公开(公告)号：US11459849B1

公开(公告)日：2022-10-04

申请号：US17730031

申请日：2022-04-26

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

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

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

摘要： 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：US12091972B1

公开(公告)日：2024-09-17

申请号：US18596373

申请日：2024-03-05

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

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

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

CPC分类号： E21C41/18 ,  E21C39/00 ,  E21C2100/00 ,  E21F17/18

摘要： 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

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

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

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

CPC分类号： E21C39/00 ,  E21B33/1243 ,  E21B47/11 ,  E21F16/00

摘要： 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

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

发明人： Yifan Zeng ,  Qiang Wu ,  Chunsheng Liu ,  Lina Xing

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

摘要： 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

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

发明人： Qiang Wu ,  Liu Liu ,  Yifan Zeng ,  Fengjuan Tao ,  Chunsheng Liu

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

摘要： 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

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

发明人： 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分类号： E21D11/10 ,  E21D11/38 ,  E21B33/13

CPC分类号： E21D11/38 ,  E21B33/13 ,  E21D11/10

摘要： 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：US09897585B2

公开(公告)日：2018-02-20

申请号：US14801917

申请日：2015-07-17

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

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

IPC分类号： G01N17/00 ,  G01N33/24

CPC分类号： G01N33/24

摘要： 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.

公开(公告)号：US12055040B1

公开(公告)日：2024-08-06

申请号：US18413509

申请日：2024-01-16

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

发明人： Yifan Zeng ,  Weihong Yang ,  Qiang Wu ,  Xuan Xiao ,  Kai Pang ,  Xinjiang Wei ,  Xue Liu ,  Han Bao

IPC分类号： E21B7/06

CPC分类号： E21B7/068 ,  E21B7/061 ,  E21B7/064

摘要： A curvature controllable directional drilling device is disclosed. The drilling device includes: a drill bit, a power unit, a rigid bending unit, a bendable outer wall, and a wedge deflection tool. The power unit is to provide a rotary power to the drill bit. The rigid bending unit is set between the drill bit and the power unit, to bend on a basis of an initial curvature under an external force. The bendable outer wall is set on an outer side of the power unit and the rigid bending unit. The wedge deflection tool is set at one end of the bendable outer wall near the drill bit, to receive a reaction force and bend the rigid bending unit. By a coordination between the wedge deflection tool and the power unit, a drilling direction of the drill bit connected to the rigid bending unit can be adjusted.

公开(公告)号：US12129620B1

公开(公告)日：2024-10-29

申请号：US18600416

申请日：2024-03-08

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

发明人： Yifan Zeng ,  Weihong Yang ,  Qiang Wu ,  Kai Pang ,  Xinjiang Wei ,  Xue Liu ,  Xuan Xiao ,  Aoshuang Mei ,  Shihao Meng ,  Chao Yu

IPC分类号： E21B33/13 ,  E02D3/12

CPC分类号： E02D3/12 ,  E02D2250/003 ,  E21B33/13

摘要： Disclosed is a method for repairing an aquifer in a coal mine area by grouting, including: drilling a survey hole in a ground area corresponding to a water inflow position from ground surface to a caving zone in a goaf; determining a target layer for grouting in the survey hole based on drilling data collected from the survey hole while drilling; changing the survey hole to a grouting hole; measuring a first water level from the grouting hole; grouting through the grouting hole; changing the grouting hole to an observation hole; measuring a second water level from the observation hole; and determining a water retention level based on the first water level and the second water level.

公开(公告)号：US11879327B2

公开(公告)日：2024-01-23

申请号：US17465015

申请日：2021-09-02

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

发明人： Qiang Wu ,  Chunsheng Liu ,  Yifan Zeng ,  Liu Liu ,  Fengjuan Tao ,  Gang Hu

IPC分类号： E21B47/12 ,  E21B47/04 ,  E21F17/18

CPC分类号： E21B47/12 ,  E21B47/04 ,  E21F17/18

摘要： Disclosed is a system and a method of transient electromagnetic advanced detection. The system includes a detection host, an electromagnetic signal transmitter, a probe, and a communication device. The system and method of transient electromagnetic advance detection disclosed by examples of the present disclosure can realize an early-warning through a transient electromagnetic advance detection in a borehole while drilling the borehole in a tunnel or a roadway.