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公开(公告)号：US11131172B2
公开(公告)日：2021-09-28
申请号：US16759733
申请日：2018-10-29
Applicant: China University of Mining and Technology , XUZHOU BOAN SCIENCE & TECHNOLOGY DEVELOPMENT CO., LTD
Inventor： Baiquan Lin , Yang Zhao , Wei Yang , Qingzhao Li
IPC: E21B43/26 , E21B43/247 , E21B43/00 , E21B43/16
Abstract: A method for extracting gas by fracturing a coal seam through a combination of hydraulic slotting and multi-stage combustion impact wave comprises cutting slots in an impact borehole using a hydraulic slotting equipment to perform pressure relief and permeability enhancement on a coal seam and enlarge a N2 (nitrogen gas) or CO2 (carbon dioxide gas) storage space, injecting a large amount of N2 or CO2 into the borehole by means of a high pressure gas cylinder and a pressure reducing valve through a gas injection and extraction pipe, then injecting a certain amount of methane and dry air into a high-temperature and high-pressure combustion chamber by means of the high pressure gas cylinder and the pressure reducing valve, so that the gases are mixed and combusted to form high-temperature and high-pressure impact wave to push a piston to compress the N2 or CO2, thereby generating a large number of factures on the coal seam around the impact borehole under guiding action of the slots. The impact wave is repeatedly generated to form a multi-stage impact, and the impact of the next stage is based on the impact of the previous stage, so that the fractures on the coal seam around the borehole are further expanded and run through. After the N2 or CO2 is compressed by means of the multi-stage impact, more fracture networks are formed on the coal seam around the borehole under the guiding action of the slots and the fractures, thereby enhancing the borehole-based efficient gas extraction.
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52.发明申请公开(公告)号：US20210262337A1
公开(公告)日：2021-08-26
申请号：US17040552
申请日：2019-11-11
Applicant: China University of Mining and Technology
Inventor： Gongbo ZHOU , Chaoquan TANG , Zhencai ZHU , Gang ZHANG , Zhenzhi HE , Hongwei TANG , Wei LI , Fan JIANG
Abstract: Disclosed are a synchronous movement apparatus of tracks in a wellbore inspection system and a control method thereof. The synchronous movement apparatus includes an upper moving track, a lower moving track, an upper wire rope moving device, a lower wire rope moving device, and a control device; the upper moving track and the lower moving track are correspondingly embedded into an inner wall of a wellbore, and the upper moving track is located above the lower moving track; the upper wire rope moving device is fitted in the upper moving track, and the lower wire rope moving device is fitted in the lower moving track; the upper moving track and the lower moving track have the same structure and each include a track body. A rolling face is arranged on the track body, and grooves are evenly distributed on the rolling face along the extending direction of the track body.
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公开(公告)号：US20210262336A1
公开(公告)日：2021-08-26
申请号：US17043691
申请日：2019-11-11
Applicant: China University of Mining and Technology
Inventor： Gongbo ZHOU , Chaoquan TANG , Zhencai ZHU , Hongwei TANG , Zhenzhi HE , Gang ZHANG , Wei LI , Fan JIANG
Abstract: Disclosed are a wellbore inspection system and method for an ultra-deep vertical shaft. The wellbore inspection system includes a wire rope moving system, inspection robots, a visual image acquisition system, a wireless communication module, a central control system, and an image post-processing system of an upper computer. The wire rope moving system includes a surface wire rope guide rail, an underground wire rope guide rail, a surface wire rope moving device, an underground wire rope moving device, and a wire rope. The visual image acquisition system includes explosion-proof cameras. After image information acquired by the explosion-proof cameras is processed by a lower computer, the processed image is transmitted by a wireless image transmission module to the image post-processing system of the upper computer. The central control system is connected to the inspection robots and the wire rope moving system, and the inspection robots are connected to the central control system.
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公开(公告)号：US20210254465A1
公开(公告)日：2021-08-19
申请号：US16973771
申请日：2019-10-08
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan ZHOU , Jixiong ZHANG , Hao YAN , Meng LI , Jiaqi WANG
IPC: E21C47/02
Abstract: Provided is a method for radially mining open-pit end slope pressed coal, including: L-shaped or U-shaped main tunnel arrangements, and radially mining; branch tunnels are formed by excavating tunnels in directions perpendicular to or obliquely crossing the main tunnel from the L-shaped or U-shaped main tunnel; In the mining method, a coal mining system and a transportation system both adopt a remote control mode, a tunneling machine excavates a tunnel to product coal; a rubber belt conveyor conveys coal; the main tunnel adopts an exhaust ventilation mode, the branch tunnels adopt a blowing ventilation mode; the lengths of the branch tunnels do not exceed a farthest control distance of a remote control system; the length of each main tunnel needs to ensure that all the end slope pressed coal is mined under the premise that the branch tunnels do not exceed the farthest control distance of the remote control system.
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公开(公告)号：US11085860B2
公开(公告)日：2021-08-10
申请号：US16617486
申请日：2018-03-20
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Shengqi Yang , Wenling Tian , Pengfei Yin , Xiangru Liu , Sen Wen
Abstract: A sealing pressing head for a conventional triaxial test of cuboid rocks with pre-existing fissures, and a test method, the sealing pressing head comprising an upper pressing head (14) and a lower pressing head (15); the upper pressing head (14) and the lower pressing head (15) are respectively used for being provided at upper and lower ends of a test sample (10); the upper pressing head (14) comprises a circular portion (2) and a square portion (1) which are provided in sequence from top to bottom; and the lower pressing head (15) comprises a square portion (1), a circular portion (2) and a threaded portion (3) which are provided in sequence from top to bottom.
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Patent Agency Ranking
公开(公告)号：US11085279B2
公开(公告)日：2021-08-10
申请号：US16463358
申请日：2017-09-30
Inventor： Bingxiang Huang , Jiangwei Liu , Xinglong Zhao , Shuliang Chen
Abstract: A stress-transfer method in tunnel with high ground pressure based on fracturing ring. According to the stress source of the tunnel, fracturing by drilling holes to form artificial weaken zones in surrounding rocks, that's named fracturing ring. The fracturing ring is the weaken zone with some width, whose inner boundary is the protective circle. The fracturing ring with small width is called the cutting and interruption circle and the cutting or interruption arc. The radius of the protective circle is determined by setting a certain width of safety coal pillar barriers at the edge of a support body. The radius of the fracturing ring is determined by the surrounding rock structure and the stress conditions as well as the construction technology. Usually, the higher the stress, the wider the radius of the fracturing ring. The cutting and interruption circle or arc could cut off all of the targeted rock which transmits the stress.
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公开(公告)号：US11060384B2
公开(公告)日：2021-07-13
申请号：US16090080
申请日：2017-12-04
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Chuanjie Zhu , Baiquan Lin , Zishan Gao , Ximiao Lu
Abstract: In a method, a gyroscope and an endoscopic camera are first used to investigate coal-seam strike trend, coal-seam dip trend, and coal-seam thickness data of a to-be-extracted area. According to gas extraction standard requirements of a to-be-extracted area, boreholes are then designed and constructed, and trajectories of boreholes are tracked to obtain a correspondence relationship between designed borehole parameters and actual borehole trajectory parameters. Next, drilling parameters are adjusted according to the correspondence relationship between the designed borehole parameters and the actual borehole parameters to construct boreholes at predetermined borehole locations. Subsequently, the boreholes are connected to an extraction pipeline, and gas extraction flow rates and gas extraction amounts per meter of the boreholes are observed. Eventually, other boreholes are designed and constructed according to the adjusted borehole construction parameters and extraction data. After being constructed, the boreholes are connected to perform gas extraction.
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58.发明申请公开(公告)号：US20210198046A1
公开(公告)日：2021-07-01
申请号：US17057112
申请日：2018-10-29
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nong ZHANG , Zhengzheng XIE , Junyao ZHOU , Qun WEI
Abstract: A steel belt conveying apparatus includes upper and lower horizontal conveying portions, left and right inclined conveying chains, a connecting rod frame, an inclined frame, a drive portion, and a height adjustment cylinder. The left inclined conveying chain is separately connected to the upper and lower horizontal conveying portions. The right inclined conveying chain is separately connected to the upper and lower horizontal conveying portions. A top portion of the connecting rod frame is hingedly connected to an upper horizontal frame of the upper horizontal conveying portion. A bottom portion is hingedly connected to a lower frame of the lower horizontal conveying portion. A top portion of the inclined frame is hingedly connected to an upper horizontal drive shaft of the upper horizontal conveying portion, and a bottom portion is hingedly connected to a lower horizontal drive shaft of the lower horizontal conveying portion.
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公开(公告)号：US11034054B2
公开(公告)日：2021-06-15
申请号：US17043686
申请日：2019-10-08
Applicant: China University of Mining and Technology , China Mining & Civil New Material Science and Technology Ltd. , BOXIA MINING TECHNOLOGY LTD.
Inventor： Hong Chang , Junwu Xia , Xiaofang Xiang , Xia Bai
Abstract: A prefabricated stair modular assembly mold comprises a base, a step standard module, an upside module of a lower platform, an underside rotating module of a lower platform, an upside module of an upper platform, an underside rotating module of an upper platform, an underside common module, and an underside adjustment modules. Prefabricated stair molds of different dimensions are formed by means of locating holes provided in the assembling modules, and are then fixed by means of sliding holes at two ends. Further disclosed is a mounting method for said assembly mold. Said assembly mold has high positioning accuracy, and small accumulated error, improving the mounting efficiency of the prefabricated staircase mold.
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公开(公告)号：US20210172319A1
公开(公告)日：2021-06-10
申请号：US16763788
申请日：2019-04-18
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Jixiong ZHANG , Meng LI , A.J.S.(Sam) Spearing , Baiyi LI , Guohao MENG , Hao YAN
Abstract: A multilevel deep well cooling and geothermal utilization system and process. The system has a deep well heat harnessing system, a shallow part heat-exchanging system, and a high-temperature water lifting system. The deep well heat harnessing system has a heat absorbing pipe, a thermally-conductive fluid lifting pipe, a thermally-conductive fluid lowering pipe, temperature sensors, and a water pump. The shallow part heat-exchanging system has a heat-dissipating pipe, a heat-storing water pool, a water intake pump, a water intake valve, a temperature sensor and a liquid level meter. The high-temperature water lifting system has a water discharging pump, a flowmeter, a water discharging valve, and a high-temperature water lifting pipe.
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