公开(公告)号：US12287445B1

公开(公告)日：2025-04-29

申请号：US18939876

申请日：2024-11-07

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Xianhui Wang ,  Qiang Wu ,  Chunsheng Liu ,  Fei Chen ,  Jia Zhao ,  Zhuangjie Cui

IPC: G01V1/46 ,  G01V1/50

Abstract: A coal rock interface directional detection device based on elastic waves includes: a probe body including an elastic wave receiving device and an elastic wave excitation device spaced set at the top; a protective tube with one end connected to the adapter. The protective tube includes a collection circuit board inside the protective tube, and the collection circuit board is electrically connected to the elastic wave receiving device and the elastic wave excitation device; a sleeve, installed outside the protective tube, with one end connected to the side of the probe body near the adapter and with the other end connected to the side of the protective tube away from the adapter; and a control host, wirelessly connected with the acquisition circuit board. A coal rock interface directional detection method based on elastic waves applied in the coal rock interface directional detection device is also disclosed.

公开(公告)号：US12241371B1

公开(公告)日：2025-03-04

申请号：US18760362

申请日：2024-07-01

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Donghui Yang ,  Qiang Wu ,  Hao Li ,  Junhao Ren ,  Zeyang Liu ,  Jia Zhao ,  Zilong Yuan

IPC: E21C25/60 ,  E21C41/18

Abstract: Disclosed are an integrated mining method and an integrated mining system of coal breaking, coal extraction and water circulation in a U-well. The integrated mining system includes a first ground facility unit, a second ground facility unit, a jet unit and an extraction unit. The first ground facility unit is configured to transport jet fluid to the jet unit. The jet unit is configured to break a coal seam in a sub-segment to obtain broken cinders. The extraction unit is configured to extract a coal-water mixture. The second ground facility unit is configured to receive the coal-water mixture. In response to determining that an extraction of the sub-segment is complete, the jet unit and the extraction unit is configured to move to a next sub-segment using powers provided by the first ground facility unit and the second ground facility unit.

公开(公告)号：US12196076B1

公开(公告)日：2025-01-14

申请号：US18750211

申请日：2024-06-21

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Weihong Yang ,  Qiang Wu ,  Xinjiang Wei ,  Xuejun Wang ,  Kai Pang ,  Xuan Xiao ,  Xue Liu

IPC: E21B49/00 ,  E21B7/04 ,  E21B21/06 ,  E21B33/138

Abstract: Disclosed is a grouting and water blocking method for a hard rock stratum. The grouting and water blocking method include the following steps. At first, hydrogeological information and coal seam information of a hard rock stratum is obtained. Then, a drilling trajectory of the hard rock stratum is determined based on the hydrogeological information and the coal seam information. Later, at least one drilling device is determined corresponding to the drilling trajectory based on types of multiple rock layers contained in the hard rock stratum. After that, the multiple rock layers contained in the hard rock stratum are drilled sequentially according to the drilling trajectory using the at least one drilling device. At last, in response to determining there is a water leakage area, the water leakage area is grouted.

公开(公告)号：US12091972B1

公开(公告)日：2024-09-17

申请号：US18596373

申请日：2024-03-05

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Aoshuang Mei ,  Qiang Wu ,  Huaming Wei ,  Yashuai Cui ,  Shihao Meng ,  Weihong Yang ,  Kai Pang ,  Liang Yang ,  Yidi Xing

IPC: E21C41/18 ,  E21C39/00 ,  E21F17/18

CPC classification number: E21C41/18 ,  E21C39/00 ,  E21C2100/00 ,  E21F17/18

Abstract: Disclosed are a method and a related device for determining a development status of a separation layer in a coal mine. The method includes: obtaining surface subsidence variation data of the coal mine within a preset time interval, rock stress variation data of a caving zone of the coal mine and water pressure variation data; determining a height decrease of the caving zone based on the rock stress variation data and the water pressure variation data; and determining the development status of the separation layer of the coal mine based on the height decrease and the surface subsidence variation data.

公开(公告)号：US12091971B2

公开(公告)日：2024-09-17

申请号：US18346104

申请日：2023-06-30

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yifan Zeng ,  Shihao Meng ,  Qiang Wu ,  Lu Wang ,  Shijie Tang ,  Xuedong Kan ,  Chao Yu ,  Han Bao

IPC: E21B47/11 ,  E21B33/124 ,  E21C39/00 ,  E21F16/00

CPC classification number: E21C39/00 ,  E21B33/1243 ,  E21B47/11 ,  E21F16/00

Abstract: A tracer diffusion device includes: a first container, a second container, a drilling pipe, a unidirectional driving device, and a bidirectional driving device. The first container holds a first fluid containing a tracer. The second container holds a second fluid. A first end of the drilling pipe is connected to the first container; a second end of the drilling pipe is extended into a borehole and equipped with a first sealing capsule and a second sealing capsule. A plurality of through holes are arranged on the drilling pipe between the first sealing capsule and the second sealing capsule. The unidirectional driving device is arranged on the drilling pipe, for injecting the first fluid from the first container into the borehole between the first sealing capsule and the second sealing capsule. The bidirectional driving device is arranged between the second container and the first sealing capsule.

公开(公告)号：US11365624B2

公开(公告)日：2022-06-21

申请号：US17036015

申请日：2020-09-29

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING ,  WUHAN CHANGSHENG MINE SECURITY TECHNOLOGY LIMITED

Inventor： Yifan Zeng ,  Qiang Wu ,  Chunsheng Liu ,  Lina Xing

IPC: G01V3/26 ,  G01V3/34 ,  G01V3/38 ,  G01V9/02 ,  E21B47/13 ,  E21B47/003 ,  E21F17/06 ,  E21F17/18

Abstract: Disclosed is a system and a method for monitoring water inrush, including: a host terminal, a field host, at least one controller and at least one electrode array. Each electrode array is placed in one borehole and to detect electric field signals of surrounding rocks around the borehole; each controller connects with one electrode array and is to control the electrode array to carry out a high-density induced polarization measurement on the surrounding rocks; the field host connects with the controller and is to send control signals to the controller, receive and process the electric field signals output by the electrode array; and the host terminal connects with the field host and is to receive the electric field signals processed by the field host, determine changes on apparent resistivity and apparent chargeability of the surrounding rocks, and determine whether there exists water inrush according to the changes.

公开(公告)号：US10795051B2

公开(公告)日：2020-10-06

申请号：US16134297

申请日：2018-09-18

Applicant: WUHAN CHANGSHENG MINE SECURITY TECHNOLOGY LIMITED ,  CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Qiang Wu ,  Liu Liu ,  Yifan Zeng ,  Fengjuan Tao ,  Chunsheng Liu

IPC: H04N5/225 ,  G01V8/02 ,  H04N5/232 ,  H04N7/18 ,  G01V3/08

Abstract: Disclosed is a three-dimensional digital virtual imaging device for stratigraphic texture of borehole core, wherein the probe depth counting pulley is mounted on the lifting wire frame, the output shaft of the motor is configured to drive the reel to rotate, and one end of the cable is connected to the cable transfer node of the retractable reel, the signal input end of the borehole imaging trajectory measuring probe of the on-site imaging host is electrically connected to one end of the cable through the cable transfer node of the retractable reel, the cable is wound on the retractable reel, a retractable line is controlled by the retractable reel, the cable is extended and retracted on the probe depth counting pulley, the probe depth counting pulley records the length of the retractable line of the cable, the depth feedback signal output end of the depth counting pulley is connected to the depth feedback signal input end of the on-site imaging host, the motor control signal output end of the on-site imaging host is connected to the control signal input end of the motor, and the signal output end of the borehole imaging trajectory measuring probe is connected to the other end of the cable. It can automatically generate borehole video, two-dimensional digital virtual borehole core image and 3D borehole trajectory in real time.

公开(公告)号：US11781429B1

公开(公告)日：2023-10-10

申请号：US18332606

申请日：2023-06-09

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING ,  University of Mining and Technology-Beijing Inner Mongolia Research Institute

Inventor： Yifan Zeng ,  Qiang Wu ,  Weihong Yang ,  Zhaolai Hua ,  Yanping Miao ,  Lu Wang ,  Kai Pang ,  Lei Yang ,  Aoshuang Mei ,  Shihao Meng ,  Han Bao ,  Xue Liu ,  Xuan Xiao

IPC: E21D11/10 ,  E21D11/38 ,  E21B33/13

CPC classification number: E21D11/38 ,  E21B33/13 ,  E21D11/10

Abstract: A method for blocking mine water inrush includes: grouting first slurry into an interface between the quaternary aquifer and the weathered bedrock aquifer in a fracture grouting manner until a first preset condition is met; forming a first water-resisting cushion after the first slurry is solidified; drilling a curve branch drill hole in the surface horizon downward; grouting second slurry into the curve branch drill hole in a downward grouting manner until a second preset condition is met; forming a second water-resisting cushion after the second slurry is solidified; grouting third slurry onto a top of the first water-resisting cushion in an upward grouting manner until a third preset condition is met; forming a third water-resisting cushion after the third slurry is solidified; wherein the third water-resisting cushion is located on the top of the first water-resisting cushion.

公开(公告)号：US11459849B1

公开(公告)日：2022-10-04

申请号：US17730031

申请日：2022-04-26

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING ,  Shaanxi Coal Caojiatan Mining Co., Ltd.

Inventor： Yifan Zeng ,  Qiang Wu ,  Zhaolai Hua ,  Rui Wang ,  Zhenzhong Pang ,  Lu Wang ,  Yang Lv ,  Xin Du ,  Kai Pang ,  Aoshuang Mei

IPC: E21B33/13 ,  E21B27/00 ,  E21F17/00

Abstract: A sealing method for a drilled hole in three zones of overburden comprises: blocking the fissure zone and the caving zone with at least one filling bag; and transporting prepared cement slurry to the drilled hole through a hollow drill pipe, so as to block the curved subsidence zone. The three zones of overburden comprise a fissure zone, a caving zone and a curved subsidence zone.

公开(公告)号：US09897585B2

公开(公告)日：2018-02-20

申请号：US14801917

申请日：2015-07-17

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Qiang Wu ,  Lei Niu ,  Shucai Li ,  Shouqiang Liu ,  Yifan Zeng

IPC: G01N17/00 ,  G01N33/24

CPC classification number: G01N33/24

Abstract: A geomechanical fluid-solid coupling testing device for water inrush from coal mine collapse column, which has a testing bed and a collapse column simulating device, wherein the testing bed has a box type structure with an opening at its top and is provided therein with multiple layers of similar materials in which a tunnel or a mining face can be dug out; and the collapse column simulating device comprises a plexiglass barrel with openings at both its top and bottom, the plexiglass barrel is provided at its top opening with a plexiglass lifting device and a hard plastic baffle, and the plexiglass lifting device is provided with a lifting level which is connected with a lifting rope.