急倾斜软硬互层巷道变形破坏机制及支护技术研究

›› 2014, Vol. 35 ›› Issue (8): 2367-2374.

急倾斜软硬互层巷道变形破坏机制及支护技术研究

杨帆¹，陈卫忠^{1, 2}，郑朋强¹，伍国军¹，袁敬强¹，于建新¹

1.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071； 2.山东大学岩土与结构工程研究中心，济南 250061

收稿日期:2014-03-28 出版日期:2014-08-12 发布日期:2014-08-14
作者简介:杨帆，男，1988年生，硕士研究生，主要从事煤矿及地下工程支护技术和数值仿真方面的研究工作。
基金资助:
国家杰出青年基金资助（No. 51225902）；国家自然科学基金（No. 51379007，No. 41130742）；国家重点基础研究发展计划（973）资助（No. 2013CB036006）。

Research on mechanism of deformation and failure for steeply inclined roadways in soft-hard alternant strata and its support technology

YANG Fan¹, CHEN Wei-zhong^{1, 2}, ZHENG Peng-qiang¹, WU Guo-jun¹, YUAN Jing-qiang¹, YU Jian-xin¹

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China

Received:2014-03-28 Online:2014-08-12 Published:2014-08-14

摘要/Abstract

摘要： 针对急倾斜软硬互层巷道围岩大变形控制难题，采用现场试验、理论分析和数值仿真等多种手段，研究急倾斜巷道围岩变形破坏机制，研究结果表明：急倾斜软硬互层巷道的变形与破坏具有非对称性，偏压作用明显，呈现顶板下滑，底板臌起的相互错动变形特征，底臌严重且易片帮冒顶。巷道断面与岩层倾斜方向的钝角部位受侧向约束小，因而剪切滑移变形较大，是产生非对称变形破坏的关键部位；下帮围岩变形破坏较上帮更为严重。基于急倾斜巷道的变形破坏特点，提出在锚- 网-索耦合支护的基础上利用锚索、底角锚杆等对产生差异变形破坏的关键部位进行加强支护的方法，巷道大变形得到了有效控制。

关键词: 软硬互层, 急倾斜巷道, 变形破坏机制, 数值模拟

Abstract: Aimed at solving the large deformation control problems of surrounding rock masses of steeply inclined roadway in soft-hard alternate strata, field tests, theoretical analysis and numerical simulation and other research methods were applied to analyze the mechanism of deformation and damage for steeply inclined roadway surrounding rock masses under typical condition of alternate strata. The results show the asymmetric deformation characteristic of surrounding rock of steeply inclined roadway in soft-hard alternate strata, evident effect of unsymmetrical pressure, the mutual miss movement deformation features of “roof sliding and floor heave”, obvious floor heave and high possibility of wall caving and roof collapse. The deformation failure was significantly influenced by an obtuse angle region between roadway sections and incline directions of rock strata, which is less confined, ending up with more shear strain. Deformation and failure of lower wall rock mass aggravated compared to the upper wall rock mass. Based on the deformation and failure characteristics of steeply inclined roadway, according to the strategy of asymmetric coupling support, the key position of surrounding rock that may produce deformation discrepancy was reinforced by anchor cable and floor bolt after bolt-net- anchor coupling support and the large deformation of roadway was effectively controlled.

Key words: soft-hard alternate strata, steeply inclined roadway, deformation and damage mechanism, numerical simulation

中图分类号:

TU 457

杨帆，陈卫忠，郑朋强，伍国军，袁敬强，于建新,. 急倾斜软硬互层巷道变形破坏机制及支护技术研究[J]. , 2014, 35(8): 2367-2374.

YANG Fan , CHEN Wei-zhong , ZHENG Peng-qiang , WU Guo-jun , YUAN Jing-qiang , YU Jian-xin,. Research on mechanism of deformation and failure for steeply inclined roadways in soft-hard alternant strata and its support technology[J]. , 2014, 35(8): 2367-2374.

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