动压影响半煤岩上山变形机制及修复技术

doi:10.16265/j.cnki.issn1003-3033.2020.03.011

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (3): 67-73.doi: 10.16265/j.cnki.issn1003-3033.2020.03.011

动压影响半煤岩上山变形机制及修复技术

高林^1,2,3 讲师, 王家臣² 教授, 孔德中¹ 讲师, 吴桂义¹ 副教授, 马振乾¹ 讲师

1.贵州大学矿业学院,贵州贵阳 550025;
2.中国矿业大学(北京) 能源与矿业学院,北京 100083;
3.贵州大学喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵州贵阳 550025

收稿日期:2019-12-06 修回日期:2020-02-04 出版日期:2020-03-28 发布日期:2021-01-26
作者简介:高林(1986—),男,湖北宜昌人,博士,讲师,主要从事矿山岩体力学与巷道围岩控制方面的研究。E-mail:lgao@gzu.edu.cn。
基金资助:
国家重点研发计划项目(2017YFC0603002);贵州省科学技术基金资助(黔科合基础[2020]1Y216);贵州省本科高校一流专业(采矿工程)建设项目(SJZY2017006);贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]114号)。

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

GAO Lin^1,2,3, WANG Jiachen², KONG Dezhong¹, WU Guiyi¹, MA Zhenqian¹

1. Mining College, Guizhou University, Guiyang Guizhou 550025, China;
2. Faculty of Energy and Mining, China University of Mining and Technology (Beijing), Beijing 100083, China;
3. National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guizhou University, Guiyang Guizhou 550025, China

Received:2019-12-06 Revised:2020-02-04 Online:2020-03-28 Published:2021-01-26

摘要/Abstract

摘要： 为解决动压影响下巷道围岩控制难题,以贵州某矿半煤岩运煤上山为工程背景,基于现场调研,明确此类巷道围岩变形的主要特征;通过数值模拟分析,得出近距离煤层群重复采动下半煤岩上山围岩塑性区、应力场与位移场的时空分布特征;通过理论分析得出煤岩分界面剪切滑移错动的发生条件;基于“叠加拱承载结构”作用原理,分析得出原“锚网喷+锚索”支护的失效机制为主压缩拱消失和次压缩拱作用受限;针对性地提出巷道修复原则及以“套棚灌浆+非对称穿层斜拉锁棚锚索”协同控制为核心的修复方案。实践表明:所提修复方案可以有效控制巷道围岩非对称大变形。

关键词: 重复采动, 半煤岩巷道, 煤岩分界面, 套棚灌浆, 锁棚锚索

Abstract: In order to solve difficulty of surrounding rock control under influence of dynamic pressure, with uphill coal transportation roadway of a mine in Guizhou province as engineering background, main features of surrounding rock deformation of such kind of roadway were clarified through field investigation. Then, spatial and temporal distribution characteristics of plastic zone, stress field and displacement field were obtained by numerical simulation analysis, and condition for shear-slip-fault occurrence of coal-rock interface was analyzed theoretically. Then, through analysis on action principle of overlap arch bearing structure, 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. Finally, 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.

Key words: repeated mining, coal-rock roadway, coal-rock interface, grouting after covering U-steel shed, cable for locking shed

中图分类号:

X936

高林, 王家臣, 孔德中, 吴桂义, 马振乾. 动压影响半煤岩上山变形机制及修复技术[J]. 中国安全科学学报, 2020, 30(3): 67-73.

GAO Lin, WANG Jiachen, KONG Dezhong, WU Guiyi, MA Zhenqian. Deformation mechanism and repairing technology for coal-rock uphill roadway under influence of dynamic pressure[J]. China Safety Science Journal, 2020, 30(3): 67-73.

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动压影响半煤岩上山变形机制及修复技术

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

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