hand, water pressure of underground water is utilized to push the water shaft to rotate, then the water outlet pipe is driven to rotate, power is generated, the fan blades are driven to rotate, air sucks dust into the shell, on the other hand, the water pressure of the underground water is utilized, and the underground water is scattered and sprayed out through the spray head to form water mist particles. And finally, the refined water mist can effectively capture dust suspended in the working environment, and wind-water linkage dust falling is achieved. And meanwhile, the amount of water mist required by dust falling is reduced, and the extremely humid mining environment is improved.

The utility model discloses a coal mine fire safety intelligent early warning control module, which belongs to the technical field of coal mine fire safety early warning and comprises a temperature monitoring unit, a gas monitoring unit, a dust monitoring unit, an underground looped network switch, a ground control device and an alarm device. The temperature-sensing optical fibers comprise a distributed temperature-sensing optical fiber host and distributed temperature-sensing optical fibers, and the distributed temperature-sensing optical fibers are laid in the transmission belt and the goaf and can monitor the temperatures of different areas in the mine in real time; the gas monitoring unit comprises a toxic gas monitoring subunit and an inflammable gas monitoring subunit, and can monitor the content of various gases in the mine; according to the coal mine dust monitoring system, the safety of coal mine operation is improved, the safety of workers and equipment is guaranteed, and smooth proceeding of coal mine production and operation is effectively promoted.

The invention discloses a dust blocking method for a working space of fully-mechanized face personnel, and belongs to the technical field of coal mine dust treatment. The invention provides a comprehensive blocking scheme for solving the problems that in the prior art, fully-mechanized face dust is high in concentration and serious in diffusion, and workers are prone to suffering from pneumoconiosis. According to the method, a wireless dust source tracking spraying device is arranged on the outer side of a coal mining machine, and dust generated by coal cutting is settled and guided; a coal mining area and a personnel activity area are physically separated by utilizing an efficient dust blocking and isolating device on the hydraulic support; a negative-pressure micro-mist dust remover is arranged in front of a stand column of a top beam of the support to suck and purify dust near the top beam; and a support dust receiving device is installed on the hydraulic support and used for collecting dust generated by descending the column and moving the support. The method can effectively reduce the dust concentration in the working space of workers on the fully-mechanized coal mining face, reduces the risk of pneumoconiosis of miners, and provides convenience for source-divided and domain-divided treatment of dust on the fully-mechanized coal mining face.

The invention relates to an experimental device for simulating a dust removal effect in a coal mining process. The experimental device structurally comprises an air inlet section, a working simulation section and an exhaust section which are sequentially connected in the direction from air inlet to air outlet, the air inlet section is provided with an air inlet bin, a grid, a heater, a humidifier and a hygrothermograph; the working simulation section is provided with a working bin, a dust simulation device, a spraying device and a monitoring device; the exhaust section is provided with a contraction opening, an axial flow fan, a bag type filter and a ventilation pipeline. According to the experimental device, the dust removal effect is monitored and evaluated in real time by simulating the dust generation condition in the coal mine working environment, combining the implementation of dust control measures and reasonably arranging the mine environment simulation device, the dust simulation device, the spraying device, the dust monitoring device and the exhaust system; therefore, reliable experimental data support is provided for optimization of a coal mine dust control technology.

The invention relates to a coal mining machine spraying dust-settling system capable of moving randomly, and belongs to the technical field of coal mine dust prevention. A placement groove is formed in the upper surface of the coal mining machine main body, an electric push cylinder is fixedly connected to the inner bottom wall of the placement groove, and a water storage tank is fixedly connected to the top end of the electric push cylinder. Through the arrangement of the water storage tank, the high-pressure water pump, the water drainage pipe, the three-way water pipe, the dust falling spraying pipe, the first dust falling spraying head, the T-shaped water spraying pipe, the water spraying branch pipe and the second dust falling spraying head, water liquid in the water storage tank can be pumped through work of the high-pressure water pump, and the water liquid is evenly atomized and sprayed out through the dust falling spraying pipe, the first dust falling spraying head, the water spraying branch pipe and the second dust falling spraying head; and through the arrangement of an electric push cylinder, a supporting spring, a limiting sliding rod and a limiting sleeve, a water storage tank can be driven to move up and down, the height of a low-pressure dust falling spray head and the height of a second dust falling spray head are adjusted, and dust removal operation on coal mining dust with different concentrations is facilitated.

The utility model relates to a coal mining dustproof net which comprises a flexible net, and the flexible net comprises a flexible plastic woven net and a cotton woven net attached to the flexible plastic woven net. The flexible net is provided with a water supply fixing frame mechanism used for supporting, fixing and soaking in water for wetting. The water supply fixing frame mechanism wets the flexible net to form a flowing water film, and the dustproof effect is improved. And a cleaning assembly for cleaning attached coal mine dust is arranged on the flexible net. According to the dust-proof net for coal mining, the arranged water supply fixing frame mechanism is matched with the cotton woven net and the cotton strips, it is guaranteed that water evenly permeates into the cotton woven net to form a water film to be attached to dust in air, and the attached dust is cleaned through the arranged cleaning assembly; and the water is discharged to the filtering and deslagging structure along with the water to be filtered, so that the water is recycled, and the dustproof effect is improved while resources are saved.

The invention discloses a water power negative pressure dust removal device of a coal machine, and belongs to the technical field of coal mine dust removal. Comprising a fixing box, a jet flow assembly and a filtering assembly are installed on the fixing box, the filtering assembly comprises an outer pipe installed on the fixing box, a filtering cylinder is fixedly installed in the outer pipe, the filtering cylinder divides the outer pipe into an outer cavity and an inner cavity, a liquid outlet of the jet flow assembly communicates with the inner cavity, and a supporting shaft is rotationally connected to the outer pipe; an impeller and a driving assembly are installed on the supporting shaft. The jet flow assembly generates negative pressure to suck coal dust, the coal dust is mixed with jet flow water and impacts on the impeller to drive the impeller to rotate, the impeller rotates to stir mixed liquid to the filter cartridge to accelerate filtration, meanwhile, the driving assembly is driven to operate, and the driving assembly sucks filtered water in the outer cavity and sprays the filtered water out through the multiple communicated atomization nozzles. Good dust removal and dust falling effects are achieved.

The utility model discloses a dust falling device for an underground coal mine in the technical field of dust falling devices, which comprises a shell, a plurality of sections of partition plates which are vertically arranged in parallel are connected in the shell, and the plurality of sections of partition plates are distributed in a W shape. The multiple sections of partition plates distributed in the W shape are connected into the shell, the multiple sections of partition plates enable the inner space of the shell to form multiple sections of folding circulation channels, the multiple grooves in the water suction curtain increase the contact area with air, and the attaching plate wets the water suction curtain through the multiple water outlet pipes; due to the fact that underground coal mine dust is large in mass, tends to move linearly due to inertia and then collides with the water absorption curtain, adsorption and dust falling are carried out through the adhesive force of water, dust adsorbed on the surface of the water absorption curtain is washed through the water vertically flowing downwards from the water outlet pipe, the overall air circulation rate of the device is high, and air pressure drop is small. And the dust falling assembly cannot be blocked in the long-term dust falling process, and the dust falling effect is good.

The invention relates to a simulation method and device for a hydraulic support column descending and support moving dust production migration rule, and belongs to the technical field of coal mine dust control. In order to solve the problems that the prediction error of an existing model exceeds 40%, the migration path deviation exceeds 50%, the side seam adjusting precision of the device is + / -20 mm, and the dust falling efficiency fluctuates by 35%, a multi-factor coupling modeling and intelligent dynamic regulation and control technology is provided. The method comprises the following steps: constructing a dust production prediction model of coal rock hardness, water content, roof pressure bearing and side seam spacing coupling, monitoring dust distribution in real time by adopting a laser scattering sensor and a particle size spectrometer array, designing a high-precision electric push rod to adjust the side seam spacing to + / -0.5 mm, and dynamically correcting an error in combination with Kalman filtering. The device comprises an adjustable support assembly, a triaxial pressure loading module and an intelligent verification system. The dust production prediction error is 9.8%, the migration deviation is 14.6%, the adjusting efficiency is improved by 3.2 times, the dust falling fluctuation is compressed to 7.9%, and the respiratory dust inhibition rate reaches 85.4%.

The invention relates to a full-scale automatic calibration coal mine laser dust concentration detection device and method, and belongs to the technical field of coal mine dust concentration detection. The device comprises a power supply and digital signal processing part and a dust concentration detection probe, the dust concentration detection probe comprises a dust guide plate, a dust concentration testing part and a control and signal processing circuit board; the dust concentration testing part comprises a laser, a dust concentration detection area, an optical filter, an optical trap, a scattered light intensity detector, two automatic calibration scattering sheets and a scattering sheet hiding groove. When the detection device works normally, the scattering sheet is hidden in the hiding groove, so that the scattering sheet is prevented from being polluted by dust; when the detection device needs to be calibrated, a digital signal is transmitted to the circuit board to control the motor to push the scattering sheet out of the scattering sheet hiding groove, the scattering sheet is made to be perpendicular to the laser beam, and it is guaranteed that the laser beam vertically passes through the center of the scattering sheet. The device is simple in structure, and can achieve the full-scale automatic calibration of the detection device.