Title:
DESIGN METHOD FOR MINING UPPER PROTECTIVE SEAM CLOSE TO TOTAL ROCK FOR USE IN COAL-BED MINING
Document Type and Number:
WIPO Patent Application WO/2017/185723
Kind Code:
A1
Abstract:
A design method for mining an upper protective seam close to total rock for use in coal-bed mining. On the basis of geological condition information of a protective seam mining project and physical mechanical parameters of a coal-rock mass, a numerical analysis method is used to determine an expansion deformation rate φ of the protective seam, a destruction depth K of a plastic zone at the floor of the protective seam, a coal-bed gas pressure P, a protective seam mining thickness M which satisfies provisions outlined in Provisions on Prevention and Control of Coal and Gas Outbursts, and a spacing H between the protective seam and a protected seam; and according to a percentage of the mining thickness of a rock layer in the upper protective seam close to total rock, a mining process for the protective seam close to total rock is determined from among: a traditional fully mechanized mining process, a traditional fully mechanized mining process assisted by single-row hole blasting and pre-splitting, and a traditional fully mechanized mining process assisted by double-row three-hole blasting. The present method can provide a theoretical basis for safe stoping of a low-permeability high gas coal seam when there is no conventional protective seam to be mined, which further enriches design methods for mining protective seams. The method is cost-effective, safe and efficient, and widely practicable.
Inventors:
ZHANG JIXIONG (CN)
ZHANG QIANG (CN)
SUN QIANG (CN)
MEI XIANCHENG (CN)
ZHANG QIANG (CN)
SUN QIANG (CN)
MEI XIANCHENG (CN)
Application Number:
PCT/CN2016/106341
Publication Date:
November 02, 2017
Filing Date:
November 18, 2016
Export Citation:
Assignee:
UNIV CHINA MINING & TECH (CN)
International Classes:
E21B49/00
Foreign References:
| CN105927217A | 2016-09-07 | |||
| CN102797465A | 2012-11-28 |
Other References:
LU , SHOUQING ET AL.: "Numerical Simulation Research on the Hongling Coal Mine's Minimum Mining Thickness of Upper Protective Layer", JOURNAL OF CHINA COAL SOCIETY, vol. 37, no. supp. 1, 30 June 2012 (2012-06-30), pages 43 - 47, XP055434165
WANG, JIACHEN ET AL.: "Numerical Simulation Study on Protective Seam Mining Effect Influenced by Thickness of Upper Protective Layers", PROCEEDINGS OF THE 11 TH NATIONAL CONFERENCE ON ROCK MECHANICS AND ENGINEERING, 31 December 2010 (2010-12-31), pages 103 - 107
LU , MINGXING: "Pressure Relief Mechanism at Upper Protective Layer Mining in Liangzhuang Coal Mine and Numerical Simulation of Protection Scope", METAL MINE, 30 April 2015 (2015-04-30), pages 7 - 11
LI, SHUGANG ET AL.: "Numerical Simulation of Pressure Relief Effects of Protective Layer Mining in Different Distances", JOURNAL OF LIAONING TECHNICAL UNIVERSITY ( NATURAL SCIENCE), vol. 33, no. 3, 31 March 2014 (2014-03-31), pages 294 - 297
LU , KAI ET AL.: "Numerical Simulation Study on Protective Layer Mining", SCIENCE AND TECHNOLOGY INNOVATION HERALD, 31 December 2015 (2015-12-31), pages 36 - 37
ZHANG, QIANG ET AL.: "Design and Application of Solid, Dense Backfill Advanced Mining Technology with Two Pre-driving Entries", INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, vol. 25, no. 1, 7 February 2015 (2015-02-07), pages 127 - 132, XP055434174
WANG, JIACHEN ET AL.: "Numerical Simulation Study on Protective Seam Mining Effect Influenced by Thickness of Upper Protective Layers", PROCEEDINGS OF THE 11 TH NATIONAL CONFERENCE ON ROCK MECHANICS AND ENGINEERING, 31 December 2010 (2010-12-31), pages 103 - 107
LU , MINGXING: "Pressure Relief Mechanism at Upper Protective Layer Mining in Liangzhuang Coal Mine and Numerical Simulation of Protection Scope", METAL MINE, 30 April 2015 (2015-04-30), pages 7 - 11
LI, SHUGANG ET AL.: "Numerical Simulation of Pressure Relief Effects of Protective Layer Mining in Different Distances", JOURNAL OF LIAONING TECHNICAL UNIVERSITY ( NATURAL SCIENCE), vol. 33, no. 3, 31 March 2014 (2014-03-31), pages 294 - 297
LU , KAI ET AL.: "Numerical Simulation Study on Protective Layer Mining", SCIENCE AND TECHNOLOGY INNOVATION HERALD, 31 December 2015 (2015-12-31), pages 36 - 37
ZHANG, QIANG ET AL.: "Design and Application of Solid, Dense Backfill Advanced Mining Technology with Two Pre-driving Entries", INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, vol. 25, no. 1, 7 February 2015 (2015-02-07), pages 127 - 132, XP055434174
Attorney, Agent or Firm:
NANJING RUI HONG PATENT AND TRADEMARK OFFICE LLP (CN)
Download PDF: