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：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：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：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.