17results about How to "Safe mining" patented technology

The invention discloses a coal underground gasification mining front and rear furnace common well continuous coordination propulsion method which comprises the following steps: S1, constructing a gas inlet well and a gas outlet well of a first furnace, and performing gas injection fracturing on a gasification to-be-mined area of the first furnace by using the gas outlet well; s2, coal seam combustion gasification operation is conducted on the gasification to-be-mined area of the first furnace, and synthesis gas is collected through a gas outlet well of the first furnace; meanwhile, a gas outlet well of the second furnace is used for conducting gas injection fracturing on the gasification to-be-mined area of the second furnace; s3, the combustion space area of the first furnace is made to be idle for cooling, meanwhile, the second furnace conducts combustion gasification operation, and the third furnace conducts gas injection fracturing operation; each furnace is subjected to a flow process of gas injection fracturing, combustion gasification, idle cooling and CO2 storage well closing treatment; and S4, completing each flow process in sequence. The upper furnace and the lower furnace carry out difference node follow-up according to the flow process by one flow node, the upper furnace and the lower furnace carry out well sharing, the number of drilled wells is reduced, geological damage is relieved, and the mining efficiency is improved.

The invention discloses a coal underground combustion gasification and carbon dioxide sequestration mining treatment method. The method comprises the steps that S1, gas injection fracturing is conducted, specifically, fracturing gas is introduced through a gas outlet well to enable a coal seam corresponding to a gasification to-be-mined area to form a fracturing seam net; s2, combustion gasification: taking the bottom end of a gas inlet shaft of the furnace to mountain gas and the bottom end as a mining direction, discharging gas from the furnace, and discharging synthesis gas; and S3, sealing and closing the well: injecting carbon dioxide serving as displacement gas into the space to be sealed through the gas inlet well, collecting mixed gas through the gas outlet well, and then injecting high-pressure CO2 gas into the space to be sealed for sealing treatment. According to gas injection fracturing of a single furnace, a horizontal fracturing gas injection channel is adopted for carrying out gas injection fracturing treatment on the gasification to-be-mined area of the furnace located above to form a fracturing crack net, the upper furnace well and the lower furnace well can be jointly subjected to difference node follow-up according to the flow process and the difference of one flow node, and the sealing difficulty of the well and a combustion space area is reduced; and the mining efficiency is improved.

The invention discloses a laneway risk section multi-scale geological prediction method based on air-well-hole combination, and relates to the technical field of laneway risk section multi-scale geological prediction, and the method comprises the steps: carrying out the geological exploration of the earth surface of an area where two parallel mine laneways are located before mining, and defining a risk geological section in combination with the geological disaster characteristics; carrying out aviation electromagnetic detection on the earth surface above the corresponding risk geological sections of the two parallel roadways, and judging whether a geological body between the two roadways has a water-containing body or a water guide structure according to a detection result; according to the judgment result, oblique drilling is conducted from the risk-free roadway to a geologic body behind the mining face of the high-risk roadway, drilling parameters in the drilling process are obtained, and drilling rock slag is collected; on the basis of the drilling rock slag, the rock lithology, the unfavorable geologic body type and the abnormal degree in the geologic body between the two roadways are judged in combination with the spectrum technology; and sound wave testing is carried out in the hole, the integrity of the rock mass is judged by combining the drilling parameters and the sound wave velocity value, and multi-scale accurate geological prediction of the laneway risk section is completed.

The invention discloses a multi-thin ore body multi-mining-area mining structure and a continuous mining method. The multi-thin ore body multi-mining-area mining structure comprises a slope ramp, a segmented haulage roadway, an air return raise, filling slurry, an unmined ore body, a mining area, a filling retaining wall, a connecting channel and a staged haulage roadway. According to occurrence conditions of the ore body, the ore body is divided into a plurality of subsections in a stage, then the subsections are divided into a plurality of layers, the multiple ore bodies are divided into a plurality of mining areas in the layers in the trend of the ore body, stoping work of all the mining areas is propelled at the same time, and the working procedures of rock drilling, explosive charging, ore removal, filling and the like are sequentially carried out in the mining areas. On the basis of the collaborative mining principle, multi-section parallel operation is implemented in the stages, continuous stoping is conducted on a plurality of mining areas in all sections, the thin ore body group multi-section multi-mining-area collaborative continuous mining technology is achieved, the stoping period is greatly shortened, the mine production capacity and the stoping efficiency can be effectively improved, and safe and orderly connection during collaborative mining of the multiple mining areas is ensured.

The present application provides a kind of coal mine with the integrated equipment of digging anchor, it includes body, supporting device and adjustment component;Supporting device includes support frame and guard plate component, support frame is connected with body and can be rotated around the straight line of the width direction of body relative to body, support frame includes the first frame body and second frame body connected, second frame body can be rotated around the straight line of the length direction of body relative to first frame body, guard plate component is arranged in second frame body;Adjustment component includes first driver, the output end of first driver is drivingly connected with second frame body, first driver is used to drive second frame body to rotate relative to first frame body, so that guard plate component adapts to the inclination angle of roadway roof.The present application can realize the efficient integration of tunneling and supporting by the cooperative work of body, supporting device and adjustment component, so that the equipment can flexibly adapt to various complex conditions of coal mine roadway, provide a safer and more efficient solution for coal mining.

The invention discloses a mining infrared water body detection and early warning device, and relates to the technical field of coal mine water disaster monitoring and early warning, and the mining infrared water body detection and early warning device comprises an infrared detection system, a detector structure attachment system, a detection data mapping system, a detection data analysis system and a detection device energy supply system; the infrared detection system is used for detecting a top plate or a bottom plate, a left side and a right side through long and short combined advanced drill holes in the direction of a roadway through a detector and an infrared probe; the detector structure attachment system is combined with a hydraulic support or a heading machine or a coal mining machine through a modular mounting accessory to form a real-time water inrush detection zone; and the detection data mapping system comprises a communication cable, detection and acquisition data processing software and data mapping software, and is used for generating an image from the data acquired by the infrared detection system. The advanced water detection technology, the infrared detection technology and the software data intelligent processing technology are combined for detection, monitoring and early warning of coal mine water disasters, and the water inrush prediction accuracy is improved.

The invention belongs to the field of hydrometallurgy, and particularly relates to a swelling inhibitor for ionic rare earth clay mineral leaching mining and application. Magnesium sulfate is used as a leaching agent, and sodium citrate with different concentrations is compounded, so that obvious expansion inhibition effects are respectively shown on different clay minerals. During application, the corresponding appropriate concentration of the swelling inhibitor can be selected according to the types of clay minerals in the ionic rare earth ore so as to achieve the optimal swelling inhibition effect.

The utility model relates to the technical field of tight oil and shale oil exploitation, and discloses a resistance and friction reducing device for tight oil and shale oil exploitation well drilling, which comprises a shell, a resistance and friction reducing mechanism is arranged in the shell, the top of the shell is fixedly connected with a fixed seat, the fixed seat is internally in threaded connection with a drill bit base, and the drill bit base is in threaded connection with the drill bit base. Three supporting frames are fixedly connected to the end, away from the shell, of the drill bit base at equal intervals in a circumferential mode, drill bits are rotationally connected to the supporting frames, a spray head is arranged between every two adjacent supporting frames and fixedly installed on the drill bit base, and a conveying channel communicating with the spray heads is formed in the drill bit base. By arranging the resistance and friction reducing mechanism, supply and injection of lubricating liquid are accurately controlled, in the tight oil shale oil exploitation process, it is ensured that a layer of lubricating film is always kept between drilling equipment and the stratum, friction resistance in the drilling process can be effectively reduced in a continuous lubricating mode, and the drilling efficiency is improved.

The present application relates to the technical field of coal mine underground transportation equipment, and particularly relates to a fully mechanized coal mining face crossheading single rail train system and advancing method, wherein the fully mechanized coal mining face crossheading single rail train system comprises a trailer, a train set and a pipe cable telescopic device connected in sequence, the tail of the pipe cable telescopic device is connected with a reversed loader, a track is laid under the train set, the train set travels along the track, the trailer is connected with the track through a cross connector and drags the track to advance; the advancing method comprises the steps of pulling and moving the track, pulling and moving the train set, advancing the working face and cyclically advancing. The present application realizes the rapid and continuous movement of the train through the long-distance alternate movement of the track and the train, without the need of frequently disassembling and laying tracks and the need of winch steel wire rope traction, can effectively reduce the labor intensity and operation time of workers and improve the safety of train operation.

The present invention discloses a coal mine solid intelligent filling support robot, including eight systems consisting of a mechanical body system, a perception system, an AI video analysis system, an analysis and decision system, a software system, a control drive system, a power system, and a human-computer interaction system. The eight systems implement adaptive filling support, parameter perception, working condition identification, process self-driving, programmable, remote control operation, and digital twin functions one by one or in groups, and execute the operation logic according to the mining and filling process self-driving to complete the complete self-driving process. It realizes autonomous operation of adaptive support and filling, ensures that the quality of support and filling meets the requirements, effectively improves the efficiency of filling operations, and realizes green, safe, intelligent, and efficient solid filling mining. It can replace traditional coal miners to implement underground coal mining and filling operations, and is particularly suitable for underground solid intelligent filling mining sites in coal mines.

The invention discloses a multi-scale geological prediction method for risky sections of shafts and tunnels based on air-well-hole combination, which relates to the technical field of multi-scale geological prediction for risky sections of shafts and tunnels. A pre-mining geological survey is conducted on the surface of the area where two parallel mine tunnels are located, and the risky geological sections are delineated in combination with geological disaster characteristics; an aero-electromagnetic detection is conducted on the surface above the risky geological sections corresponding to the two parallel tunnels, and whether the geological body between the two tunnels has a water-containing body or a water-conducting structure is judged according to the detection result; according to the judgment result, an oblique drilling is conducted from the risk-free tunnel to the geological body behind the mining face of the high-risk tunnel, and the drilling parameters in the drilling process are obtained, and the drilling slag is collected; based on the drilling slag, the lithology of the rock mass, the type of unfavorable geological body and the degree of abnormality in the geological body between the two tunnels are judged in combination with spectral technology; an acoustic wave test is conducted in the hole, and the integrity of the rock mass is judged in combination with the drilling parameters and the acoustic wave velocity value, so as to complete the multi-scale accurate geological prediction for the risky sections of shafts and tunnels.

The application discloses a filling mining method of steeply inclined coal seam and relates to the technical field of coal mining. The method comprises the following steps: dividing each stage of the steeply inclined coal seam into upper layers, middle layers and lower layers; mining the upper layers, the middle layers and the lower layers; and forming a filling mining method of the steeply inclined coal seam with a sandwich type protection structure and a Z type filling structure during the mining process. The sandwich type protection structure is formed by consolidating a coal pillar, surrounding rock and concrete together, which can effectively protect the coal pillar from damage and maintain the stability of the mined-out area. The Z type filling body structure is formed by combining a reserved coal pillar, lower concrete and an inclined concrete column. The Z type filling body structure has a reserved coal pillar on the top and the bottom, and compared with other filling body structures, the Z type filling body structure formed by combining mining and filling is safer. The filling mining method of the steeply inclined coal seam can maintain the stability of the mined-out area and is beneficial to safe mining.

The invention discloses a steeply inclined coal seam mining working face arrangement method. The method comprises the steps that a target coal seam mining working face is sequentially divided into a horizontal section, an arc section and a pseudo-inclined section in the coal seam advancing direction; according to a preset target reduction angle of the working face inclination angle, in combination with coal seam parameters of the target coal seam and support parameters of the hydraulic support, a pseudo-dip angle enabling the working face inclination angle to meet the target reduction angle after pseudo-dip arrangement is carried out on the working face is calculated and determined; the lengths of the horizontal section, the arc section and the pseudo-inclined section correspond to the number of the required hydraulic supports; and arranging the working surfaces according to a calculation result to form a pseudo-inclined working surface consisting of a horizontal section working surface, an arc section working surface and a pseudo-inclined section working surface. Therefore, the mining efficiency of the bottom coal seam can be improved while the inclination angle of the mining working face is reduced.

The application discloses a method for reinforcing the well wall of a hydrate exploitation well in a sea area by using mineralization deposition, and comprises the following steps: arranging a spray hole on the pipeline of the exploitation well and extending the spray hole to the outside of the well wall; arranging a plurality of pipelines along the well wall inside the well wall for conveying branched polyethylene imine (BPEI) solution and modified nano calcium carbonate dispersion; before hydrate exploitation, conveying the reagents from an exploitation platform to a specified reinforcement depth, and spraying the two reagents from the spray hole by using a high-pressure pump at a certain time interval and pressure; the two reagents are fully reacted in the soil layer around the well wall to generate mineralization deposits and improve the strength of the soil layer; the method can be repeated according to requirements to form multiple mineralization deposits to achieve the required reinforcement strength; the method is convenient to operate, the reinforcement process is clear, and the effect is remarkable, and the method fills the blank in the field of real-time reinforcement of the well wall of a hydrate exploitation well, and helps long-term, safe and efficient exploitation of hydrate energy, and has remarkable technical advantages.

The present invention provides a method and device for testing three-dimensional mining stress of surrounding rock of coal mine tunnels, comprising: based on multiple groups of model construction parameters, taking compressive stress-volume strain benchmark change information as a standard, constructing a single-unit uniaxial compression model, wherein the compressive stress-volume strain benchmark change information is determined based on the compressive stress-volume strain benchmark curve of the rock mass in the goaf; based on the single-unit uniaxial compression model and three-dimensional information of the surrounding rock of the coal mine tunnel, constructing a rock mass constitutive model within the collapse zone, so as to test the dynamic evolution information of the three-dimensional stress of the tunnel surrounding rock according to the rock mass constitutive model within the collapse zone.

This invention provides a physical simulation experimental device and method for fine exploration of water-bearing sections in underground rock strata. The device includes a water storage tank connected to a water pump. The water pump is connected to one end of multiple water supply valves via a one-way valve. Each water supply valve has a corresponding rock chamber at its other end. These rock chambers are vertically mounted on the sidewall of a simulated borehole pipe. Flange end caps are installed at both ends of the simulated borehole pipe. A return water inlet sealing head is installed on the flange end cap at the tail end of the simulated borehole pipe. The return water inlet sealing head is connected to the water storage tank via a return water valve. An energy storage and voltage regulator is also installed between the water storage tank and one end of the multiple water supply valves. An armored optical fiber cable for acoustic wave sensing is coaxially installed inside the simulated borehole pipe. This invention can effectively simulate various geological and hydrological conditions in actual underground rock strata environments. By analyzing the variation patterns of acoustic signals, it improves the accuracy of exploration of water-bearing sections, providing reliable technical support for coal mine water hazard prevention and safe production.

The invention discloses a coal face magmatic rock invasion pulse hydraulic fracturing efficient rock crushing control method, and particularly relates to the technical field of coal face control. An interference identification model is constructed based on microseismic event anisotropy ratio and spectrum offset coefficient characteristic parameters, and adaptive regulation and control and operation strategy adjustment of pulse frequency are realized through real-time monitoring and dynamic grading of interference degrees, so that energy accumulation and disaster risks caused by misjudgment are avoided; and meanwhile, a control strategy is continuously optimized based on operation feedback, and the accuracy and adaptability of fracturing response are improved, so that efficient, controllable and safe crack induction and crushing control are realized in a magmatic rock invasion body area, and the coal mining efficiency and the operation safety level are remarkably improved.