专利检索 ap:("CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING" OR "Shaanxi Coal Caojiatan Mining Co., Ltd.") AND inv:"Zhenzhong Pang" 第 1 页

1.

发明授权
Filling bag and sealing method for drilled hole for detection in three zones of overburden 有权

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.