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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:
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Assignee:
CHINA UNIVERSITY OF MINING AND TECHNOLOGY (No. 1, Daxue Road Tongsha, Xuzhou Jiangsu 0, 220000, CN)
International Classes:
E21F15/00
Foreign References:
CN102155226A2011-08-17
CN101126316A2008-02-20
Other References:
AN, BAIFU: "Controlling Mechanism of Surround Rock Stability in Recovering Room Mining Standing Pillars by Consolidated Solid Backfilling Mining", CHINA DOCTORAL DISSERTATIONS FULL-TEXT DATABASE (ENGINEERING SCIENCE AND TECHNOLOGY I), 15 February 2017 (2017-02-15), pages 68 - 92; 114-117
LI, LIANG: "Basic Study on Flexible Strip Filling in Water Preserving Mining of Shallow Seam", CHINESE MASTER'S THESES FULL-TEXT DATABASE (ENGINEERING SCIENCE AND TECHNOLOGY I, 15 February 2013 (2013-02-15), pages 50 - 66
FANG, KUN: "Research on Principal Technology of Recovering Room Coal Pillar with Combined Artificial Pillar and Solid Backfill Mining", CHINESE MASTER'S THESES FULL-TEXT DATABASE (ENGINEERING SCIENCE AND TECHNOLOGY I, 15 February 2017 (2017-02-15), pages 15 - 17
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (12th FL.-B, No. 179 Zhongshan Road Gulo, Nanjing Jiangsu 5, 210005, CN)
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