124results about How to "Improve mining efficiency" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

The invention provides a novel coal mining method for an open-air well-to-well worker. The novel coal mining method comprises the following steps: stoping by a slope coal mining machine; filling a mining cave, determining a filling process, selecting one of pumping filling, waste rock throwing machine filling or side upper part drill hole conveying filling in the filling process, and selecting filling materials according to a ratio of waste rock to concrete; carrying out slope stability calculation and analysis and slope monitoring, and carrying out mechanical analysis and calculation by adopting a limit equilibrium method and a finite element method. The invention provides a mining process system and complete equipment, including automation of coal mining and transportation, realization of automatic operation and connection of coal, mining and transportation equipment, improvement of coal mining efficiency and efficiency of a filling system, and realization of key technologies and processes of efficient paste filling, and provides an overlying strata stability monitoring control technology and equipment. The intelligent mining site is realized, the scientific and reasonable cooperation of mining, filling and slope stability monitoring is realized, and the connection is orderly and efficient.

The embodiment of the invention provides a method and device for monitoring upward and downward movement of a scraper conveyor based on point cloud registration, and the method comprises the steps: setting a target on the wall of a transportation roadway, obtaining a depth image of a target region, and carrying out the filtering and hole filling of the depth image of the target region, and obtaining a processed depth image of the target region; based on a world coordinate system established by taking image acquisition equipment as an original point, carrying out coordinate conversion on pixel coordinates and depth values in the depth image of the processed target area to obtain a three-dimensional point cloud; sequentially carrying out denoising, segmentation, down-sampling and clustering division processing on the three-dimensional point cloud to obtain a first target point cloud; based on the obtained target template point cloud and the first target point cloud, template point cloud features and target point cloud features are extracted; registering the target point cloud features and the template point cloud features for multiple times to obtain registered target point cloud; and based on the registered target point cloud and the world coordinate system, the upward-sliding and downward-sliding offset of the scraper conveyor is determined.

The invention discloses a mining plan making method and system, and relates to the technical field of automatic management, and the method comprises the steps: obtaining a mine image and environment data; extracting multi-dimensional features of the mine image, and fusing the multi-dimensional features to obtain fused features; inputting the fusion features into a recognition model to obtain a mineral recognition result; combining the environment data with the mineral identification result to form a mine environment-resource distribution map; and inputting the mine environment-resource distribution map into the mining model to obtain a mine mining plan. According to the mining plan based on machine vision and a large model, real-time and high-definition monitoring of the mine environment is achieved by integrating the high-precision camera shooting function and the advanced video processing technology, subjectivity and errors of manual judgment are reduced, the mining process is accelerated, optimal configuration and efficient utilization of resources are achieved, and the mining efficiency is improved. And higher production efficiency and economic benefits are brought to mine enterprises.

The invention discloses a CO2 geological storage coordinated shale oil and geothermal energy green development system and method. The system comprises a geothermal power station located on the ground, a ground cable, a CO2 injection device, a CO2 conveying pipeline, a CO2 / shale oil separation device, a shale oil conveying pipeline and a shale oil storage tank. Wherein the geothermal power station is connected with the CO2 injection device through a ground cable, the CO2 injection device is connected with the CO2 / shale oil separation device through a CO2 conveying pipeline, and the CO2 / shale oil separation device is connected with the shale oil storage tank through a shale oil conveying pipeline; through multiple utilization and innovative closed circulation of CO2, an efficient energy development system is built, the recovery ratio of shale oil is increased, geological storage of CO2 and geothermal energy development are achieved, energy consumption and carbon emission are reduced, and therefore the environmental pollution risk is effectively reduced, and unification of economic benefits and environmental benefits is achieved.

The invention discloses a planned cutting curve issuing control method based on a predictive coal cutting technology, and belongs to the technical field of coal mine collection. Comprising the following steps: acquiring coal mining machine operation cutting data; a mathematical model is established based on the predicted coal cutting data, and a next cutting prediction curve is obtained; monitoring the running state and environmental parameters of the coal mining machine in real time, and generating an optimal cutting planning curve path; an operator judges whether the cutting curve path is optimal or not, if not, the above steps are executed circularly, and if yes, the following steps are executed; and issuing the generated optimal cutting planning curve path to the coal mining machine. The invention provides a planned cutting curve issuing control method based on a predictive coal cutting technology, which can realize generation of a planned cutting curve of a next cut based on historical cutting data, can edit and issue in advance according to geological data, reduces manual intervention in a production process, improves mining efficiency, realizes visualization of a predictive coal cutting curve, and is suitable for popularization and application. And the production process can be controlled, and the mining stability and safety are improved.

The invention belongs to the field of underground mining, and relates to a method for arranging a bottom structure of a multi-layer stope arranged along the trend of an ore body, which comprises the following steps of: arranging a one-step mining rock drilling roadway, arranging a shared ore removal roadway, arranging a peach-shaped ore pillar, arranging a one-step mining cutting roadway, arranging a one-step mining inclined crossing roadway, arranging a two-step mining rock drilling roadway and arranging a two-step mining cutting roadway. According to the technical scheme, the problem that a bottom structure cannot be arranged in a two-step mining field is solved; a two-step mining field has a bottom structure, the ore removal efficiency is improved, the stoping period is shortened, ore removal is cleaner, ore loss is reduced, the opportunity of remote ore removal is reduced, and the risk that equipment is buried is reduced.

The invention belongs to the technical field of oil and gas well perforation, and relates to a high-speed communication method and system for single-core cable perforation. The method comprises the following steps: performing low-frequency modulation on underground perforation data; performing high-frequency modulation on underground logging data; synthesizing carrier signals; the driving power of the carrier synthesis signal is amplified, so that the carrier synthesis signal is transmitted to the ground end on the single-core cable; the ground terminal carries out carrier signal conditioning on the carrier synthesis signal and then carries out amplification processing; carrying out carrier signal separation, and respectively outputting a low-frequency modulation signal and a high-frequency modulation signal; and outputting perforation data and logging data. According to the invention, perforation signals and underground logging data can be transmitted on the single-core cable at the same time, and the exploitation efficiency of an oil-gas well is improved; according to the single-core cable perforation communication system, continuity and low delay characteristics of perforation operation signals are kept, discrete data can be selectively transmitted, the efficiency of single-core cable perforation communication is improved, and mutual influence of perforation or logging communication faults is effectively avoided.

The utility model provides a cutting pick assembly protection device, which comprises an expanding digging plate, a screw and a screw hole, the screw hole is arranged on the side wall of a high-position end cover ring, and the expanding digging plate is fixed on the high-position end cover ring by installing the screw in the screw hole. And a wear-resistant welding layer is arranged on the peripheral surface of the expanding digging plate. The expanding excavation plate is convenient to mount and easy to dismount, and the cutting teeth are protected. The wear-resistant welding layer is arranged on the outer surface of the expanding excavation plate, so that the contact area between the expanding excavation plate and the coal seam is increased, the expanding excavation plate participates in the rock breaking process of the coal wall, the expanding excavation performance of the end disc is improved, and the mining efficiency is improved.

The utility model discloses a combustible ice exploiting device based on a coiled tubing, which comprises a coiled tubing assembly and a combustible ice exploiting assembly, the combustible ice exploiting assembly is arranged at the lower end of the coiled tubing assembly, and the combustible ice exploiting assembly can move to an underground combustible ice exploiting well section along with the movement of the coiled tubing assembly. A mining monitoring assembly, a hydraulic control pipeline and a power supply control cable are arranged on the outer side wall of the coiled tubing assembly; according to the continuous oil pipe, the function of rapidly and stably exploiting combustible ice is achieved, the exploiting time and the exploiting speed can be remotely and accurately controlled on the ground in the whole exploiting process, and the function of measuring a DAS signal, a DTS signal and a DPS signal on the inner side and the outer side of the continuous oil pipe body in real time in the exploiting process of the combustible ice is achieved; the operation safety of the device in the whole combustible ice exploiting process is guaranteed, the exploiting accuracy and exploiting efficiency of the combustible ice are improved, and the device is simple in structure, high in practicability and suitable for being widely popularized and used.

The invention discloses a deep-sea mining plume inhibition technology using an AUV (Autonomous Underwater Vehicle) to add a flocculating agent, which comprises a mine car, a solution mixing container is arranged in the mine car, a stirrer is arranged on the solution mixing container, a second flow pump is arranged on the left side of the solution mixing container, and one end of the second flow pump is connected with the solution mixing container through a conveying pipeline; the other end of the solution mixing container is connected with a water pumping pipeline through a conveying pipeline; a jet flow pump is arranged on the left side of the solution mixing container; a flocculating agent is accurately added through the AUV, aggregation and sedimentation of suspended particulate matter are promoted, formation and diffusion of plume are effectively inhibited, pollution of deep-sea mining to the marine environment is reduced, the AUV can conduct autonomous navigation and control operation underwater, the system can adapt to the complex deep-sea environment, and the service life of the system is prolonged. The application scene of the technology is wide, the flocculant can be used for reducing plume generation, the drag reducer can also be used for reducing water jet resistance, and the mining efficiency is improved.

The invention relates to the field of open-pit coal mine mining, in particular to an open-pit coal mine full-continuous coal mining layered mining system which comprises an excavating unit, a coal mining unit, a coal mining unit, a coal mining unit, a coal mining unit, a coal mining unit and a monitoring unit, and the excavating unit is used for carrying out continuous layered excavating operation on a coal seam of an open-pit coal mine; the crushing unit is used for screening and crushing excavated coal briquettes and ores and comprises a mounting frame, a shell is mounted on the mounting frame, a filtering cavity, a crushing cavity and a deposition cavity are sequentially formed in the shell from top to bottom, a feeding port and a discharging port are formed in the side walls of the two sides of the filtering cavity respectively, and a power assembly is mounted at the bottom of the deposition cavity; a crushing assembly is mounted in the crushing cavity, and the power assembly is used for providing driving force for the crushing assembly; the system further comprises a transfer unit, a transportation unit and a control unit used for monitoring the operation state of each unit. A plurality of functional units such as excavating, screening, crushing, transferring, transporting and intelligent monitoring are integrated, and an efficient, automatic and intelligent mining system is formed.

The invention discloses a stope ore breaking method for combined blasting of presplitting blast holes and downward fan-shaped blast holes. The method comprises the step that an ore body to be mined is divided into stopes of two steps according to the mining sequence. A stope connecting roadway, a rock drilling roadway and an ore removal roadway are constructed in the two stopes respectively, and a long anchor cable and anchor rod supporting system is adopted for providing pre-supporting. A cutting transverse roadway and an undercutting transverse roadway are constructed in a rock drilling roadway of a stope in the first step, a first cutting groove is formed through blasting, and a necessary free face and a compensation space are provided for subsequent downward fan-shaped blast hole blasting. Downward fan-shaped blast holes and presplitting blast holes are constructed in the rock drilling roadway of the first-step stope, and meanwhile only the presplitting blast holes are constructed in the rock drilling roadway of the second-step stope. And the downward fan-shaped blast holes and the presplitting blast holes of the stope in the first step are filled with explosives, and blasting is conducted in sequence. And after blasting is completed, gas flowing through the ore removal roadway is used for cleaning the stope so as to discharge foul gas, then residual ore is removed, and the goaf is filled.

The utility model discloses a lotus root harvesting all-in-one machine which comprises a machine body frame used for enabling the lotus root harvesting all-in-one machine to float on the water surface; the advancing device is arranged on the machine body frame and used for enabling the machine body frame to advance on the water surface; the collecting device is arranged on the machine body frame; the digging device comprises a rack, a lifting mechanism, a supporting frame, bearing seats, supporting optical shafts, a supporting seat, a high-pressure water gun and a power system, the rack is arranged on the machine body frame, the lifting mechanism is arranged on the rack, the supporting frame is arranged on the lifting mechanism, the two bearing seats which are oppositely arranged are arranged on the supporting frame, and the supporting optical shafts are arranged in the two bearing seats in a sleeved mode. A supporting seat is arranged on the supporting optical shaft, a high-pressure water gun is arranged on the supporting seat, the supporting optical shaft is connected with a rotary driving mechanism, the power system comprises a water suction pump, and the water suction pump is connected with the high-pressure water gun through a water outlet pipeline. Harvesting efficiency is remarkably improved through lifting and rotating design of the high-pressure water gun, working breadth is increased, and meanwhile high-pressure water jet is further attached to the surfaces of the lotus roots to scour the lotus roots.

The invention relates to the technical field of ocean engineering deep-sea mining equipment, in particular to a multi-metal nodule desliming device suitable for deep-sea mining, which consists of a mineral aggregate input connecting flange, a mineral aggregate input transition cabin, a mineral aggregate enrichment cabin, a waste discharge cabin, a desliming screen, a screen fixing frame, a screen fixing screw and a waste discharge guide plate. The mineral aggregate input connecting flange is located at the front end of the multi-metal nodule desliming device and used for being connected with the multi-metal nodule collecting and conveying device, the mineral aggregate input transition cabin is tightly connected with the mineral aggregate input connecting flange, and a square opening is formed in the rear end of the mineral aggregate input transition cabin. The shape of the front end of the mineral aggregate input transition cabin is the same as that of the mineral aggregate input connecting flange.

The present invention discloses an optimization method and system for geothermal resource exploitation schemes, and relates to the technical field of geothermal resource exploitation. The optimization method comprises: obtaining original data: conducting geological surveys on the target area, obtaining geological data and geothermal resource data of the geothermal area, and using the geological data and geothermal resource data as original data. The present invention divides the target area into several No. 1 areas, evaluates and optimizes the scheme using simulation calculations, and adjusts the layout of the exploitation wells and the reinjection wells and the equipment parameters to achieve a more efficient exploitation effect or a lower cost. Although the calculation accuracy is reduced by dividing the area for calculation, it is a simulation calculation itself, so that the results of the simulation calculation can be effectively referenced, and at the same time, it provides convenience for the calculation of subsequent optimization schemes, and reduces the possibility of calculation errors.

The invention relates to the technical field of skid-mounted filtering and separating devices, in particular to a skid-mounted filtering and separating integrated device which comprises a gravity separator, a filtering separator and a produced liquid buffer tank. The device further comprises an electric telescopic rod, the electric telescopic rod is installed at the top end of the filter separator, the output end of the gravity separator is connected with the filter separator, the output end of the filter separator is connected with a produced liquid buffer tank, the telescopic end of the electric telescopic rod is connected with a movable frame, and the movable frame is movably connected into the filter separator. A liquid distribution pipe is arranged between the movable frames, a cleaning nozzle is arranged at the rear end of the liquid distribution pipe, two groups of filter frames are arranged at the rear end in the filter separator, and filter screens are arranged in the filter frames; two-stage separation is achieved, the density difference of a gas phase, a solid phase and a liquid phase is fully utilized, the replacement frequency of a filter element can be reduced, the operation cost is reduced, solid-liquid impurities in feed gas are efficiently removed, and the influence of the feed gas on operation of a compressor is reduced.

The invention belongs to the technical field of handheld electric agricultural harvesting equipment, and discloses a handheld electric astragalus membranaceus excavating machine which comprises a main body, a soil turning assembly is arranged at the bottom end of the main body in a telescopic mode, and the soil turning assembly is in transmission connection with a driving assembly arranged on the main body and used for driving the soil turning assembly to work; the driving assembly comprises a motor arranged on the main body, the output end of the motor is in transmission connection with the input end of a gearbox arranged on the main body, and the output end of the gearbox is in transmission connection with the soil turning assembly; the soil turning assembly comprises a hydraulic sleeve arranged on the main body, and the output end of the hydraulic sleeve is in transmission connection with a soil turning shovel used for soil turning excavation. The device is compact and light in structure, easy to operate, convenient to use, capable of being used by one person, time-saving and labor-saving, the radix astragali digging efficiency is improved, manpower consumption is reduced, damage to radix astragali roots is reduced, the quality of the dug radix astragali is improved, and application and popularization are convenient.

The invention provides an iron ore deep hole downward fan-shaped hole arrangement mining method which comprises the following steps: step 1, performing stope arrangement, arranging an upper vein-following transportation roadway and a rock drilling chamber at the upper part of a stope for ore transportation and drilling operation, and arranging a lower vein-following transportation roadway, an ore removal gate roadway and an ore loading access road at the lower part of the stope for ore transportation and loading; 2, cutting transverse roadways and cutting wells, correspondingly arranging bottom and top cutting transverse roadways at the center or the end part of the stope to form a blasting free surface, digging the cutting wells in the hanging wall of the ore body, and penetrating through the bottom and top cutting transverse roadways to provide a space for blasting operation; and thirdly, fan-shaped deep holes are arranged, and the downward fan-shaped holes of the deep holes are formed in the chamber to replace original vertical hole arrangement mining, so that the method can better adapt to the geological conditions, the mining efficiency is improved, a larger ore body area can be covered, the ore collection rate is improved, and the mining cost is reduced.

The utility model discloses mechanical plugging layer-by-layer oil extraction device, including flow guide pipe, the one end of flow guide pipe is connected with the upper packer, and the other end is connected with the lower packer, and the three are all connected through upper and lower joint, the upper packer is used for plugging the upper end of the well section of plugging object, and the lower packer is used for plugging the lower end of the well section of plugging object, the upper packer, the lower packer and the flow guide pipe inside all are provided with gas flow guide passage, make the dissolved gas of lower oil layer free come out in turn through lower packer, flow guide pipe, upper packer and enter the oil jacket annular space of upper portion, finally discharge from wellhead. The utility model discloses device solved the gas lock problem of existing technology when sealing upper and extracting lower, can be used as the plugging tool of oil layer when sealing upper and extracting lower of oilfield long stop oil well, high water cut oil well, can improve oil well mining efficiency, reduce development cost, obtain greater economic benefit.

This invention relates to a method for extracting natural gas hydrates and the perfluorocarbon extractant used therein. The perfluorocarbon extractant comprises a viscosity modifier, an interface modifier, and a solvent; the viscosity modifier includes perfluorotributylamine; and the interface modifier includes perfluoropolyether and / or perfluorobutyric acid. The perfluorocarbon extractant of this invention exhibits high solubility for methane, strong hydrophobic properties, and stable physicochemical properties. During natural gas hydrate extraction, it allows methane released after hydrate decomposition to preferentially enter the extractant phase in a dissolved state and migrate within the reservoir, thereby achieving single-phase liquid extraction of methane. This technical approach can weaken or even eliminate the Jamin effect and seepage blockage caused by gas-liquid two-phase mixing, reduce reservoir flow resistance, and improve the extraction efficiency and continuous gas production capacity of natural gas hydrates in silty clay reservoirs.

The invention provides a high-temperature and high-pressure wellbore tubular column corrosion monitoring system and monitoring method. The system comprises a monitoring probe (1), a flow guide cap (2), a left shell seat (3), a battery (4), a circuit board (5), a compensation test piece (6), a right shell seat (8), a protective cover (9), a main shell (14), a communication port (15), a pipe clamp clip (18), a fan-shaped thin-wall keel (13), a protective cover (20) and a vent groove (22). The invention further relates to a monitoring method of the system. Through unique sealing design, combination of the embedded probe and the compensation test piece and accurate control of mutual excitation of direct current / alternating current, accurate monitoring in severe environments such as high temperature and high pressure is realized, the reliability of the system is effectively improved, and the service life of the system is effectively prolonged. The defect that the system is difficult to adapt to severe working conditions is overcome, the monitoring precision and the durability of the system are greatly improved, and the system is of great significance to improvement of oil and gas field exploitation efficiency and safety.

The utility model relates to the technical field of oil extraction, in particular to an efficient temporary plugging anti-overflow device. Comprising an upper connector, the upper connector is fixedly and hermetically connected with a valve connector, the lower end of the valve connector is fixedly and hermetically connected with a filter pipe and an outer cylinder, the filter pipe is located on the inner side of the outer cylinder, the valve connector is provided with an air hole communicated with an annular cavity between the outer cylinder and the filter pipe, and a check valve is installed in the air hole; the lower end of the filter pipe is fixedly and hermetically connected with a lower pipe located inside the outer cylinder, the lower end of the lower pipe is blocked and fixedly connected with the lower end of the outer cylinder through a lower connector, and a temporary blocking plate is detachably, fixedly and hermetically connected into the lower connector. Through soluble temporary plugging, multi-stage filtering, gas-liquid separation and modular sealing design, the device has the core advantages of efficient overflow prevention, rapid production, airlock prevention, low maintenance cost and the like, has both environmental protection property and economical efficiency, and is suitable for oil well operation under complex working conditions.

The utility model discloses a coal mine electromechanical transmission transportation fixing device which comprises a placing table, a sliding rail is arranged on the placing table, a fixing table is connected to the sliding rail in a sliding mode, a sliding block used in cooperation with the sliding rail is arranged at the bottom of the fixing table, a first pulley is rotationally connected to the bottom of the fixing table, and fixing grooves are symmetrically formed in one side of the fixing table. The placing table is fixedly connected with a fixing plate, one side of the fixing plate is rotatably connected with a twisting block, a torsion spring is arranged between the fixing plate and the twisting block, one side, far away from the twisting block, of the fixing plate is rotatably connected with a rotating disc, and the twisting block is fixedly connected with the rotating disc. According to the coal mine motor transportation device, the situation that the coal mine motor is not firmly fixed and falls off due to bumping or complex road conditions in the transportation process is avoided, when the coal mine motor is transported to a road surface without rails, the coal mine motor can be continuously conveyed to a designated place through the pulleys, manual transportation is omitted, and meanwhile the mining efficiency is improved.

The application discloses a kind of based on flow pattern recognition's deep sea mining multiphase flow particle delivery prediction and regulation method, the method includes: by acquisition equipment periodic acquisition pressure in pipeline, flow, bubble or droplet volume fraction, solid particle volume fraction in different positions;According to pipe diameter and the gas-liquid ratio obtained by calculation, mixed flow velocity, call pre-built flow pattern division algorithm, distinguish bubble flow, slug flow, vortex, annular flow;Solve the gas-liquid discrete unit volume fraction of any diameter in different flow patterns;According to the gas-liquid discrete phase volume fraction, obtain the delivery speed of solid particles in multiphase flow;Whether the solid particle delivery speed obtained is judged to reach the best interval, according to the result control multiphase flow in pipeline flow pattern or gas-liquid ratio, to adjust the delivery speed of solid particles.The present application can improve the efficiency of seabed mineral exploitation, and avoid the dangerous flow pattern formed by unreasonable gas-liquid distribution ratio, efficiency and safety are taken into account.

The invention provides a construction method of an offshore fixed storage device. The construction method comprises the steps that a cylindrical storage device is machined and manufactured in a steel structure factory; shipping and transporting to a construction sea area; the floating crane lifts and turns over the storage device; the floating crane is matched with the vibratory hammer to insert and beat the cylindrical storage device to a stable seabed; mud is sucked in the material storage device, and impurities are cleaned; leaking stoppage bottom sealing concrete in the material storage device is poured; and finally, a storage device vertical ladder stand, a top opening operation platform and a top opening sealing cover plate are installed. The material storage device can be quickly constructed and fixed under the condition of a complex sea area, the investment of construction equipment and resources is small, the efficiency is high, and the construction cost can be reduced. The storage device is filled with leaking stoppage concrete, it is ensured that a waterproof storage space is formed between the structure and an external sea area, the structure is safe, and the device can be used for civil air defense engineering under special conditions.

The invention discloses mining equipment, a stabilizing method and a repositioning method of the mining equipment and an anchoring device for slope mining in the technical field of slope mining mineral resources. The device comprises an anchoring body, a first power linear motion system and a second power linear motion system. A cutting edge is arranged at one end of the anchoring body, the other end of the anchoring body is detachably connected with the drilling machine, the drilling machine is installed on the first power linear system, the anchoring body is further provided with a guide sleeve keeping in the vertical direction, a supporting piece is arranged between the anchoring body and the second power linear motion system, and the second power linear motion system drives the supporting piece to move. In the pulling-out state, the anchoring body is pulled out of the vein, and the supporting piece is pulled up; in the drilling state, the first power system drives the drilling machine to enable the anchoring body to drill into the vein along the axis, meanwhile, the second power linear motion system positions the supporting piece and drives the guide sleeve to move, and accurate vertical positioning is achieved. The device can stabilize the mining equipment and improve the mining efficiency.

The application provides a gob roof impermeable system and an impermeable method thereof, which comprises a hanging unit arranged at the back side of a working face, an impermeable layer unit for laying on the top of a filling body, and a control unit in signal connection with the impermeable layer unit, wherein the impermeable layer unit is arranged on the hanging unit; the control unit is arranged to obtain a pushing speed parameter of the working face and an injection speed parameter of the filling body, and to control the laying speed of the impermeable layer unit according to the parameters, so as to realize dynamic matching of the laying speed of the impermeable layer unit, the pushing speed of the working face and the injection speed of the filling body. The impermeable layer assembly is laid synchronously with the working face advancing, and is adjusted in real time through the control assembly to adapt to the roof deformation and the dynamic change of the filling body; the system is integrated in a hydraulic support to realize integrated operation of "mining-filling-impermeable", without additional downtime, and the mining efficiency is improved; through reliable impermeability, the sealing efficiency of carbon fixation and filling is greatly improved, and the mine realizes negative carbon mining.

The invention discloses an anti-impact downhole packer for perforation, and particularly relates to the field of oil and gas well development. A limiting sliding sleeve, a disc spring and a damping rubber cylinder are arranged on the damping mechanism; a centralizing mechanism is arranged at the upper end of the damping mechanism and consists of a centralizer, a spring piece and a centralizer friction plate; a deblocking mechanism is arranged in the righting mechanism and consists of a lower mandrel and a track transfer ring; the setting mechanism is arranged at the upper end of the righting mechanism, the two mechanisms are connected through the orbital transfer ring, and the setting mechanism is provided with an open hoop, a clamping sliding sleeve and a slip; a sealing mechanism is arranged at the upper end of the setting mechanism and consists of two rubber sleeves, and a top shoe and a bottom shoe are arranged above and below the rubber sleeves; an anchoring mechanism is arranged at the upper end of the sealing mechanism, and a hydraulic anchor slip and an elastic limiting structure are arranged at the upper end of the sealing mechanism; when facing underground perforation, the anti-impact underground packer for perforation can be automatically started, the influence of high-strength vibration and impact generated by underground perforation on the performance of the packer is prevented, the setting efficiency of the packer is improved, and the drilling cost is reduced.

This invention discloses a method for methane extraction and closed-loop carbon fixation in coal seams using hot flue gas-driven combustion-explosion fracturing. First, each horizontal branch well is divided into sections, and perforations are constructed in each section. Then, CH4 is used in each section. 4 Combustion-explosive fracturing technology utilizes in-situ synergistic combustion-explosion reactions to generate gas impact perforation fractures, allowing them to further develop and expand into a fracture network. Then, hot flue gas is sequentially injected into each horizontal branch well. Due to its high temperature, the hot flue gas promotes CH4 (chemical oxygen demand) in the coal seam. 4 Gas desorption, and CO in hot flue gas 2 SO 2 NO 2 Due to its competitive adsorption advantage, it can displace a large amount of CH4 adsorbed in extra-thick coal seams. 4 Gas, then hot flue gas and CH 4 The gas continues to be utilized in a closed loop, improving the efficiency of coal seam methane extraction while simultaneously achieving hot flue gas sequestration. Through this continuous closed-loop utilization process, the efficiency of methane combustion and fracturing, hot flue gas sequestration, and CH4 extraction in various areas of extra-thick coal seams is maximized. 4 Extraction efficiency.