135 results about "Coal mine dust" patented technology

The invention relates to a method of dusting coal mine surfaces, the method comprising applying stone dust particles treated with a cationic and / or zwitterionic surfactant to surfaces in the coal mine. The invention also relates to liquid formulations, coal mine dusting agents and apparatus for use in such a method.

The invention provides an underground coal mine dust collecting device and belongs to the dust collecting device. One end of a pressure wind inlet of the dust collecting device is provided with a wind inlet, and the other end of the pressure wind inlet is provided with a first inner nozzle. The wind pressure inlet is inserted into a one-level ejector which is provided with a first dust suction inlet. The first dust suction inlet is located on a position of a first receiving room. The one-level ejector is provided with the first receiving room. A first mixing room is arranged at the front end of the first receiving room. A second inner nozzle is arranged on the end portion of the first mixing room. The end of the first mixing room is inserted into a two-level ejector provided with a second dust suction inlet, a water inlet, a dedusting agent inlet and a nozzle. The two-level ejector is provided with a second receiving room. A second mixing room is arranged at the front end of the second receiving room. The second dust suction inlet is arranged on the position of the second receiving room. The water inlet and the dedusting agent inlet are arranged on the position of the second mixing room. The nozzle is arranged at the front end of the second mixing room. The underground coal mine dust collecting device is simple in structure and high in dedusting efficiency, reduces water consumption of coal mine dust collection, eliminates a high-pressure water pump, and reduces cost.

The invention discloses a coal mine dust reduction system. The coal mine dust reduction system comprises a spraying dust reduction portion, a dust collection filtering portion and a control portion. The spraying dust reduction portion comprises a hydraulic pump, a pneumatic machine, a control valve bank and an air and liquid mixer. A water source and an air source are provided through the hydraulic pump and the pneumatic machine, water and air are mixed in the air and liquid mixer, and dust in a mine is cleaned away through sprayed air and liquid mixtures. The dust collection filtering portion comprises a gas washing pool, a filter box, a fan, an exhaust manifold and a branch exhaust pipe. Gas mixtures exhausted from the mine are filtered through the filter box and washed through the gas washing pool under the action of the fan, and finally the gas mixtures are processed through ignition. The spraying dust reduction portion and the dust collection filtering portion are controlled through the control portion, and automatic processing of the system is achieved. The coal mine dust reduction system is high in working efficiency and safety, the spraying dust reduction portion and the dust collection filtering portion are controlled through the control portion to clean the mine so as to remove dust and combustible gases in the mine in time, and the environment in the mine can be safer.

The invention discloses a coal mine safety dust removing device which comprises a dust chamber. The dust chamber is provided with an air inlet and an air outlet. A filter device composed of a filter cloth and a filter net are arranged in the middle of the dust chamber. An air outlet filter net is arranged at the position, on the air outlet, inside the dust chamber and arranged in an air outlet filter net hole. A plurality of spraying pipes are longitudinally arranged on the upper portion of the dust chamber and connected with a water inlet pipe. A filter plate is arranged on the lower portion of the dust chamber and provided with a plurality of filter holes. A water receiving groove is formed in the lower portion of the filter plate. The lower end of the water receiving groove is connected with a drainage pipe. The coal mine safety dust removing device is good in dust removing effect and low in production cost, does not need to be electrically driven, dust in air in the dust chamber is thoroughly removed through the two-layer filter net and the spraying device, coal mine dust can be effectively removed, and the working efficiency of coal mine workers is improved.

The invention relates to the technical field of coal mine dust removal, in particular to a negative-pressure dust extraction micro-mist purification system and method for a fully-mechanized mining face with a large mining height. The negative-pressure dust extraction micro-mist purification method for the fully-mechanized mining face with the large mining height comprises the steps that the fully-mechanized mining face with the large mining height is divided into a plurality of areas; a position with the highest dust concentration in each area is obtained; and a controller controls the directions of an air inlet and an air outlet of a wet-type filter dust separator, so that the air inlet of the wet-type filter dust separator is aligned with the area with the highest dust concentration on the air inlet side for performing dust extraction and purification, and long-range micro-mist flow formed by the air outlet of the wet-type filter dust separator is aligned with the area with the highest dust concentration on the air outlet side for performing dust sedimentation. According to the negative-pressure dust extraction micro-mist purification system and method for the fully-mechanized mining face with the large mining height, long-time suspended fine dust in the upper-part space of the fully-mechanized mining face with the large mining height can be efficiently treated, the problemsthat the treatment effect of original spray and dust sedimentation measures aiming at a whole section is poor, the visibility of a working face is reduced, and the air humidity is increased are solved, and the working environment of borehole operation personnel is greatly improved.

The invention discloses an underground coal mine dust removal device. The underground coal mine dust removal device comprises an installing plate, wherein a protecting shell is fixedly welded to one side of the top surface of the installing plate, a lead screw is rotatably connected between the top and the bottom of the inner wall of the protecting shell, the top of the lead screw penetrates through the top of the protecting shell and extends to the outer part of the protecting shell, and a servo motor is fixedly installed at the end, extending to the outer part of the protecting shell, of thelead screw. According to the underground coal mine dust removal device, the problems that the dust adsorbing efficiency of the dust removal device is lowered and coal dust in a working place cannot be effectively removed in time due to the facts that when the dust removal device uses a filter net to absorb dust, large particles are adsorbed to the surface of the filter net, an existing filter netis not convenient to disassemble and install and cannot be effectively cleaned, and the dust adsorbed by the filter net is too much after the filter net is used for a long time, the dust removal position of the dust removal device is single, and the dust removal only can be carried out for a specific area at a certain fixed position, and inconvenience is brought for underground coal mine dust removal working are solved.

The invention discloses a fully mechanized mining face gettering-induction convection type dust control and removal wind fog screen device and method, and belongs to the technical field of coal mine dust removal. The fully mechanized mining face gettering-induction convection type dust control and removal wind fog screen device comprises draw-out dust clearing fans, fan-shaped flow guide hoods, coal cutter exterior spraying devices and spraying devices between hydraulic supports; the coal cutter exterior spraying devices and the spraying devices between the hydraulic supports are mounted on the two sides, close to rocker arms of a coal cutter, of a cutter body, the two hydraulic supports in front of a moving frame, and the two hydraulic supports on the downwind side of a front roller of the coal cutter correspondingly, and conduct spraying at a certain angle to form corresponding fog screens; a large amount of dust generated by the moving frame and coal cutting is subjected to atomization dust removal; and meanwhile, the two draw-out dust clearing fans which are symmetrically mounted on the positions, close to the cutter body of the coal cutter, of the rocker arms are started, exhaust inlets of the two draw-out dust clearing fans directly face the front roller and a rear roller of the coal cutter correspondingly, and wind outlets are connected with the fan-shaped flow guide hoods. The fully mechanized mining face gettering-induction convection type dust control and removal wind fog screen device and method have important practical significance for improving the operating environment of fully mechanized mining face workers and guaranteeing safety production of coal mines.

The invention discloses a method for preventing opencast coal mine dust from dispersing by utilizing microorganisms and salt groundwater. Firstly, halo-tolerant urea hydrolyzing bacteria are screened from opencast coal mine surface environment; and then the bacteria are placed in the salt groundwater to be cultured for 1 to 3 days, wherein the salt groundwater comprises, by mass concentration, 1-10% of salt, 1-15% of urea and 0.1-2% of calcium ions; and finally, a bacteria solution obtained through enrichment is uniformly sprayed on coal dust surface, and an experiment is terminated after the dust sprayed with the bacteria solution is placed in a natural drying environment for several days. The bacteria utilize the salt groundwater to conduct adhesion bond fixing to particles on dust surface through a solidification effect, so that dust of surface layer cannot migrate with wind; the method for preventing the opencast coal mine dust from dispersing by utilizing the microorganisms and the salt groundwater is green and environmentally friendly and low in cost and can be widely applied to dispersing control of coal mining dust of opencast coal mines in arid and semiarid areas.

The invention discloses a coal mine dust sampler device. The coal mine dust sampler device comprises a box body, wherein support legs are symmetrically arranged at both sides of the lower end of the box body; a support sleeve is slidably sheathed at the lower end of each support leg; a support block is arranged at the lower end of each support sleeve; a buffer spring is arranged in each support sleeve, and is used for fixedly connecting the corresponding support sleeve and support leg. The coal mine dust sampler device has the advantages that by arranging the buffer mechanism, the anti-vibration property of the device is effectively improved; by arranging a movable bottom plate at the bottom part of the interior of the box body in a movably manner, the right end of the movable bottom plateis connected with a movable sealing plate, the movable sealing plate is provided with a material fetching port at the right side of the box body, a sealing gasket is arranged between the movable sealing plate and the box body, a pull ring is arranged at the right side of the movable sealing plate, limiting blocks are symmetrically arranged at both sides of the upper end of the movable bottom plate, and a clamp groove is formed between the limiting blocks; the detection error is decreased, the sampling accuracy is improved, and the practicality is high.

The invention belongs to coal mine dust suppression equipment, particularly relates to a dust suppression device and solves the problem that dust causes damage to an operating environment of a coal mining face during coal mining. The dust suppression device comprises a dust catcher net disposed in a return airway of the coal mining face and a circular water curtain; the dust catcher net is provided with a passenger door; nozzles are disposed on the windward side of the dust catcher net; the circular water curtain comprises a fixing device and a body fixed with the fixing device; a quick connector connected with a water pipe is disposed on the body; a plurality of mist nozzles are evenly distributed on the peripheral side of the body; each mist nozzle comprises a nozzle cap serving as a nozzle frame, a spiral core arranged inside the nozzle cap and a liquid incoming distribution plate disposed at a liquid inlet of the nozzle cap; each liquid incoming distribution plate is evenly provided with a plurality of liquid incoming pores; the spiral core is a trapezoidal cylinder; the outer side of each spiral core is provided with double spiral grooves. The dust suppression device has good effect of dust suppression.

The invention belongs to the field of coal mine dust removal, and specifically discloses mineral safe dust removal equipment. The mineral safe dust removal equipment comprises a dust removal box, wherein one end of the dust removal box is connected with a dust guide pipe, and an air blower is arranged on the dust guide pipe; the interior of the dust removal box is provided with two sprayers, an interceptor and a filter screen from left to right in sequence, the tops of the sprayers are connected with a water inlet pipe through connecting pipes, and the water inlet pipe is used for conveying spraying water; a motor is arranged at the other end of the dust removal box, the motor is in transmission connection with a fan and an impeller blade through rotating shafts in sequence, the fan is positioned at the rightmost end of the dust removal box, and the exterior of the impeller blade is fixedly connected with a fan surface; a collection tank is formed in the bottom of the dust removal boxand positioned at the lower position of the sprayer, the collection tank is connected with the water inlet pipe through a water guide pipe, and the exterior of the water guide pipe is provided with awater pump and a filter in sequence; the exterior of the dust removal box is connected with a fixed mount through a plurality of telescopic springs at equal angles, the bottom of the fixed mount is connected with a base through a damping spring, and a vibrator is arranged at the bottom of the fixed mount.

The invention relates to the technical field of coal mine dust control, in particular to a coal mine dust control method based on dust concentration. An upper limit value and a lower limit value of the dust concentration are arranged in a coal mine spraying device, the lower limit value of the dust concentration is controlled by using a main control unit, thus the lower limit value of the dust concentration is inversely proportional to the continuous spraying time, through the arrangement that the lower limit value of the dust concentration is inversely proportional to the continuous sprayingtime, thus when the dust concentration is high, the lower limit value of the dust concentration is reduced due to the prolongation of the spraying time, the dust concentration can be fully lowered, the dust concentration in the environment can be kept at low concentration for a long time, personal safety of workers is ensured, the incidence of the workers is lowered, thus the spraying device can adapt to different concentrations of dust sources, the amount of spraying is changed according to the concentration of the dust sources, water resources are utilized reasonably, and environmental protection is advantageously achieved.

The invention belongs to the technical field of removal of coal mine dust and provides dust removal equipment suitable for dust control over a coal mining face. The problems that a traditional dust removal method is low in dust removal efficiency, high in water consumption, high in dust prevention cost and the like are solved. The dust removal equipment suitable for dust control over the coal mining face comprises an angle steel base, a steel frame and a plurality of sets of dust removal air drums. The dust removal air drums are arranged horizontally, distributed annularly and evenly and fixed with the steel frame. The bottom of the steel frame is connected with the angle steel base. The dust removal air drums are connected through spraying pipelines. Each dust removal air drum is of a stepped structure and comprises a first-stage drum body, a second-stage drum body and a third-stage drum body, and the diameters of the first-stage drum body, the second-stage drum body and the third-stage drum body are gradually increased. The dust removal equipment can be installed on a coal mining machine and a heading machine, so that the coal mining machine and the heading machine move along with operation equipment to carry out continuous dust removal, the operation environment is improved for a driver of the coal mining machine to a great extent, and the effect of local dust removal is achieved; and compared with a traditional spraying dust removal mode, the most efficient dust removal effect can be achieved with the minimum water consumption, and the dust removal efficiency is remarkably improved.

The invention discloses a wet type coal dust removing experimental system, and relates to the technical field of the mining industry exploitation. A dust removing effect can be effectively improved through the way of arranging top dust removing and side mist-spray dust removing, and an inclination arrangement angle of the side spray in the coal mine dust removing is researched, the parameter sizeof the mist-spray dust removing and the water-spray dust removing can be researched and analyzed to improve a dust removing effect; a field coal dust production problem can be simulated in a gravity falling way through the device, thereby guaranteeing the truth of a simulation experiment and improving the simulation effect, and the height difference can be adjusted as required; by arranging the system as a tunnel structure, the internal condition of the tunnel can be really simulated, the transferring point height, the water spray amount and the water spray height can be controlled, an appropriate mounting location and reasonable water spray amount can be found for a dust removing device at the transferring point through the method of controlling the variables, thereby reducing the water content of the coal while improving the dust removing effect, and then improving the quality of coal briquette.

The invention relates to a preparation method of an environment-friendly coal mine dust reducing agent and aims at solving the problem that existing dust reducing agents are low in wettability, high in evaporation speed and prone to enabling dust to raise again to cause secondary pollution leading to poor dust reducing effect. The preparation method includes: using egg yolk as a matrix, decomposing protein in the egg yolk through enzymolysis, and using alcohol to extract natural surfactant and amino acid in the egg yolk; mixing the egg yolk with starch, modifying the starch under action of microwaves, mixing with carboxymethyl cellulose, and performing graft modification under action of thiourea and formaldehyde to improve coacervation effect; extracting vegetable tannin and polyphenol substances in folium rubi suavissimi to lower tension of water and improve permeability of the water and jointing force; mixing to obtain the environment-friendly coal mine dust reducing agent capable of improving agglomeration ability of dust and tension of the water to improve wettability and dust reducing rate and easy to decompose.

The invention discloses a coal mine dust removal system and dust removal method. The coal mine dust removal system comprises a trapping device, a pneumatic suction device, an entrainment dust removaldevice, a cyclone separation device, a multi-phase flow division device and a dust exhauster which are connected in sequence, wherein the trapping device, the pneumatic suction device, the entrainmentdust removal device, the cyclone separation device and the multi-phase flow division device are all of tubular structures, every two adjacent devices are integrally connected through a flange, and the pneumatic suction device is connected with a coal mine ventilation pipe through a telescopic hose; a slag discharge port of the multi-phase flow division device is connected with a coal mine slag discharge system through a telescopic pipeline, the entrainment dust removal device is connected with a coal mine water supply system through a hose, and stop valves are arranged on the telescopic hoseand a pipeline of the hose. The coal mine dust removal system is reasonable in unit combination design and small in size, and has the advantages of being small in investment, small in occupied area, low in energy consumption, high in dust removal rate and the like, and the coal mine dust removal method has the advantages of being short in process, low in operation cost and the like.

The invention provides a wetting dust sticking material, which is used for coal mine dust reduction. The wetting dust sticking material is prepared from the following raw materials in percentage by weight: 0.5 to 5 percent of secondary alkane sulphonate sodium, 0.1 to 0.5 percent of hydroxypropyl methyl cellulose, 0.1 to 0.3 percent of synergistic ions, 0.05 to 0.2 percent of humectants and the balance of water. The wetting dust sticking material can be prepared from mixed water solution of secondary alkane sulphonate sodium, hydroxypropyl methyl cellulose, synergistic ions and humectants by using conventional stirring equipment at normal temperature; the wetting dust sticking material can be sprayed onto a dust source to control the generation of dust, and can also be spraying the dust-containing air to settle the dust in the air so as to control the generation and the diffusion of the dust. The used raw materials do not have toxicity, and can be naturally degraded; green and environmentally friendly effects are achieved. A dust inhibitor can achieve the effects of reducing the dust reduction water consumption, improving the dust reduction efficiency and saving water resources, and has wide practicability.

The invention discloses a self-ventilating coal-mine dust removing device. The device comprises a device shell, a dust removing cavity is divided in the device shell, an exhaust fan is arranged at anair inlet in the side wall of one side of the dust removing cavity, a plurality of air outlet holes are formed in the side wall of the other side of the dust removing cavity, a filtering plate is arranged in the middle in the dust removing cavity, the bottom of the side, close to the exhaust fan, in the dust removing cavity is provided with a collecting groove, the portion, outside the air outletholes, of the device shell is provided with a dust discharging cavity, and a partition plate is arranged in the middle in the dust discharging cavity. According to the self-ventilating coal-mine dustremoving device, a driving motor works to drive a cranked rod assembly to rotate, the cranked rod assembly drives a sliding rod to reciprocate in the device shell, a cleaning brush on a fixing base atone end of the sliding rod is adopted for cleaning to make dust fall into the collecting groove and discharged into a collecting box connected with the exterior along an inner slideway, the situationthat the dust removing and filtering effect is reduced due to the accumulation of a lot of dust on the surface when the filtering plate works for a long time is avoided, and the device is convenientto use during cleaning.

Disclosed is a mining geomancy-matched scattering-type dust removing device. The mining geomancy-matched scattering-type dust removing device consists of a spraying annular cylinder, an atomizing nozzle, an air sending cylinder body, a rotating bracket and a telescopic bracket. The air inlet end of the air sending cylinder body is connected with an air sending hose. The air outlet end of the air sending cylinder body is provided with a metal head plug. Two rings of annular air seams of different directions are formed in the periphery of the metal head plug. The air sending cylinder body is externally provided with the spraying annular cylinder body in a sleeved mode. The water outlet end of the spraying annular cylinder body is provided with the atomizing nozzle. The water inlet end of therear part of the spraying cylinder body is connected with a high-pressure water inlet pipe. The air inlet hose and the high-pressure water inlet pipe are each provided with an air pressure gauge, a water pressure gauge and an adjusting valve. A filter net is arranged at the front end of the high-pressure water inlet pipe. Fast joints are arranged at an air inlet of the air inlet hose and a waterinlet of a high-pressure hose. The height of a bracket can be vertically adjusted, and adjusting is convenient according to the scene situation. The mining geomancy-matched scattering-type dust removing device is small in size, good in atomizing effect, simple in operation and convenient to use, can be flexibly installed in every dust outburst position in a mine, and is suitable for underground coal mine dust removing work.

The invention discloses a coal mine dust-removing device based on ultrasonic atomization and condensation. The coal mine dust-removing device comprises a negative pressure pipeline composed of an airblower, a vacuum pump and a connecting pipeline. The negative pressure pipeline is provided with a cyclone separator, an ultrasonic atomizer, a pressure valve and a condensation chamber sequentially.The cyclone separator is connected with the air blower. The vacuum pump is further connected with a dust collector. The condensation chamber is internally provided with an ultrasonic oscillator. A sound absorption sponge is further arranged at an outlet of the condensation chamber. The coal mine dust-removing device is easy to implement and high in efficiency, the content of coal dust in air in acoal mine roadway is effectively decreased, vicious accidents such as coal dust explosion are avoided, and safe conducting of the coal mine roadway exploiting process is ensured.

The invention discloses an underground dust collection device and belongs to the technical field of coal mine dust sampling and collection. A withdrawing plate is positioned in a box body, and the withdrawing plate and the box body are matched with each other in a sliding mode; a collecting disc is in a folded structure and is fixedly arranged on an upper surface of the withdrawing plate; filter paper is positioned on the collecting disc; a rotating shaft in the center of the collecting disc is connected with one end of a rotary damper; the other end of the rotary damper is fixedly connected to the withdrawing plate; a first torsional spring is arranged between the center rotating shaft and the withdrawing plate; the upper end of a pressing block corresponds to the collecting disc, and the lower end of the pressing block is hinged to the withdrawing plate; a second torsional spring is arranged between the pressing block and the withdrawing plate; an ejector rod is arranged in the box body and corresponds to the pressing block; a spring damper and a tension spring are both arranged on the lower surface of the withdrawing plate; the spring damper and one end of the tension spring are fixedly connected with the withdrawing plate, and the other end of the tension spring is fixedly connected to the box body; a mechanical timer is arranged on the box body, and a lock head corresponds to a lock hole in the withdrawing plate. The influence by human factors can be reduced, a phenomenon that the filter paper sways to enable the dust to drop is avoided, and the truth of the detection result of dust dispersity is guaranteed.

The invention discloses an environment dust removal device used in a coal mine, and relates to the technical field of coal mine dust collection. The environment dust removal device comprises a cyclonedust removal barrel and an impact water storage box. One end of the cyclone dust removal barrel penetrates through the impact water storage box and extends into the impact water storage box. A flow guiding pipe communicating with the impact water storage box is fixed to one surface of the impact water storage box. One end of the flow guiding pipe is fixedly provided with a water gathering box through a water suction pump, wherein the water gathering box communicates with the flow guiding pipe. One surface of the impact water storage box communicates with a dust removal assembly through a dirtdischarging pipe. A dust collecting box matched with a barrel inner cavity is fixed to the inner surface of a dust removal door. A dust gathering ring matched with the barrel inner cavity is fixed inthe dust collecting box. Through usage of the cyclone dust removal barrel, the impact water storage box and the dust removal assembly, the coal mine underground dust removal efficiency can be effectively improved, classified dust removal is conducted on dust with different sizes of particles, filtering and purifying cyclic usage is conducted on waste water obtained after dust removal, and water resource waste is avoided.

The invention discloses movable coal mine dust removing equipment with a high-pressure nozzle. The movable coal mine dust removing equipment includes a machine body, a dust absorption cavity, an annular pipe, a base, a distillation cavity and a first rotary shaft; the upper of the right side of the machine body is provided with a dust absorption head which is connected with the dust absorption cavity, and the dust absorption cavity is arranged at the upper left side of an inner cavity of the machine body; the lower of the dust absorption cavity is connected with a second fan which is connectedwith a dust absorption pipeline, and the lower left side of the dust absorption pipeline is provided with the distillation cavity; the upper of the distillation cavity is connected with an exhaust fan, the upper of the exhaust fan is connected with a draft tube, and the draft tube passes through the upper wall of the machine body; and the upper of the machine body is provided with the annular pipe. According to the movable coal mine dust removing equipment with the high-pressure nozzle, energy conservation and environment protection are achieved; the use is convenient, and the production costis low; dust in a coal mine can be efficiently and sufficiently removed; and the external environment and builders can be well protected.

The invention discloses a movable dustproof device for a driving face of a coal mine, and relates to the technical field of coal mine dust prevention. The movable dustproof device comprises a dust suction head, a filter box and a dust removal box, the dust suction head is arranged above one side of a mounting table, the dust removal box is fixedly connected to one side of the top surface of the mounting table, and the filter box is fixedly connected to one side of the top surface of the dust removal box; and the dust suction head is integrally arranged in a horn shape, a first connecting ringis arranged on the outer surface of one end of the dust suction head in the circumferential direction, meanwhile, a mounting sleeve is arranged on the outer surface of the other end of the dust suction head in the circumferential direction, first mounting holes are evenly formed in the first connecting ring in the circumferential direction, and semicircular fixing rings are vertically and symmetrically arranged on the outer sides of the mounting sleeve. According to the movable dustproof device, through the arrangement of an electric telescopic rod, a gear disc, a gear rack, a first air cylinder, a second air cylinder, the dust removal box, the filter box, a filter layer and a dust outlet pipe and mutual cooperation of the components, the movable dustproof device is convenient to use, rapid and efficient dust removal can be conducted, water resources in the movable dustproof device can be repeatedly utilized, and waste of the water resources is avoided.

The invention discloses a sprayer for coal mine dust fall, and belongs to the field of dust fall devices. The sprayer used for coal mine dust fall is characterized by comprising an outer shell, a sprayer body, multiple water curtain nozzles and a support; the outer shell is provided with at least one opening used for spraying water mist; the sprayer body is placed in the outer shell and sprays thewater mist outwards through the opening; the multiple water curtain nozzles spray water curtain lines outside the opening to block suspended dust; and the support is used for supporting the outer shell; and the water curtain nozzles surround the center of the opening and are distributed at equal intervals, and the multiple water curtain nozzles are configured in the mode that the directions of the nozzles all point to the same point to form a water curtain with a round face or a conical face. Compared with the prior art, the sprayer for coal mine dust fall has the advantages that the water curtain is formed to capture the dust escaping from the water mist while the dust fall is achieved, so that the dust fall effect is improved.

The utility model relates to a drilling slag removal dust remover for underground coal mines, which relates to a ventilation and dust removal device for underground coal mines. The gas outlet end of the gas pipe is arranged in the straight pipe, and at least one gas nozzle is arranged at the gas outlet end of the gas pipe, and each gas nozzle faces the exhaust port respectively. The advantages of the present invention are: (1) High-pressure gas injection is adopted, the dust collector has no moving parts and electrical components, and the use environment is not limited by gas concentration; (2) The dust collector has simple structure, small volume, light weight, , Quick and convenient installation; (3) The dust removal efficiency of the dust collector is not less than 95% under any dust concentration in the intake air, and there will be no problem of dust collector clogging.

The invention belongs to the field of coal mine dust suppression and the technical field of microcapsules. The invention discloses a sustained-release dust suppression microcapsule, and a preparationmethod and application thereof; the sustained-release dust suppression microcapsule comprises, by the mass percentage, 1%-2% of sodium lignin sulfonate, 3%-5% of acrylamide, 2%-4% of acrylic acid, 0.08%-0.1% of a cross-linking agent, 0.03%-0.05% of an initiator, 0.02%-0.04% of calcium chloride, 0.1%-0.3% of an emulsifier, 1%-3% of chitosan, 1%-3% of ethyl cellulose, 2%-4% of dichloromethane, 1%-2%of glutaraldehyde, 0.1%-0.3% of a pH regulator and the balance being water making the total amount be 100%. A degradable dust suppressant is used as a core material, a sustained-release aggregate isused as a wall material, and an ultrasonic emulsification crosslinking method is adopted for preparation; the release rate of the dust suppressant is increased, the water retention time of the dust suppressant is prolonged, and the dust suppression efficiency of the dust suppressant is improved.

The invention discloses a concentration and particle size measurement system of dust particles of a coal mine. The measurement system comprises a sample collection system, an optical system, a humidity control system and a temperature and pressure control test system. According to the measurement system, the concentration and the particle size of the dust particles can be measured simultaneously within a wider range, and fast and real-time measurement can be realized; the measurement system is well integrated with a computer, so that the higher degree of automation of a measurement device is achieved; meanwhile, the response time of a photoelectric element is short, so that the response sensitivity of the measurement system is improved, and the measurement system also has the characteristics of being simple and convenient in operation, high in measurement accuracy and safe and reliable in use. Through combination with sample collection and atomizing humidification, the humidity of a to-be-measured sample is controlled, so that the support is provided for studying distribution laws of the concentration and the particle size of dust under different humidity conditions.

The invention discloses a coal seam moistening method based on a mussel bionic principle, and relates to the technical field of coal mine dust prevention. The coal seam water injection wetting agent is prepared from the following raw materials: dopamine which is used for generating polydopamine through oxidation auto-polymerization under a weakly alkaline condition, polyacrylamide which is used for carrying out hydrophilic secondary modification on the formed polydopamine, copper sulfate which is used for increasing the speed of generating polydopamine through oxidation self-polymerization ofdopamine; hydrogen peroxide which cooperates with the copper sulfate and is used for increasing the speed of generating the polydopamine through oxidation and autopolymerization of the dopamine; sodium hydroxide which provides an alkaline environment for the solution, so that the pH value of the solution is 8.5-11; and water as a solvent. Dopamine is oxidized and auto-polymerized into polydopamine, and the polydopamine and polyacrylamide are subjected to Michael addition reaction and cross-linked with each other. After the water injection wetting agent is injected into a coal seam, the hydrophilicity of the coal surface can be remarkably improved.

The invention belongs to the field of coal mine dust control and in particular relates to a process for controlling dust in a belt roadway by sections through water spray. The invention aims to solve the technical problem of control of coal dust in tape haulage roadways or intake and return air roadways. The process is characterized in that a spraying device is arranged every 40-60 meters in the roadway; water atomization spray nozzles are arranged on the spraying devices; the distance between the water atomization spray nozzles is 0.3-0.5 meter; the water filtration precision reaches 1000 meshes; and the water pressure is 1-10MPa. The process has the following beneficial effects: the aims of effectively controlling the dust concentration under the shaft and improving the labor hygiene conditions of the working surfaces are achieved; the dust in the roadway is reduced below the harm level; the safety of mine production is improved; and the health of miners and the working environment are protected.