近距离煤层动压巷道补强支护研究  

Study on reinforcement support for close coal seam dynamic pressure roadway

作　　者：李泳臻 魏永辉 郭坦 LI Yongzhen;WEI Yonghui;GUO Tan(School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Technical Center of Xishan Coal and Electricity(Group)Co.,Ltd.,Taiyuan 030000,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]西山煤电(集团)有限责任公司技术中心,山西太原030000

出　　处：《煤矿安全》2023年第12期123-133,共11页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(52274148)。

摘　　要：为了解决马兰矿近距离煤层上组煤采动影响下的下组煤巷道破坏严重、难于支护的问题,通过现场调研、数值模拟及理论分析,对巷道掘进后及上组煤回采期间的巷道围岩应力环境进行了分析;并基于此分析,提出原方案+管索组合结构的补强支护方案,对比了原支护方案及补强支护方案的塑性区发育和围岩变形情况。结果表明:补强支护方案下的巷道在掘进、采动影响下围岩的垂直、水平位移分别减少了12.76%、11.09%,17.06%、16.63%,塑性区发育的情况较原支护时也得到了明显改善;管索组合结构补强支护方案具有良好的支护效果,可以有效控制巷道围岩发育。In order to solve the severe damage and difficult support of lower group coal roadways under the influence of mining in upper group coal seams near Malan Mine,a field survey,numerical simulation,and theoretical analysis were conducted to analyze the stress environment of roadway surrounding rock during tunnel excavation and upper group coal mining.Based on this analysis,a strengthening support plan with combination structure of original plan and pipe cable was proposed,comparing the development of plastic zones and surrounding rock deformation between the original support plan and the strengthening support plan.The results showed that under the strengthening support plan,the vertical displacement and horizontal displacement of roadway surrounding rock reduced by 12.76%,11.09%,and 17.06%,16.63%respectively under tunnel excavation and mining influence,and the develop-ment of plastic zones was also significantly improved compared to the original support;the combination structure of pipe cable strengthening support plan has good supporting effect and can effectively control roadway surrounding rock development.

关 键 词：近距离煤层 采动影响 底板破坏 巷道支护 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]