深部厚顶煤巷道围岩变形破坏机制模型试验研究

›› 2013, Vol. 34 ›› Issue (10): 2847-2856.

深部厚顶煤巷道围岩变形破坏机制模型试验研究

李为腾^{1, 2}，李术才¹，王琦^{1, 2, 3}，阮国强³，左金忠³，刘文江³，王德超¹，王洪涛¹

1.山东大学岩土与结构工程研究中心，济南 250061； 2.山东省矿山灾害预防控制国家重点实验室培育基地，山东青岛 266590；3.兖矿集团有限公司，山东邹城 273500

收稿日期:2012-09-21 出版日期:2013-10-09 发布日期:2013-10-18
通讯作者: 王琦，男，1983年生，博士，讲师，主要从事地下工程支护及模型试验方面的研究工作。E-mail: wangqi@sdu.edu.cn E-mail:lwteng2007@163.com
作者简介:李为腾，男，1987年生，博士研究生，主要从事深部软岩支护理论与技术方面的研究工作
基金资助:
国家自然科学基金（No. 51304125）；中国博士后科学基金面上资助（No. 2013M540548）；矿山灾害预防控制国家重点实验室培育基地开放基金（No. MDPC2012KF11）。

Model test study of surrounding rock deformation and failure mechanism of deep roadway with thick top coal

LI Wei-teng^{1, 2}, LI Shu-cai¹, WANG Qi^{1, 2, 3}, RUAN Guo-qiang³, ZUO Jin-zhong³, LIU Wen-jiang³, WANG De-chao¹, WANG Hong-tao¹

1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 2. State Key Laboratory of Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; 3. Yankuang Group Company Limited, Zoucheng, Shandong 273500, China

Received:2012-09-21 Online:2013-10-09 Published:2013-10-18

摘要/Abstract

摘要： 为研究深部厚顶煤巷道围岩变形破坏特性及其机制，以赵楼煤矿千米深井厚顶煤巷道为工程背景，开展了大比尺地质力学模型试验，对让压型锚索箱梁支护系统作用下的巷道围岩位移、应力演化规律进行的研究表明：巷道顶底板围岩竖向应力释放较两帮剧烈，水平应力释放反之，巷道顶板中部围岩是顶板竖向应力释放的主要部位。通过与现场试验结果对比验证，总结出深部厚顶煤巷道围岩变形破坏的3个主要特征：顶板变形破坏较两帮和底板严重、顶板围岩变形破坏主要发生在煤岩交界面以下的煤体中、巷中是顶板变形破坏的关键部位，并进一步分析了相应机制：顶板煤岩松软破碎、自承能力差、顶板及其巷中竖向应力释放相对更为剧烈、矩形巷道顶板受力状态差等因素，导致顶煤所受径向应力低，碎胀变形剧烈，且弯曲变形、离层严重，顶板受力结构恶化，最终导致顶板控制困难。

关键词: 厚顶煤巷道, 让压型锚索箱梁, 模型试验, 变形破坏, 机制, 关键部位

Abstract: In order to research the surrounding rock deformation and failure mechanism of deep thick top coal roadway, taking Zhaolou coal mine in Juye mining area as engineering background, a large scale model test is carried out, the stress and displacement evolution laws of surrounding rock supported by pressure relief anchor cable box beam supporting programs are researched. And the results show: the vertical stress release is more intense in roof and floor of the roadway than that in the side wall, while the horizontal stress is the opposite; central of roadway roof is the main position of vertical stress release. By being compared with field test results, three main deformation and failure characters of the surrounding rock of deep thick top coal roadway are summarized: the deformation and failure of roof is more serious than that of side wall and floor; deformation and failure of roadway roof occurrs mainly in the coal below coal-rock interface; central of roadway roof is the key position of the deformation and failure. The corresponding mechanism is analyzed: the factors such as soft and broken features of roof coal, its poor self-supporting ability, vertical stress releasing more severe in roof and its central, poor force state of rectangle roadway, cause low radial stress of surrounding rock in roof, serve bulking deformation, bending deformation and roof separation, and worsen the roof force structure, finally, they lead to controlling trouble of roadway roof.

Key words: roadway with thick top coal, pressure relief anchor cable box beam, model test, deformation and failure, mechanism, key position

中图分类号:

TD 353

李为腾，李术才，王琦，阮国强，左金忠，. 深部厚顶煤巷道围岩变形破坏机制模型试验研究[J]. , 2013, 34(10): 2847-2856.

LI Wei-teng , LI Shu-cai , WANG Qi , RUAN Guo-qiang , ZUO Jin-zhong , . Model test study of surrounding rock deformation and failure mechanism of deep roadway with thick top coal[J]. , 2013, 34(10): 2847-2856.

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