Study on surrounding rock deformation and gas control of entry automatically formed by roof cutting in high-gas coal seam-Reference-Cited by-同舟云学术

Study on surrounding rock deformation and gas control of entry automatically formed by roof cutting in high-gas coal seam

Published:2023-06-15 Issue:5 Volume:41 Page:1559-1575
ISSN:0144-5987
Container-title:Energy Exploration & Exploitation
language:en
Short-container-title:Energy Exploration & Exploitation

Author:

Gao Hainan¹²^ORCID,Gao Yubing¹²,Qi Jingchen¹²,Fu Qiang¹²,Zhang Xingyu¹²³

Affiliation:

1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing, China

2. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing, China

3. School of Engineering, Westlake University, Hangzhou, China

Abstract

Severe deformation of surrounding rock and excess-gas are the main problems faced in mining of high-gas coal seam. This paper analyzes the deformation characteristics and mechanical model of surrounding rock in high-gas coal seam, and proposes the control technology of surrounding rock deformation and gas prevention and control. Based on this, the entry automatically formed by roof cutting (EAFRC) surrounding rock control technology and constant resistance large deformation anchor cable (CRLDA) support control technology in Shaqu coal mine are put forward. At the same time, the surrounding rock stress and gas migration law of the working face under traditional mining method and EAFRC mining were compared and analyzed. Through the field engineering test, the monitoring and analysis of surrounding rock deformation and gas concentration, the average surrounding rock deformation of roof cutting roadway is 310 mm, and the gas concentration of retained roadway by roof cutting is 0.31%. Through the research in this paper, the surrounding rock stability and gas control of the working face have been realized, and the non-pillar mining of EAFRC has ensured the safe mining of high gas working faces, which provides a reference for the mining of similar mines in non-pillar mining. At the same time, the technical system of EAFRC in non-pillar mining was established, which promoted the development and application of non-pillar mining.

Funder

Fundamental Research Funds for the Central Universities

Young Elite Scientists Sponsorship Program by CAST

National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Energy Engineering and Power Technology,Fuel Technology,Nuclear Energy and Engineering,Renewable Energy, Sustainability and the Environment

Link

http://journals.sagepub.com/doi/pdf/10.1177/01445987231181722

Reference24 articles.

1. Three-dimensional analysis of coal barrier pillars in tailgate area adjacent to the fully mechanized top caving mining face

2. Study on Bidirectional Blasting Technology for Composite Sandstone Roof in Gob-Side Entry-Retaining Mining Method

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