高瓦斯煤层顶板自动进巷围岩变形及瓦斯控制研究

IF 1.9 4区工程技术 Q4 ENERGY & FUELS

Energy Exploration & Exploitation Pub Date : 2023-06-15 DOI:10.1177/01445987231181722

Hai-Feng Gao, Yubing Gao, Jingchen Qi, Q. Fu, Xingyu Zhang

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引用次数: 0

摘要

高瓦斯煤层开采面临的主要问题是围岩严重变形和瓦斯过剩。分析了高瓦斯煤层围岩变形特征及力学模型，提出了高瓦斯煤岩变形控制及瓦斯防治技术。在此基础上，提出了沙曲煤矿顶板切割自动形成巷道的围岩控制技术和恒阻大变形锚索支护控制技术。同时，对传统采矿方法和EAFRC采矿方法下工作面围岩应力及瓦斯运移规律进行了对比分析。通过现场工程试验、围岩变形及瓦斯浓度监测分析，顶板路堑巷道平均围岩变形310 mm，采空留巷瓦斯浓度为0.31%。通过本文的研究，实现了工作面的围岩稳定性和瓦斯控制，EAFRC的无柱开采确保了高瓦斯工作面的安全开采，为类似矿山在无柱开采中的开采提供了参考。同时，建立了EAFRC无柱采矿技术体系，促进了无柱采矿的发展和应用。

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

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.

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来源期刊

Energy Exploration & Exploitation 工程技术-能源与燃料

CiteScore

5.40

自引率

3.70%

发文量

审稿时长

3.9 months

期刊介绍： Energy Exploration & Exploitation is a peer-reviewed, open access journal that provides up-to-date, informative reviews and original articles on important issues in the exploration, exploitation, use and economics of the world’s energy resources.