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 (CN)
SUN QIANG (CN)
ZHOU NAN (CN)
ZHANG QIANG (CN)
JIANG SHUYIN (CN)
SUN QIANG (CN)
ZHOU NAN (CN)
ZHANG QIANG (CN)
JIANG SHUYIN (CN)
Application Number:
PCT/CN2017/112100
Publication Date:
May 09, 2019
Filing Date:
November 21, 2017
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21F15/00
Foreign References:
| CN102155226A | 2011-08-17 | |||
| CN101126316A | 2008-02-20 |
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
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 (CN)
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