The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 2022
Filed:
Apr. 26, 2022
China University of Mining and Technology, Beijing, Beijing, CN;
Shaanxi Coal Caojiatan Mining Co., Ltd., Yulin, CN;
Yifan Zeng, Beijing, CN;
Qiang Wu, Beijing, CN;
Zhaolai Hua, Beijing, CN;
Rui Wang, Beijing, CN;
Zhenzhong Pang, Beijing, CN;
Lu Wang, Beijing, CN;
Yang Lv, Beijing, CN;
Xin Du, Beijing, CN;
Kai Pang, Beijing, CN;
Aoshuang Mei, Beijing, CN;
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING, Beijing, CN;
Shaanxi Coal Caojiatan Mining Co., Ltd., Yulin, CN;
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.