1874results about "Dust removal" patented technology

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

The invention 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 discloses an excavation roadway turning construction method and a roadway construction method. According to the method, the turning track is accurately controlled through geological parameter pre-research and surveying and setting-out, and the problems of relaxation and damage caused by track deviation and long surrounding rock exposure time of a traditional turning section are effectively solved in combination with pilot tunnel advanced excavation and dynamic collaborative supporting. Pilot tunnel advanced excavation reserves a space for subsequent expanded excavation, a cutting head of the integrated equipment can horizontally rotate to adapt to curve excavation, and supporting force is dynamically adjusted in cooperation with real-time scanning of surrounding rock deformation data, so that the surrounding rock exposure time in turning section construction is shortened to 5-8 minutes from 40-60 minutes of a traditional process, and the construction efficiency is improved. The wall caving and roof caving risks caused by long-time support-free exposure of the surrounding rock in the turning area are remarkably reduced, meanwhile, it is ensured that the turning radius and the turning angle are matched with the design height through a parameter correction program, and the accuracy and safety of turning section construction are improved.

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

The invention relates to the technical field of hard rock drilling construction, in particular to a rock breaking hob, a shield tunneling machine cutterhead and a shield tunneling machine. The rock breaking hob comprises a cutter shaft, an annular cutter body and a plurality of pressurizing assemblies; an annular cavity communicated with an external high-pressure water source is formed in the cutter shaft; the annular cutter body is rotationally arranged on the cutter shaft, and a plurality of blind holes are formed in the annular cutter body; the pressurizing assembly comprises a compression block, a plugging block and a first elastic piece; the compression block is in sealed sliding connection with the inner wall of the blind hole to form a compression cavity, and a plurality of first channels used for communicating the compression cavity with the annular cavity are formed in the annular cutter body; a sliding groove, a communicating hole and a water spraying hole are formed in the compression block; the sliding groove communicates with the compression cavity through the communicating hole. The sliding groove communicates with the end face of one end of the compression block through the water spraying hole. The plugging block is slidably connected with the sliding groove and blocks the water spraying hole when located at the end, close to the central axis of the annular cutter body, in the sliding groove. The first elastic piece is used for enabling the compression block to pop out of the blind hole. The rock breaking device has the effects of reducing water source waste and improving the rock breaking efficiency.

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

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

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

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

The utility model provides a building type crushing and filling system which comprises a crushing building which is arranged to crush materials and convey the materials which are crushed to have preset granularity to a finished product warehouse building; the finished product warehouse building is provided with a finished product tank used for receiving the materials with the preset granularity, and a discharging opening of the finished product tank is communicated with a filling device; and the filling device is arranged to mix the material from the finished product tank with the mixed additive and then convey the mixed material to a goaf or an accident pool. According to the utility model, the layout of each device is more reasonable, and the occupied space is smaller; the integrated full-process continuous operation including material crushing and filling can be realized; and when maintenance and change are needed, assembly can be directly carried out by taking a building as a unit, so that the influence on other equipment is reduced.

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

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

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

The invention discloses a mining air volume monitoring and control system, which relates to the technical field of coal mine safety ventilation and comprises a plurality of intrinsically safe sensors, at least one group of intrinsically safe control boxes, a controller and a power supply, the GQQ5 smoke sensor is connected with the sensor through a flame-retardant communication cable for a coal mine or in an infrared correlation mode to realize data convergence and instruction issuing, and the at least one intrinsic safety type base station is connected with a ground control center through a communication optical cable to support TCP / IP protocol transmission monitoring data. Dust concentration response is dynamically analyzed in combination with the wind speed change trend, linkage control over wind speed and dust concentration is achieved, the opening degree of an air door can be automatically adjusted or a spraying device can be controlled according to the dust raising trend, the underground dust treatment effect is effectively improved, and the method has the advantages of being high in practicability and improving the automation level of ventilation dispatching.

The utility model belongs to the technical field of special vehicles, and discloses a multifunctional dust suppression vehicle and a dust suppression system. The multifunctional dust suppression vehicle comprises a first chassis, a tank assembly, a spraying assembly and a watering assembly, the tank assembly is arranged on the first chassis and used for loading liquid, the tank assembly is provided with an air filling port, external air filling equipment inflates air into the tank assembly through the air filling port, the spraying assembly is connected with the tank assembly, and the watering assembly is connected with the spraying assembly. Liquid in the tank body assembly can be sprayed out through the spraying assembly, the water spraying assembly is connected with the tank body assembly, and the liquid in the tank body assembly can be sprayed out through the water spraying assembly. According to the multifunctional dust suppression vehicle, large energy storage equipment does not need to be arranged, so that the size of the tank body assembly is correspondingly increased, the water spraying amount of the multifunctional dust suppression vehicle is increased, and the investment cost of blasting operation is reduced; the multifunctional dust suppression vehicle is further provided with a watering assembly, so that the multifunctional dust suppression vehicle can be applied to other operation environments after blasting operation is finished, the utilization rate of the multifunctional dust suppression vehicle is increased, and the use cost is reduced.

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

The invention is applicable to the technical field of coal mining, and provides a dedusting and filtering device for coal mine ventilation, which comprises a dedusting box body arranged on one side of a fan for coal mine ventilation, and the inside of the dedusting box body is divided into a filtering cavity and a purifying cavity by a first partition plate; the air flow guide and primary dust removal assembly comprises a spiral flow guide shaft, an annular spray pipe and a spray head, and the spiral flow guide shaft is rotationally installed in the air inlet pipe through a bearing. The dedusting and filtering device for coal mine ventilation provided by the scheme realizes multi-stage purification of dust-containing airflow, reduces the influence of dust on equipment and personnel, has the characteristics of temperature control, water saving and the like, meets the actual requirements of coal mine ventilation and dedusting, and solves the problem that in the operation process of a current coal mine ventilation system, dust cannot be removed easily. And a large number of dust particles are always carried in the pumped air flow to influence the health of people.

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

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

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

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

The utility model belongs to the technical field of coal mine fire prevention and extinguishing safety, and particularly relates to an intelligent goaf spontaneous combustion monitoring and nitrogen injection device which mainly comprises a circular-truncated-cone-shaped pressure-bearing protective shell, a pressure-bearing plate, a pressure-resistant steel ring, a multi-parameter monitoring probe, a nitrogen injection nozzle and an intelligent control switch. The pressure-bearing plate is located at the top end of the circular-truncated-cone-shaped pressure-bearing protection shell, the compression-resistant steel rings are symmetrically distributed in the circular-truncated-cone-shaped pressure-bearing protection shell, the multi-parameter monitoring probes and the nitrogen injection nozzles are distributed on the periphery, and the multi-parameter monitoring probes are located on the lower sides of the nitrogen injection nozzles. And the intelligent control switch is connected with the nitrogen injection hose. According to the device, accurate division of three zones of spontaneous combustion of the goaf is achieved by laying the monitoring devices in different areas, the change conditions of the three zones of the goaf can be monitored in real time, nitrogen injection in different areas is further achieved, the spontaneous combustion risk of residual coal is accurately prevented and controlled, and the reliability of the goaf is improved. The problems that the spatial law of spontaneous combustion of the residual coal in the goaf cannot be accurately mastered, the nitrogen injection range is small, the nitrogen injection effect is poor, and nitrogen injection is not timely are solved.

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 belongs to the technical field of atmospheric pollution, and particularly relates to dust removal equipment for a mining machine, the dust removal equipment comprises a base, a cyclone separator and a bag-type dust remover which are communicated with each other are fixedly mounted at the upper end of the base, an air inlet of the cyclone separator is further fixedly communicated with an induced draft pipe, an induced draft fan is mounted on the induced draft pipe, and the bag-type dust remover is fixedly connected with the air inlet of the cyclone separator. The induced draft fan is fixedly installed at the upper end of the base, the front end of the induced draft pipe is further fixedly communicated with a dust hood through an elastic telescopic pipe, and the device further comprises a PLC, a dusty gas state detection mechanism, a pre-spraying water conditioning mechanism, an air inlet speed self-regulation mechanism and a feedback regulation mechanism. The power and the ventilation quantity of the induced draft fan are automatically adjusted based on the dust concentration, water is pre-sprayed based on the dust water content, the inlet air speed of the cyclone separator is adjusted based on the ventilation quantity, and the input number of filter bags of the bag-type dust remover is adjusted. The comprehensive functions of efficiently capturing dust, preventing overflow, avoiding equipment blockage, guaranteeing stable operation of dust removal equipment and saving energy are achieved.

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

The invention discloses an extraction and ventilation integrated device in a mine, and relates to the technical field of mine ventilation equipment. The extraction and ventilation integrated device in the mine comprises a cabinet body, the interior of the cabinet body is divided into an extraction cavity and a ventilation cavity which are distributed front and back through a partition plate, a first air inlet communicated with the extraction cavity is formed in the left side wall of the cabinet body, and a first air outlet communicated with the extraction cavity is formed in the right side wall of the cabinet body; the first ventilation pipe is fixedly connected to one side of the interior of the extraction cavity and communicates with the first air inlet; the filter screen is detachably connected to the interior of the first ventilation pipe; the spraying pipe is fixedly connected to the interior of the first ventilation pipe and located above the filter screen; and the cleaning roller is arranged below the filter screen. Through the design of the spraying pipe and the cleaning roller, the filter screen can be cleaned, the filter screen is not prone to being damaged, the cleaning effect is good, and the cleaning roller can be cleaned in real time.

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

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