Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques

Research on underground coal mines has primarily focused on the stability of roadways. Mining activities lead to significant damage to the surrounding rocks and also degrade the support to the roadways. Considering the 21309 roadway of the Huojitu coal mine as a case study, this work comprehensively...

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Autores principales:	Xiaojie Yang, Gang Yang, Ruifeng Huang, Yajun Wang, Jianning Liu, Jun Zhang, Shilin Hou
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	longwall mining roadway stability mining rock mechanics numerical modeling Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/3c7cbde61ef842d194b1d7b53337eeb9
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spelling	oai:doaj.org-article:3c7cbde61ef842d194b1d7b53337eeb92021-11-11T14:57:01ZComprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques10.3390/app112197952076-3417https://doaj.org/article/3c7cbde61ef842d194b1d7b53337eeb92021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/9795https://doaj.org/toc/2076-3417Research on underground coal mines has primarily focused on the stability of roadways. Mining activities lead to significant damage to the surrounding rocks and also degrade the support to the roadways. Considering the 21309 roadway of the Huojitu coal mine as a case study, this work comprehensively analyzed the characteristics of the surrounding rock using three methods: theoretical calculations, FLAC<sup>3D</sup> numerical modeling, and field observations. The results indicate that, under the influence of secondary mining, the failure range and stress concentration degree of the surrounding rock are considerably higher than those under the influence of primary mining. In this case, the maximum damage range in the surrounding rock can reach 1.8 m, the maximum principal stress can reach 19.82 MPa, and the ratio of the maximum principal stress to the minimum principal stress can reach 1.95. According to the results, the previous support design for roadways was optimized and applied in the field. Field monitoring revealed that the roadway deformation was effectively controlled, and the optimized support design was safe and reliable. This study is expected to serve as a reference for support designs or optimization under similar geological conditions.Xiaojie YangGang YangRuifeng HuangYajun WangJianning LiuJun ZhangShilin HouMDPI AGarticlelongwall miningroadway stabilitymining rock mechanicsnumerical modelingTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 9795, p 9795 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	longwall mining roadway stability mining rock mechanics numerical modeling Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	longwall mining roadway stability mining rock mechanics numerical modeling Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Xiaojie Yang Gang Yang Ruifeng Huang Yajun Wang Jianning Liu Jun Zhang Shilin Hou Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques
description	Research on underground coal mines has primarily focused on the stability of roadways. Mining activities lead to significant damage to the surrounding rocks and also degrade the support to the roadways. Considering the 21309 roadway of the Huojitu coal mine as a case study, this work comprehensively analyzed the characteristics of the surrounding rock using three methods: theoretical calculations, FLAC<sup>3D</sup> numerical modeling, and field observations. The results indicate that, under the influence of secondary mining, the failure range and stress concentration degree of the surrounding rock are considerably higher than those under the influence of primary mining. In this case, the maximum damage range in the surrounding rock can reach 1.8 m, the maximum principal stress can reach 19.82 MPa, and the ratio of the maximum principal stress to the minimum principal stress can reach 1.95. According to the results, the previous support design for roadways was optimized and applied in the field. Field monitoring revealed that the roadway deformation was effectively controlled, and the optimized support design was safe and reliable. This study is expected to serve as a reference for support designs or optimization under similar geological conditions.
format	article
author	Xiaojie Yang Gang Yang Ruifeng Huang Yajun Wang Jianning Liu Jun Zhang Shilin Hou
author_facet	Xiaojie Yang Gang Yang Ruifeng Huang Yajun Wang Jianning Liu Jun Zhang Shilin Hou
author_sort	Xiaojie Yang
title	Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques
title_short	Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques
title_full	Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques
title_fullStr	Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques
title_full_unstemmed	Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques
title_sort	comprehensive study on surrounding rock failure characteristics of longwall roadway and control techniques
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3c7cbde61ef842d194b1d7b53337eeb9
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Comprehensive Study on Surrounding Rock Failure Characteristics of Longwall Roadway and Control Techniques

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