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1.发明申请公开(公告)号：US20210277779A1
公开(公告)日：2021-09-09
申请号：US17253126
申请日：2019-06-24
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Jixiong ZHANG , Yang JU , A.J.S. (Sam) Spearing , Meng LI , Nan ZHOU , Weiqing ZHANG
Abstract: Provided are a system and a method for monitoring bearing compression rate of a filler in a coal mine gob area. An ground information processing system, a vibration source control system, and a monitoring system are arranged on the ground according to a buried depth of the filler in the gob area. The vibration source control system generates vibration, and transmits a signal to the filler. The monitoring system on the ground receives different reflected waves according to different elasticities of the fillers under different compaction degrees. Final data is transmitted to the ground information processing system for data processing. The monitoring of the filler starts when the filler is filled in the gob area; the filler is gradually compacted. The filler is monitored until the thickness of the filler does not change. Finally, a bearing compression rate formula is utilized to calculate the bearing compression rate of the filler.
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Patent Agency Ranking
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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3.发明申请公开(公告)号：US20200318480A1
公开(公告)日：2020-10-08
申请号：US16763426
申请日：2019-02-22
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan ZHOU , Hengfeng LIU , Meng LI , Zhongya WU , Jixiong ZHANG
Abstract: A method of recovering a room-and-pillar coal pillar by using external replacement supports. In the recovery of a room-and-pillar coal pillar, a cement material wall is formed by performing pouring around a coal pillar having a width to height ratio of less than 0.6, by means of a single-pillar sack arrangement technique, such that a coal pillar resource may be mined while a wall made from a cement filling material supports an overlying stratum. After mining is complete, a coal pillar goaf region is filled with the cement filling material, and after the cement filling material solidifies and is stable, the single pillar can be recovered.
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4.发明申请公开(公告)号：US20190085691A1
公开(公告)日：2019-03-21
申请号：US16084971
申请日：2016-12-01
Applicant: China University of Mining and Technology
Inventor： Jixiong ZHANG , Nan ZHOU , Wenyue QI , Qiang ZHANG , Meng LI
Abstract: The present invention discloses a process method for withdrawing and recovering a mechanical constant-resistance single prop, specific steps involving: detecting a working resistance and a degree of deformation of a mechanical constant-resistance single prop, releasing lug clamp bolts of a recoverable base, knocking a lower portion of a cylinder body of the mechanical constant-resistance single prop to disengage the mechanical constant-resistance single prop from the recoverable base, and dismantling the mechanical constant-resistance single prop. Parts are classified and recovered based on degree of deformation thereof. By means of the foregoing method, a process of withdrawing and recovering a mechanical constant-resistance single prop is standardized, simple and fast disengagement of the mechanical constant-resistance single prop is achieved, and parts that can still be used can be sufficiently recovered and reused, thereby achieving the objectives of saving energy and reducing costs.
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公开(公告)号：US20200378256A1
公开(公告)日：2020-12-03
申请号：US16632543
申请日：2019-04-01
Applicant: China University of Mining and Technology , XUZHOU ZHONGKUANG BACKFILLING & MINING TECHNOLOGY CO., LTD.
Inventor： Jixiong ZHANG , Wenyue QI , Qiang ZHANG , Kai SUN , Nan ZHOU , Hengfeng LIU
Abstract: The present invention discloses a mine exploitation, separation, filling and treatment exploitation method, including main sources of gangue on a small-volume gangue exploitation working face and gangue reducing measures; system layout, equipment and separation technology for coal gangue separation; system layout, equipment and production technology for filling synergistic caving type coal efficient stoping; pretreatment and pre-control measures for environmental influence before and after gangue filling; and design principle and design steps of the mine “exploitation, separation, filling and treatment” exploitation method. The method not only solves the problem of long-distance transportation of gangue, reduces the lifting cost of underground gangue and relieves the pressure of mine auxiliary lifting and ground coal washing plants, but also may effectively treat coal mine gangue, reduce the surface stacking area of coal gangue, reduce the damage to the ecological environment of a mine and protect an ecological environment. Furthermore, a gangue filling and coal efficient stope face has high single production efficiency, may meet the requirements of modern mines for production capacity, and application prospects are wide.
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公开(公告)号：US20200378255A1
公开(公告)日：2020-12-03
申请号：US16603832
申请日：2019-02-22
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Nan ZHOU , Jiaqi WANG , Jixiong ZHANG , Kai SUN , Meng LI
Abstract: An internally injected replacement support room-type coal pillar recovery method is provided. During the recovery the room-type coal pillars with an aspect ratio greater than 0.6 are divided into two parts: reserved coal pillars and pre-mined coal pillars. After the mining of the pre-mined coal pillars, a cemented filling material is injected into a goaf surrounded by the reserved coal pillars, and is stabilized to replace the coal pillars for support, and the reserved coal pillars are recovered. A mechanical model of the reserved coal pillars in a support overburden stage is established based on the Winkler beam theory, to obtain displacement and stress conditions of a roof of the reserved coal pillar in a support stage. A theoretical reserve-width of the reserved coal pillars is obtained according to a first strength theory of the roof and a criterion of ultimate strength of the reserved coal pillars.
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