Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine

In order to solve the difficult problem of coal wall spalling of soft seam in deep mining, the occurrence mechanism of coal wall spalling in deep mining is studied based on the limit equilibrium theory of D-P criterion. Through the analysis of the formula of plastic zone, it can be concluded that th...

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Main Authors: Shaobo Li, Lei Wang, Chuanqi Zhu, Qihan Ren
Format: Article
Language:English
Published: Wiley 2021-01-01
Series:Advances in Materials Science and Engineering
Online Access:http://dx.doi.org/10.1155/2021/2833210
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author Shaobo Li
Lei Wang
Chuanqi Zhu
Qihan Ren
author_facet Shaobo Li
Lei Wang
Chuanqi Zhu
Qihan Ren
author_sort Shaobo Li
collection DOAJ
description In order to solve the difficult problem of coal wall spalling of soft seam in deep mining, the occurrence mechanism of coal wall spalling in deep mining is studied based on the limit equilibrium theory of D-P criterion. Through the analysis of the formula of plastic zone, it can be concluded that the coal wall spalling of soft coal seam is related to mining depth, mining height, stress concentration factor, internal friction angle of coal, cohesion, and the compressive strength of coal body. Also, the change of uniaxial compressive strength of soft coal with different moisture content is studied through laboratory experiments. The experimental results show that the uniaxial compressive strength of soft coal reaches the maximum value when the moisture content is about 3.3%. The comprehensive research shows that the cohesion and strength of coal mass can be improved by increasing the working resistance of support, water injection in advanced deep-hole coal seam of two roadways, and pre-grouting in shallow hole of coal wall. The control measures can effectively control the coal wall spalling of soft coal seam. The research results have important guiding significance for safe and efficient mining of soft coal seam.
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institution Kabale University
issn 1687-8434
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language English
publishDate 2021-01-01
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series Advances in Materials Science and Engineering
spelling doaj-art-05f3d5d37575471db4be3a04f5c58c842025-02-03T07:23:29ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/28332102833210Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal MineShaobo Li0Lei Wang1Chuanqi Zhu2Qihan Ren3State Key Laboratory of Mining Induced Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan Anhui 232001, ChinaState Key Laboratory of Mining Induced Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan Anhui 232001, ChinaState Key Laboratory of Mining Induced Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan Anhui 232001, ChinaCCTEG Chongqing Research Institute, Chongqing, ChinaIn order to solve the difficult problem of coal wall spalling of soft seam in deep mining, the occurrence mechanism of coal wall spalling in deep mining is studied based on the limit equilibrium theory of D-P criterion. Through the analysis of the formula of plastic zone, it can be concluded that the coal wall spalling of soft coal seam is related to mining depth, mining height, stress concentration factor, internal friction angle of coal, cohesion, and the compressive strength of coal body. Also, the change of uniaxial compressive strength of soft coal with different moisture content is studied through laboratory experiments. The experimental results show that the uniaxial compressive strength of soft coal reaches the maximum value when the moisture content is about 3.3%. The comprehensive research shows that the cohesion and strength of coal mass can be improved by increasing the working resistance of support, water injection in advanced deep-hole coal seam of two roadways, and pre-grouting in shallow hole of coal wall. The control measures can effectively control the coal wall spalling of soft coal seam. The research results have important guiding significance for safe and efficient mining of soft coal seam.http://dx.doi.org/10.1155/2021/2833210
spellingShingle Shaobo Li
Lei Wang
Chuanqi Zhu
Qihan Ren
Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
Advances in Materials Science and Engineering
title Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
title_full Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
title_fullStr Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
title_full_unstemmed Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
title_short Research on Mechanism and Control Technology of Rib Spalling in Soft Coal Seam of Deep Coal Mine
title_sort research on mechanism and control technology of rib spalling in soft coal seam of deep coal mine
url http://dx.doi.org/10.1155/2021/2833210
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AT leiwang researchonmechanismandcontroltechnologyofribspallinginsoftcoalseamofdeepcoalmine
AT chuanqizhu researchonmechanismandcontroltechnologyofribspallinginsoftcoalseamofdeepcoalmine
AT qihanren researchonmechanismandcontroltechnologyofribspallinginsoftcoalseamofdeepcoalmine