Bolt-grouting combined support technology in deep soft rock roadway

作     者：Chen Yanlong Meng Qingbin Xu Guang Wu Haoshuai Zhang Guimin 

作者机构：State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining & Technology Department of Mining Engineering & Metallurgical Engineering Western Australian School of Mines Curtin University School of Mechanics and Civil Engineering China University of Mining & Technology 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2016年第26卷第5期

页      面：777-785页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：financial assistance provided by the National Natural Science Foundation of China (No. 51404262) the Natural Science Foundation of Jiangsu Province of China (No. BK20140213) the Basal Research Fund of China Central College (No. 2015QNA60) 

主　　题：Deep soft rock roadway Bolt-grouting support Numerical simulation Similar material simulation High stress 

摘      要：Analyzing the mineral composition, mechanical properties and ground stress testing in surrounding rock,the study investigated the failure mechanism of deep soft rock roadway with high stress. The boltgrouting combined support system was proposed to prevent such failures. By means of FLAC3D numerical simulation and similar material simulation, the feasibility of the support design and the effectiveness of support parameters were discussed. According to the monitoring the surface and deep displacement in surrounding rock as well as bolt axial load, this paper analyzed the deformation of surrounding rock and the stress condition of the support structure. The monitor results were used to optimize the proposed support scheme. The results of field monitors demonstrate that the bolt-grouting combined support technology could improve the surround rock strength and bearing capacity of support structure, which controlled the great deformation failure and rheological property effectively in deep soft rock roadway with high stress. As a result, the long term stability and safety are guaranteed.