煤矿破碎围岩巷道支护机理和加固特性研究  

Research on the Support Mechanism and Reinforcement Characteristics of Coal Mine Broken Surrounding Rock Tunnels

作　　者：王浩 赵伟 Hao Wang;Wei Zhao(Zaozhuang Mining(Group)Fucun Coal Industry Co.,Ltd.,Jining,Shandong 277605)

机构地区：[1]枣庄矿业(集团)付村煤业有限公司,山东济宁277605

出　　处：《新疆钢铁》2024年第1期40-42,共3页Xinjiang Iron and Steel

摘　　要：开采深度的增加以及开采范围的扩大使得高应力条件软岩支护问题较为突出,且围岩力学特性差异和支护力学特性使得破碎围岩巷道极易发生变形失稳,具有较大的安全隐患。因此,研究基于传统巷道支护方式弊端,以平煤高突矿井进行案例工程分析,对其提出“被动支护+主动支护+主动加固”方案和底角加固设计思路,旨在提高巷道支护的稳定性。结果表明,研究通过高强度锚杆设计、注浆加固等措施对高应力破碎围岩巷道进行支护加固。结果表明,加固设计方案下,巷道断面的顶板和两帮的变形情况有所控制,且其在断面1和断面2上的最大锚杆轴力为80.29 KN和81.33 KN,极大提高支护结构的稳定性和承载能力。对高应力条件下的破碎围岩巷道进行锚注加固及支护加固等改进能有效满足作业条件需要,维护了巷道的稳定性。The increase in mining depth and the expansion of mining range have made the problem of high stress soft rock sup⁃port more prominent,and the differences in surrounding rock mechanical properties and support mechanical properties make the fractured surrounding rock roadway prone to deformation and instability,posing significant safety hazards.Therefore,based on the drawbacks of traditional roadway support methods,a case study of a flat coal high outburst mine was conducted to pro⁃pose a"passive support+active support+active reinforcement"scheme and a bottom corner reinforcement design concept,aim⁃ing to improve the stability of roadway support.The results indicate that the study provides support and reinforcement for high stress fractured surrounding rock tunnels through measures such as high-strength anchor rod design and grouting reinforce⁃ment.The results show that under the reinforcement design scheme,the deformation of the roof and two sides of the tunnel sec⁃tion is controlled,and the maximum anchor rod axial forces on section 1 and section 2 are 80.29 KN and 81.33 KN,greatly im⁃proving the stability and bearing capacity of the support structure.Improvements such as anchor injection reinforcement and support reinforcement can effectively meet the needs of working conditions and maintain the stability of fractured surrounding rock tunnels under high stress conditions.

关 键 词：煤矿 围岩巷道 支护机理 加固特性 

分 类 号：TD322[矿业工程—矿井建设]