Filling bag and sealing method for drilled hole for detection in three zones of overburden

US11459849B1 · kind B1 · utility

Assignees

• China University of Mining and Technology-Beijing · CN
• Shaanxi Coal Caojiatan Mining Co., Ltd. · CN

Inventors

• Yifan Zeng · Beijing, CN
• Qiang Wu · 流花街道, CN
• Zhaolai Hua · Beijing, CN
• Rui Wang · Redmond, US
• Zhenzhong Pang · Beijing, CN
• Lu Wang · Beijing, CN
• Yang Lv · Suzhou, CN
• Xin Du · Schaumburg, US
• Kai Pang · Beijing, CN
• Aoshuang Mei · Beijing, CN

Key dates

• Filing date: Apr 26, 2022
• Grant date: Oct 4, 2022
• Expiry date: Apr 26, 2042

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21F17/00
• WIPO field: Civil engineering
• WIPO sector: Other fields

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.