Deformation mechanism and repairing technology for coal-rock uphill roadway under influence of dynamic pressure

中国安全科学学报 Pub Date : 2020-03-28 DOI:10.16265/J.CNKI.ISSN1003-3033.2020.03.011

G. Lin, Wang Jiachen, Kong Dezhong, Wu Guiyi, Ma Zhenqian

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引用次数: 2

Abstract

In order to solve difficulty of surrounding rock control under influence of dynamic pressureꎬ with uphill coal transportation roadway of a mine in Guizhou province as engineering backgroundꎬ main features of surrounding rock deformation of such kind of roadway were clarified through field investigation. Thenꎬ spatial and temporal distribution characteristics of plastic zoneꎬ stress field and displacement field were obtained by numerical simulation analysisꎬ and condition for shear ̄slip ̄fault occurrence of coal ̄rock interface was analyzed theoretically. Thenꎬ through analysis on action principle of overlap arch bearing structureꎬ it was found that failure mechanism of original " bolt + mesh + shotcrete + anchor cable" support was disappearance of main compression arch and effect limitation of subordinate compression arch. 中国安全科学学报 China Safety Science Journal 第30卷 2020年 Finallyꎬ repairing principle and a scheme were put forward with the core of collaborative control of " grouting after covering U ̄steel shed + asymmetric and inclined cross ̄layer locking clamp cables" . The practice shows that serious asymmetric deformation of surrounding rock can be effectively controlled with the proposed scheme.

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动压影响下煤岩上坡巷道变形机理及修复技术

为解决动压影响下的围岩控制难题ꎬ以贵州某矿上坡运煤巷道为工程背景ꎬ，通过现场调查，明确了该类巷道围岩变形的主要特征。然后通过数值模拟分析得到了塑性区ꎬ时空分布特征ꎬ应力场和位移场ꎬ，并从理论上分析了煤岩界面剪切滑断发生的条件。然后ꎬ通过对重叠拱支承结构作用原理的分析ꎬ发现原来的“锚杆+网眼+喷射混凝土+锚索”支护的破坏机理是主压拱消失，次压拱作用受限。最后提出了以“覆盖钢棚后灌浆+不对称倾斜跨层锁紧夹索”协同控制为核心的修复原理和方案ꎬ。实践表明，该方案可有效控制严重的围岩不对称变形。

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来源期刊

中国安全科学学报

CiteScore

1.30

自引率

0.00%

发文量

8733

期刊介绍： China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad. China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454. Honors: Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level National Chinese core journals China Science and technology core journals CSCD journals The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included