Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR FILLING COAL MINING TO RECOVER RESIDUAL COAL PILLAR AND CONTROLLING STABILITY OF WATERPROOF KEY LAYER
Document Type and Number:
WIPO Patent Application WO/2019/085052
Kind Code:
A1
Abstract:
Disclosed is a method for filling coal mining to recover a residual coal pillar and controlling stability of a waterproof key layer. A cement-filling pumping device is arranged in a tunnel formed by a mined coal chamber; goafs at two sides are filled with an aeolian sand-based cement-filling material, and the residual coal pillar is stoped after a body to be filled reaches a certain bearing capacity; and after the coal pillar is stoped, secondary filling of goafs by aeolian sand is carried out using a high-speed power throwing machine and a bulldozer. By means of the method, an earth surface natural aeolian sand material can be used to the maximum extent, an overlying waterproof key layer is effectively controlled, and a new technical method is provided for stoping the residual coal pillar in the ecological weak mine area in western China and protecting the ecological environment.

Inventors:
ZHANG, Jixiong (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
SUN, Qiang (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
ZHOU, Nan (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
ZHANG, Qiang (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
JIANG, Shuyin (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
Application Number:
CN2017/112100
Publication Date:
May 09, 2019
Filing Date:
November 21, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
International Classes:
E21F15/00
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (12th FL.-B, No. 179 Zhongshan Road Gulo, Nanjing Jiangsu 5, 210005, CN)
Download PDF: