Bolt-grouting combined support technology in deep soft rock roadway

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• 作者：Yanlong Chen^a ; ^{chenyanlong@cumt.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Qingbin Meng^a ; Guang Xu^b ; Haoshuai Wu^c ; Guimin Zhang^c
• 关键词：Deep soft rock roadway ; Bolt-grouting support ; Numerical simulation ; Similar material simulation ; High stress
• 刊名：International Journal of Mining Science and Technology
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：26
• 期：5
• 页码：777-785
• 全文大小：2853 K

文摘

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 bolt-grouting 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.