Patents Assigned to Shaanxi Coal Caojiatan Mining Co., Ltd.
  • Filling bag and sealing method for drilled hole for detection in three zones of overburden
    Patent number: 11459849
    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.
    Type: Grant
    Filed: April 26, 2022
    Date of Patent: October 4, 2022
    Assignees: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING, Shaanxi Coal Caojiatan Mining Co., Ltd.
    Inventors: Yifan Zeng, Qiang Wu, Zhaolai Hua, Rui Wang, Zhenzhong Pang, Lu Wang, Yang Lv, Xin Du, Kai Pang, Aoshuang Mei