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

IPC: E21F3/00 ,  E21B36/00 ,  F24T10/20

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.

公开(公告)号：US20210148228A1

公开(公告)日：2021-05-20

申请号：US16626328

申请日：2019-04-01

Applicant: China University of Mining and Technology ,  XUZHOU ZHONGKUANG BACKFILLING & MINING TECHNOLOGY CO.,LTD

Inventor： Jixiong ZHANG ,  Qiang ZHANG ,  Wenyue QI ,  Meng LI ,  Jianfeng SUN ,  Guohao MENG

IPC: E21C41/18 ,  E21F15/00

Abstract: The present invention discloses a mine exploitation, separation and filling and X exploitation mode, including four “exploitation, separation and filling and X” exploitation modes, namely an “exploitation, separation and filling and retaining” exploitation mode, an “exploitation, separation and filling and treatment” exploitation mode, an “exploitation, separation and filling and extraction” exploitation mode, and an “exploitation, separation and filling and control” exploitation mode. The selection of the “exploitation, separation and filling and X” exploitation mode is determined by actual engineering needs. A goaf filling rate is designed to meet the actual engineering needs of the mine, solve the technical problems in mine resource exploitation, and realize the objective of green, harmonious and safe exploitation of coal resources. Compared with an original “exploitation, separation and filling” exploitation mode, the “exploitation, separation and filling and X” exploitation mode is more systematic and comprehensive and is beneficial to engineering promotion and application.

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

IPC: E21D15/48 ,  E21D13/00 ,  E21D15/00 ,  E21F15/02 ,  E21C41/18 ,  G01B21/08

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.

公开(公告)号：US20200300088A1

公开(公告)日：2020-09-24

申请号：US16088437

申请日：2017-11-02

Applicant: China University of Mining and Technology

Inventor： Qiang ZHANG ,  Jixiong ZHANG ,  Zhongya WU ,  Wenyue QI ,  Hong YAN ,  Meng LI

IPC: E21D15/60 ,  E21D15/55

Abstract: Provided is a base mechanism of a single prop capable of being unloaded at reduced pressure, including a base bottom plate and two wedge-shaped support blocks, where one of the wedge-shaped support blocks serves as a fixed wedge-shaped support block and is welded onto the base bottom plate, and the other of the wedge-shaped support blocks serves as a movable wedge-shaped support block and is connected to the fixed wedge-shaped support block by using a screw rod and a nut. The present invention can effectively unload the single prop at reduced pressure or remove the single prop in a contracted manner, is of a simple structure, is convenient to operate, has a good use effect, overcomes the technical problem that it is difficult to unload a single prop at reduced pressure in this technical feature, and is widely applicable in this technical field.

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

IPC: E21D15/60 ,  E21D15/20

CPC classification number: E21D15/60 ,  E21D15/20

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.