19 results about "Coal mine dust" patented technology

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 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 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.

This invention relates to the field of coal mine safety production and occupational health protection technology, and discloses a dust monitoring and automatic dust suppression control system for coal mining environments, including a PM sensor, a central control unit, a dust suppressant spraying facility, a feedback optimization mechanism, and an electrical control system. The PM sensor is a high-sensitivity laser scattering sensor with automatic dust removal and temperature compensation functions, deployed at preset intervals to achieve real-time monitoring of dust concentration at multiple points. The central control unit, based on IoT and mechatronics technology, integrates data from multiple heterogeneous sensors such as dust concentration, temperature, and humidity to construct a dynamic spraying decision model with lithology identification capabilities, introducing a working condition correction coefficient α (α=k₁・S+k₂・R) to dynamically set a 4α mg / m³ trigger threshold. The dust suppressant spraying facility sprays environmentally friendly dust suppressant to form a fine mist that captures dust. The feedback optimization mechanism adjusts the spraying interval based on the concentration decay data after spraying. The electrical control system ensures safe operation through relay and contactor isolation design. This invention solves the problems of low efficiency, poor adaptability, water waste and easy equipment damage in traditional dust suppression methods, and achieves precise, efficient and safe dust control in coal mines, ensuring the health of workers and production compliance.

The application discloses a coal mine dust in-situ combustion utilization and working face refrigeration system and method, a coal dust collection and classification subsystem for obtaining combustible coal dust with a predetermined particle size, a coal dust combustion and heat energy conversion subsystem for burning the combustible coal dust and preparing high-temperature hot water, an energy regulation unit for temporarily storing the high-temperature hot water and outputting high-temperature hot water with a stable temperature after regulation, a hot water absorption type refrigeration and working face cooling subsystem for cooling a coal mine working face by using the high-temperature hot water as a driving heat source, and an automatic control module for analyzing real-time temperature and coal dust concentration data of the working face 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, so that adaptive coal dust combustion and working face refrigeration are realized. The method realizes waste utilization and effectively reduces energy consumption by in-situ resource utilization of coal mine dust and cooling of the working face.

This application relates to a non-powered light scattering method for detecting coal mine dust concentration, belonging to the technical field of dust concentration detection. It includes a main body with a detection channel inside, and mounting cavities for a photodiode, a laser, and a light trap. The photodiode is located at the top of the detection channel, while the laser and light trap are located on opposite sides of the detection channel. It also includes a glass plate on the cavity wall of the mounting cavity, a vibration component for shaking dust off the glass plate, and a cleaning component for absorbing dust in the detection channel when the vibration component is activated. A drive component for raising and lowering the cleaning component is connected below it. The main body has a cleaning hole for the cleaning component to enter the detection channel, and a hidden door is rotatably installed at the top of the cleaning hole. A dust collection chamber is also provided inside the main body for collecting dust, thereby reducing the difficulty of cleaning the air path of the device. Afterwards, light scattering dust concentration detection is performed, ensuring the accuracy of the dust concentration detection.

The utility model relates to the field of mine safety and environmental protection technology, and specifically discloses a rotary three-dimensional spraying device, two fixed frames in the form of a ring, coaxial fixed sheets arranged in the middle of the two fixed frames, through holes being arranged in the middle of the fixed sheets, a plurality of fixed rods in the form of a circular array, connecting the fixed sheets and the inner walls of the fixed frames, a main pipe being arranged in and fixed in the through holes of the two fixed sheets, a plurality of groups of spraying pipes in parallel circular array being arranged on the outer wall of the main pipe, the two ends of the spraying pipes being fixedly connected with the two fixed frames, a plurality of nozzles being equidistantly arranged on the outer wall of the spraying pipes, and a plurality of branch pipes connecting the main pipe and the spraying pipes and being used for conveying air-water mixed fluid, three-dimensional space dead angle coverage being realized through air-water linkage, the coal mine dust diffusion problem being completely solved, and the device having the remarkable advantages of efficient dust reduction, no spraying blind area, simple structure and low cost.

This invention proposes a domain-adaptive method for dehazing coal mine dust and fog images with partial parameter sharing. The method includes: constructing a coal mine dust and fog image dataset; building a domain-adaptive dehazing network framework with partial parameter sharing; supervised training of a loss function for synthetic dust and fog images; enhancement of real dust and fog images followed by unsupervised adversarial training; designing an enhancement module for real dust and fog images followed by supervised training; and obtaining the dehazed coal mine dust and fog images. The method provided by this invention effectively alleviates the problem of poor generalization ability of deep networks trained on synthetic data on real coal mine dust and fog images, thus improving the visual effect of the images.

The utility model provides a kind of coal mine dust removal ventilation equipment, it includes: box, vertical partition is fixedly installed in box interior, box top end inside is respectively fixedly installed with lower partition and upper partition, upper partition side is inserted with frame and is penetrated, frame top is equipped with the compacting mechanism located in the box, the box inside fixedly connected with fixed pipe in the other side of upper partition. The present application adopts the ventilation of box when coal mine dust removal, airflow is guided using partition, and cooperate atomization dust removal to capture dust in air, set frame and can be used for filter material storage, facilitate further filtration dust, ensure dust removal effect, and after long-term use, filter material cleaning can be realized using the reflux of water source, the disassembly of frame can be realized by compacting mechanism, subsequent coal mine dust removal ventilation is facilitated, and multiple filter screens are set for dust and impurity filtration, stored in box bottom, facilitate subsequent cleaning, and the collected water source can be reused, improve the use performance of coal mine dust removal ventilation equipment.

The application discloses a kind of coal screening with spray dust-settling device, belong to coal mine dust pollution prevention and control field.The device includes dust hood, and the dust hood one end inside is surrounded and is provided with front cohesive nozzle group;The dust hood other end inside is surrounded and is provided with discharge nozzle group;The dust hood inside two sides are provided with to spray curtain nozzle group;The dust hood top is provided with negative pressure suction cavity, and the negative pressure suction cavity is connected with negative pressure component.The application in the application, front cohesive nozzle group is fixedly connected with the inner wall of dust hood, and nozzle is inwardly inclined to form convergent mist curtain.To spray curtain nozzle group is arranged in the inside two sides of dust hood, and left and right two rows of nozzles are horizontally opposite and spray, form two opposing mist walls, and transverse airflow cancels each other, dust cannot overflow to cover wall.The discharge nozzle group discharge capacity is less than front cohesive nozzle group, and small-angle push is sent along coal flow.Make that dust-settling effect no longer depends on external environment, and the controllability of dust-settling process is stronger, and better dust-settling effect is achieved.

The present application relates to a kind of multi-device multi-parameter coupling intelligent control system for fully mechanized coal face dust prevention system, belong to coal mine dust control technical field.The system multi-device coupling central control, single-device multi-parameter control module and multiple dust reduction equipment.Dust reduction equipment is aimed at different dust sources, such as coal cutter cutting coal, hydraulic support moving frame, etc.Single-device multi-parameter control module can control corresponding equipment parameters, and communicate with central control.Multiple device coupling central control combines dust concentration and personnel location information, dynamically adjusts each device parameter, and sets three types of dust concentration control target.Through building the dust reduction efficiency and parameter relationship model of different dust sources, intelligent control is realized.For example, for coal cutter drum cutting coal dust source, corresponding model is established respectively.

The present application relates to an improved KNN interpolation method for coal dust concentration time series data, belonging to the technical field of coal mine safety monitoring. The method solves the problem of missing values of coal dust concentration time series data caused by sensor failure, transmission interruption or environmental interference, analyzes the missing situation of coal dust concentration time series data based on the sensor sampling period, determines the timestamp position of the missing data, establishes the K nearest neighbors based on the time distance from the recent data set and calculates the interpolation result based on the time distance, establishes the K nearest neighbors based on the historical similarity distance from the historical data set and calculates the interpolation result based on the historical similarity, and finally calculates the final interpolation result by weighted average through the comprehensive time distance interpolation and historical similarity interpolation. The present application can effectively improve the accuracy and reliability of data completion, guarantee the integrity of coal dust concentration data, and provide solid data support for the prediction and early warning of coal dust disaster and safety production management.

This invention relates to a rapid, pretreatment-free detection method for breathable free silica on membranes based on FTIR transmission spectroscopy, belonging to the field of dust monitoring. This method establishes the RCS quality within a 5.78 mm spot diameter and the relationship between the RCS and the 800 cm⁻¹ area. ‑ ¹Standard algorithm for characteristic absorption peaks; targeting kaolinite, the most abundant interfering mineral in coal mine dust, utilizing its 915 cm⁻¹ peak... ‑ ¹The absorption peak was established at 800 cm⁻¹ ‑ ¹ An algorithm for subtracting interference. To address the non-uniform distribution of respirable dust deposited on the filter membrane surface, a piecewise function non-uniform distribution model was constructed. Based on this, a rapid algorithm was proposed that can calculate the total RCS mass of the entire filter membrane using only 10 key measurement points. The entire detection process of this invention eliminates the need for pretreatment steps such as strong acid digestion and high-temperature ashing, shortening the single detection cycle to less than 10 minutes, providing a practical and feasible technical approach for rapid on-site RCS detection in the workplace.

The present application belongs to the technical field of coal mine dust prevention, and discloses a mine-used gas control type constant-ratio high-pressure self-adding dust-settling agent device and method. The system comprises a shell, a liquid adding cylinder, a pneumatic four-way ball valve and a two-position five-way reversing valve fixedly arranged in the shell. The liquid adding cylinder is divided into two cavities, each cavity is provided with a piston, and each piston divides the cavity into a water injection cavity and a liquid adding cavity. The water inlet of the pneumatic four-way ball valve is connected with a water source, two working outlets are connected with two water injection cavities, and the water inlet and drainage of the two water injection cavities are controlled through the pneumatic four-way ball valve. The dust-settling agent is divided into two paths and respectively communicated with the left liquid adding cavity and the right liquid adding cavity, and after being discharged, is mixed with the water source to form a mixed liquid passage. The two-position five-way reversing valve is connected with a gas source and controls the water passage reversing of the four-way ball valve. The method comprises the steps of initial shunting, alternating water injection driving, alternating dust-settling agent suction and drainage, constant-ratio mixing and magnetic control pneumatic reversing. The present application can realize continuous constant-ratio addition of dust-settling agent, uniform mixing, good dust-settling effect and high safety.

The present application relates to the technical field of coal mine dust removal, and particularly relates to a dust removal device and method for a coal mine tunneling working face. The present application comprises a box, a fan, an interception device and a dust cleaning device. One end of the box is provided with a dust suction port. The fan is fixedly installed inside the box. The interception device comprises a mounting frame and a ceramic filter plate. The mounting frame is fixedly installed inside the box and located on the side of the fan facing the dust suction port. The ceramic filter plate is detachably installed in the mounting frame. The dust cleaning device is fixedly installed on the top of the box and inserted into the box. The dust cleaning device comprises a gas injection port. The gas injection port is located inside the box and on the side of the ceramic filter plate facing the dust suction port. The fan enables air carrying coal dust to enter the box through the dust suction port of the box. The ceramic filter plate intercepts the coal dust, and the coal dust is adsorbed on the surface of the ceramic filter plate, greatly increasing the cleaning efficiency of the coal dust and greatly improving the dust removal effect.

This utility model discloses an effective dust removal device for coal mine conveying, relating to the field of coal mine dust removal technology. It includes a welding frame, with multiple sheet metal parts fixedly connected to both sides of the inner wall of the welding frame. Corresponding surfaces of these sheet metal parts are connected to movable shafts via rotating shafts. Correction racks are fixedly connected to the outer walls of these movable shafts, and a conveyor belt is sleeved on the outer walls of these shafts. A correction groove is provided on the inner wall of the conveyor belt. Limiting components are fixedly connected to the bottom surfaces of the sheet metal parts, and a limiting magnetic strip is fixedly connected to one side of the limiting component. When the conveyor belt deviates to one side, the rounded corners at the ends of the correction racks contact the rounded corners of the inner walls of the correction grooves, providing a guiding effect and forcing the conveyor belt to reset upon contact with the rounded corners. Simultaneously, the multi-point engagement of the correction racks and the correction grooves further restricts the lateral displacement of the conveyor belt.