130 results about "Coal mine dust" patented technology

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 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 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 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 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 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 relates to a fully mechanized coal mining face dust distribution spatio-temporal evolution prediction method and system based on multi-dust-source coupling, and belongs to the technical field of coal mine dust treatment and intelligent prediction. Aiming at the problems of insufficient quantification of multi-dust-source interaction, lack of respirable dust monitoring and low prediction model precision in the prior art, the invention provides the following scheme: constructing a coal cutter coal cutting dust production model and a hydraulic support moving dust production model, and fusing coal rock crushing characteristic parameters and equipment working condition parameters; establishing a dust migration numerical model based on a Navier-Stokes equation and a discrete phase model; calibrating model parameters in real time through a distributed sensor network; and generating a respiratory zone height dust spatio-temporal evolution graph and driving an intelligent dustproof system. The method has the effects that the dust concentration prediction error is reduced from 40% to 12-15%, and the dust source positioning error lt is reduced; the dust falling efficiency is improved by 30%, the water is saved by 22%, and the device is suitable for the scene with the mining height of 3-8 m and the wind speed of 0.5-3.0 m / s.

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 application discloses a coal mine dust diffusion simulation and control method based on artificial intelligence, relates to the technical field of coal mine dust diffusion simulation and control, and comprises the following steps: collecting environmental data such as dust concentration, ventilation flow rate, temperature, humidity and equipment running state through a monitoring system in the coal mine, and performing cleaning and format processing in combination with historical working condition data. The application utilizes reinforcement learning and virtual extreme scene simulation, improves the identification and emergency response capability of the system to edge working conditions, effectively reduces the dust diffusion and explosion risk, and guarantees the safety of the mine. Through dynamic adjustment of the ventilation and water spraying systems, efficient utilization of resources is realized, energy consumption and operation cost are reduced, and the service life of the equipment is prolonged. The system has self-adaptive learning capability, can optimize the control strategy according to the monitoring data and historical events, can automatically adjust even if the environment changes, improves the robustness and flexibility, and reduces manual intervention.

The utility model discloses a dust-free ash discharging device of a dust remover, and relates to the technical field of coal mine dust removing equipment. After the dust pump is started, external dust can be sucked into the storage box, the dust entering the storage box can enter the dust removal cloth bag, the continuously blown dust is removed through the dust removal cloth bag, and gas in the dust removal cloth bag enters the air pump through the air suction pipe; dust in the dust removal cloth bag falls down through the articulated chute, so that the purpose of dust removal can be achieved, the purpose of dust-free dust discharging can be achieved, the fixing frame can be detached by detaching the connecting base, cleaning of the dust removal cloth bag is facilitated, and the long-time using effect can be achieved; and after the air pump is started, air in the storage box can be pumped out, the entering effect of external dust can be guaranteed under the cooperation of the air pump and the dust pump, and therefore the actual working efficiency can be guaranteed, the practicability is high, and the using effect is good.

The utility model relates to the technical field of coal mine dust removal appliance application, in particular to a mining wet dust remover which comprises a front cylinder, a water inlet pipe, a fan, an explosion-proof motor and a rear cylinder, one end of the front cylinder is connected with an air inlet cover through a bolt, and a fan impeller is driven by the fan to rotate. High-speed relative movement between the fan impeller and airflow is formed when the fan impeller rotates, the explosion-proof motor is started in a matched mode, the explosion-proof motor drives the flow guide blades to move, coal dust particles can be efficiently captured through inertia collision and diffusion effects, and therefore coal dust in air can be more thoroughly combined with washing liquid sprayed by the water inlet pipe. And secondly, after the washing liquid completes the mixed washing effect, the washing liquid and the air enter the dust baffle of the W-shaped structure at the same time for dehydration operation, the airflow path of the dust baffle is conveniently optimized, the gas-liquid contact time is prolonged, the interception efficiency of the dust baffle is improved, and therefore the dehydration separation effect is achieved.

The utility model provides a coal mine screening device which comprises a machine frame, a screening device, a conveying device, a screening device and a screening device, and the machine frame is provided with a conveying channel which is used for conveying coal mines; the spraying assembly comprises a spraying head, the spraying head is arranged on the rack and located above the conveying channel, and the spraying assembly is used for conducting spraying and dust falling on the coal mine on the conveying channel; the vibrating assembly comprises a driving part and a vibrating screen, the vibrating screen is movably arranged on the rack, located below the conveying channel and arranged corresponding to the tail end of the conveying channel, the vibrating screen is used for bearing the coal mine on the conveying channel, and the driving part is in driving connection with the vibrating screen to drive the vibrating screen to vibrate. According to the technical scheme, the problems that in the prior art, the screening effect is poor during coal mine screening, and generated coal mine dust harms the health of workers can be solved.

This invention discloses a visible light communication channel modeling method for underground coal mine environments, solving the problem that existing technologies fail to accurately quantify the impact of coal mine dust and obstacles on the attenuation of received optical power. The method includes: determining the link parameters of the visible light communication system, simulation parameters of the environment, and simulation parameters of the transmitter and receiver; calculating the attenuation coefficient of received optical power due to coal mine dust and obstacles; calculating the channel impulse response and characteristic parameters; determining the noise simulation parameters of the photodetector; and calculating the bit error rate of the communication system. This invention quantifies the impact of coal mine dust and obstacles on the channel, integrating the attenuation coefficient of received optical power due to coal mine dust and obstacles into the channel model, resulting in a visible light communication channel model that better reflects the underground coal mine environment. This invention enriches the modeling methods for visible light communication channels, and the modeling results provide guidance for the design and deployment of visible light communication systems in underground coal mine environments.

The invention relates to the technical field of coal mine dust treatment, and particularly discloses an underground construction dust treatment device which comprises a bottom plate, a slope table is transversely arranged on the upper side of the bottom plate, two side shells are arranged at the two ends of the slope table in a sliding mode, two top shells are arranged between the two side shells, two fans are installed at the bottom of one top shell, and the other fan is installed at the bottom of the other top shell. The same ends of the two fans are fixedly connected with one connecting cavity; a movable seat is arranged in the connecting cavity, two filter screen cylinders are symmetrically arranged on the movable seat, the two filter screen cylinders are coaxially aligned with the two draught fans respectively, an air outlet is formed in the middle of the side, away from the two draught fans, of the connecting cavity, a ventilation pipe fitting is arranged at the air outlet in a matched mode, and a control mechanism used for controlling the ventilation pipe fitting is installed at the bottom of the connecting cavity. According to the device, the ventilation pipeline body can be efficiently installed, the working efficiency is high, and the influence on underground production is effectively reduced.

The application discloses a portable multifunctional dust removal breathing device and a breathing system, and relates to the technical field of coal mine dust prevention and control. The device comprises a dust removal breathing machine, a face mask, a wind supply pipe, an intelligent terminal and an integrated body. The face mask is connected with the integrated body through the wind supply pipe, the intelligent terminal is signal connected with the integrated body, the intelligent terminal is configured to collect physiological health parameters and send alarm information, and the integrated body is internally provided with a dust remover, a wind supply adjusting device and a control module. The control module is electrically connected with the dust remover and the wind supply adjusting device, the control module is configured to receive the physiological health parameters collected by the intelligent terminal, and adjust the wind supply amount of the wind supply adjusting device according to the physiological health parameters. The application solves the defects of the existing operation protection equipment and related system in the aspects of dust purification effect, breathing comfort, function integration, risk early warning capability, multi-dimensional data collection and application, and provides all-round protection for the occupational health of coal mine workers.

The present application belongs to the technical field of intelligent mine, and specifically relates to a coal mine precise spray control method based on point cloud segmentation and dust prediction, aiming to improve the intelligent and fine level of coal mine dust control. It includes real-time collection of three-dimensional point cloud data of coal mine operation environment by laser radar, semantic segmentation of three-dimensional point cloud data by using deep learning model, identification of dust distribution area, mine air flow parameter and operation intensity information, and construction of dynamic spatial scene semantic graph. Based on the dynamic spatial scene semantic graph, an AI prediction model integrating space-time features is used to real-time predict the dust diffusion path, concentration change trend and high-risk area. According to the dust prediction result, combined with the field working condition and spray system layout, the start-stop instruction, spray direction parameter and intensity parameter of the intelligent spray device are generated, and the dust reduction effect data is obtained. Through the closed-loop feedback mechanism, the dust reduction effect data is fed back to the control end, and the spray control strategy is continuously optimized.

The invention belongs to the technical field of coal mine dust control, and relates to a water mist and air curtain composite dust control and removal system based on a fully mechanized face chute baffle, which comprises a hydraulic support and a scraper conveyer arranged on one side of the hydraulic support, and a blowing and suction integrated purification dust remover is arranged on the chute baffle of the scraper conveyer. An exhaust inlet of the purification dust remover is positioned at the lower part and close to the height of a roller of the coal mining machine, and an air outlet is positioned at the upper part and inclines towards the coal wall side, so that dust generated by coal cutting of the coal mining machine is purified and discharged by utilizing an entrainment effect; the purification dust remover is arranged in a hollow interlayer on one side, close to the coal mining machine, of the chute baffle, the purification dust remover is linear, and the interior of a shell of the purification dust remover comprises an air suction section, a dust removal section, an atomization section, a dehydration section and an air outlet section which are communicated in sequence; a plurality of air outlet channels are arranged on the outer side of the air outlet section in the circumferential direction so as to be communicated with the air outlet, and an air inlet channel is arranged at the bottom of the air suction section so as to be communicated with the air suction opening.

The present application relates to the technical field of open coal mine three-dimensional model construction, in particular to an open coal mine three-dimensional model construction method, system, device and storage medium, first, the images of each area of the open coal mine are mixed based on the pixel of dust concentration, splicing is realized, the open coal mine splicing graph is obtained, after dust removal treatment, the open coal mine dust-free graph is obtained; then, combined with the topography and dust concentration distribution information of the open coal mine to be measured, the open coal mine dust-free graph is subjected to semantic segmentation, different coal mine scenes are identified, and combined with the corresponding dust concentration distribution information, the unmanned aerial vehicle route is planned to obtain point cloud data, the initial point cloud model is constructed, and the surface is optimized to obtain the coal mine point cloud model; finally, the open coal mine dust-free graph and the coal mine point cloud model are unified in coordinates and registered to obtain a texture map, and after fusion, unnecessary point clouds are removed to obtain an open coal mine three-dimensional model, the accuracy and authenticity of the open coal mine three-dimensional model are improved, and the multi-scene application requirements are met.

The utility model discloses a novel TBM (tunnel boring machine) rear matching foldable self-moving type full-section spraying device, which belongs to the technical field of coal mine dust prevention and comprises a fixed base, a folding plate used for adjusting the spraying range is fixedly connected to one side of the fixed base, and a positioning sleeve is fixedly mounted at one end, far away from the fixed base, of the folding plate. A spraying main pipeline used for conveying air and flowing water is fixedly connected into the positioning sleeve, a spraying rotating disc is rotationally installed at one end of the spraying main pipeline, a plurality of sets of nozzles used for spraying and dust falling are fixedly installed on the outer wall of the spraying rotating disc, and the air and the flowing water are conveyed into the spraying rotating disc through the spraying main pipeline, so that the full-section atomization effect is achieved; a fixing structure used for limiting the rotating angle of the folding plate is fixedly installed in the folding plate, an inner cavity of the spray head is fixedly connected with an auxiliary structure used for expanding the water mist spraying range, and through the folding plate and the fixing structure, the spraying device can be rapidly folded and steered during transportation of the monorail crane, and continuous spraying during tunneling is guaranteed.

The invention discloses a coal mine coal mining spraying dust fall prevention device, and relates to the technical field of coal mine dust fall, the coal mine coal mining spraying dust fall prevention device comprises a fixed shell, one end of the fixed shell is rotatably connected with a rotating shell, and one end of the rotating shell is fixedly connected with a filter screen plate. Through the arrangement of the cleaning mechanism, a hydraulic cylinder is started to drive a sliding piston rod to enter a fixed barrel, oil in the fixed barrel enters a sliding groove and extrudes a sliding rod and an extrusion column to move outwards, and a driving motor drives a rotating shell, a filter screen plate, a filter screen frame and a filter screen body to rotate through a gear and an annular rack; the two filter screen plates are arranged in the cleaning box, so that the filter screen bodies enter the cleaning box through the notches to be cleaned, the extrusion columns can extrude the two filter screen plates to be opened, and along with continuous rotation of the filter screen frame and the two filter screen bodies, the cleaned filter screen bodies make contact with the arc-shaped extrusion plates, the arc-shaped pressing plates extrude the filter screen bodies to reset, and the two filter screen plates can be opened to be cleaned; therefore, the cleaning effect on the filter screen body is improved.

The invention discloses a coal mine dust in-situ combustion utilization and working face refrigeration system and method, and the system comprises a coal dust collection and classification subsystem which is used for obtaining combustible coal dust with a predetermined particle size; the coal dust combustion and heat energy conversion subsystem is used for combusting combustible coal dust and preparing high-temperature hot water; the energy regulation and control unit is used for temporarily storing the high-temperature hot water and outputting the high-temperature hot water with stable temperature after regulation and control; the hot water absorption refrigeration and working face cooling subsystem is used for cooling the coal mine stope working face by using high-temperature hot water as a driving heat source; the automatic control module is used for analyzing according to the real-time temperature of the working face and the coal dust concentration data so as to adjust the combustion power of the coal dust combustion and heat energy conversion subsystem and the refrigeration power of the hot water absorption type refrigeration and working face cooling subsystem, and self-adaption coal dust combustion and working face refrigeration are achieved; according to the method, coal mine dust is subjected to in-situ resource utilization, the working face is cooled, waste utilization is achieved, and energy consumption is effectively reduced.

The invention provides a polysaccharide-zwitterion synergistic open pit coal mine dust suppressant and a preparation method thereof. The dust suppressant is prepared from the following raw materials: high-substitution-degree chitosan quaternary ammonium salt, piperazine-N, N '-bis (2-hydroxypropanesulfonic acid) disodium salt, alkyl glycoside, xanthan gum and the balance of distilled water. The preparation method comprises the following steps: slowly adding high-substitution-degree chitosan quaternary ammonium salt into distilled water, and stirring until the high-substitution-degree chitosan quaternary ammonium salt is completely dissolved to obtain a first solution; dissolving piperazine-N, N '-bis (2-hydroxypropanesulfonic acid) disodium salt and alkyl glycoside in the other part of distilled water to obtain a second solution; slowly adding the second solution into the first solution, and uniformly stirring to obtain a mixed solution; adding xanthan gum into the mixed solution, and continuously stirring until the xanthan gum is completely dispersed; and supplementing the residual distilled water until the whole solution is 100g, and continuously stirring to obtain slightly-turbid and viscous open pit coal mine dust suppressant liquid. The mine dust suppressant solves the problems that an existing mine dust suppressant is poor in wettability and cohesiveness, and reentrainment of dust is still caused after spraying.

The invention discloses a coal mine stoping working face rotary telescopic TADA atomization spraying dust fall device, and relates to the technical field of coal mine underground dust prevention, the coal mine stoping working face rotary telescopic TADA atomization spraying dust fall device comprises two atomization sprayers and a coal mining machine, the coal mining machine comprises a coal mining machine body, and rocker arms are symmetrically arranged on the two sides of the coal mining machine body; the bottoms of the two atomization ejectors are rotationally connected with a support, a base is arranged below the support, a through hole is formed in the middle of the base, a rotating mechanism is arranged in the through hole and fixedly connected with the support, and a pitching mechanism is arranged between the support and the atomization ejectors. According to the coal mine stoping working face rotary telescopic TADA atomization spraying dust fall device adopting the structure, the jet orifice sprays high-speed jet spray through the rotary impeller mechanism, and the multiple nozzles arranged on the inner circle and the outer circle spray high-speed water flow, so that dust fall is effectively carried out; and the direction of the atomizing ejector is adjusted through the rotating mechanism and the pitching mechanism, all-directional dust falling is carried out, and the dust falling effect is greatly improved.

This invention belongs to the field of dust removal technology, specifically a wet coal mine dust collector; it includes a wet dust collector; the wet dust collector includes a riser; a vertical cylinder is provided inside the riser; a first annular plate slides on the vertical cylinder; multiple air inlets are opened on the outer ring of the first annular plate on the riser; multiple air outlets are opened on the outer ring of the second annular plate on the riser; an annular partition is fixedly connected to the outer ring of the riser; multiple partition groups are fixedly connected inside the annular partition, and each partition group includes two partitions; a sliding plate slides in each dust removal chamber; a cylinder is fixedly connected to the sliding plate; two rectangular cylinders are fixedly connected above the first annular plate; a third annular plate is provided above the riser; a spray assembly is provided in each dust removal chamber; by setting the annular partition, this invention can avoid external dust from clogging the spray nozzles, thus preventing airflow short-circuiting during subsequent dust removal operations.

The invention discloses dust suppression and falling equipment and method for an open-pit coal mine area, and belongs to the technical field of coal mine dust removal, and the method specifically comprises the following steps: obtaining a mining area map of the open-pit coal mine area and a peripheral area, intercepting a rectangular area from the mining area map as a reference area, carrying out grid division on the reference area, and carrying out grid division on the reference area; generating a plurality of grid regions; defining the center points of the plurality of grid areas as placement points, placing fog gun devices at geographic positions corresponding to the placement points, and working in a preset working mode; environment data of any grid area is obtained in real time, the power of the fog gun device corresponding to the grid area is adjusted in real time according to the environment data, and if the dust concentration of any grid area is larger than a preset threshold value, the grid area is calibrated as a target area; and the working modes and the output power of the fog gun devices in the adjacent grid areas of the target area are adjusted respectively. The dust removal efficiency is improved, and meanwhile resource waste is reduced.

According to the coal mine dust fall control method and device and the electronic equipment, the target air volume adjustment rate is determined in combination with the air volume adjustment emergency degree parameter and the dust concentration influence factor, so that the ventilation quantity of the coal mine monitoring area is adjusted according to the target air volume adjustment rate, air volume adjustment is rapidly carried out under the emergency situation, and the efficiency is improved. The safety of a coal mine collection working environment is ensured; the target flow is calculated according to the air volume adjustment target value, the current ventilation air volume and the current dust concentration, and the flow of the dustproof spray is adjusted according to the target flow, so that the problem that the dust falling effect is reduced or dust flies secondarily due to the fact that the air volume adjustment rate is too high under the non-emergency condition is solved; the defect that the acting effects of a ventilation system and a dustproof system are mutually limited is overcome, the effect that the flow of dustproof spray is matched with the dust concentration change and the air volume change is achieved, and the safety of the coal mine collection working environment is further guaranteed.

The invention belongs to the technical field of coal mine dust collection and falling tools, and provides a gas injection self-excitation type water rotation dust remover, which comprises a negative pressure suction assembly, an air flow pipe fitting, a gas inlet end of the air flow pipe fitting is provided with a plurality of first air injectors, and the plurality of first air injectors are used for generating negative pressure at the inlet end of the air flow pipe fitting; the dust removal assembly comprises an expansion cavity, a water rotational flow cavity and a water storage cavity, the air outlet end of the air flowing pipe fitting communicates with the side wall of the expansion cavity, an air opening communicating with the water rotational flow cavity is formed in the side wall, away from the air flowing pipe fitting, of the expansion cavity, and water in the water storage cavity enters the expansion cavity through an opening formed in the bottom of the expansion cavity; dust-containing air is mixed with water through the air port and enters the water rotational flow cavity, tiny dust and water flow back into the water storage cavity through the bottom of the water rotational flow cavity, clean air is discharged from an outlet in the top of the water rotational flow cavity, and the top of the water rotational flow cavity is communicated with an air exhaust mechanism. Compressed air is used as power, and dust removal work of dust-containing air can be achieved through negative pressure.

The utility model relates to coal mine transportation technical field discloses a matched transport device of directional drilling machine, including the frame, the bottom rotation of frame is equipped with rear wheel and two front wheels, and brake assembly swing is set between two front wheels, and brake assembly includes brake board, arc toothed plate, connecting rod and swing lever, and one swing lever, a pair of arc toothed plates and a pair of connecting rods are swinged in every front wheel, and brake board fixedly is equipped between two swing levers, and two connecting rods are hinged between arc toothed plate and swing lever, and brake board swing drives swing lever synchronous swing, and through connecting rod, arc toothed plate is driven around the pivot rotation and is engaged brake cylinder ring toothed groove, realizes front wheel lock, and reversely promotes brake board to swing, and linkage arc toothed plate is separated from ring toothed groove, and restores front wheel rotation, and arc toothed plate and brake cylinder's gear engagement type brake, reduce the risk of coasting, no complex electric control element, adapt to coal mine dust, humid environment, make the device be able to adapt complex working condition use.

This invention discloses a vertical drying tower that improves drying efficiency by extending the residence time of coal, belonging to the technical field of coal mine dust removal equipment. It includes a drying chamber, a discharge chamber, a dryer, and an exhaust fan. Its core improvement lies in the following: the drying chamber includes multiple layers of gently falling coal stacked vertically. Each layer includes a main frame, multiple gently falling components installed at intervals within the main frame at the same height and capable of lateral oscillation, and multiple air inlets located on the front and rear side walls of the main frame, sequentially facing the drying and exhaust mechanisms. Inside the drying chamber, the impact energy of falling coal drives the gently falling components to oscillate and adjust their angle, indirectly increasing the distance between adjacent components and preventing coal from getting stuck, significantly reducing the probability of blockage. Furthermore, the oscillation of the components dynamically adjusts the direction of the hot air, thereby adjusting the contact angle between the coal and the hot air, resulting in more uniform heating of the coal and further improving drying efficiency.