厚硬石灰岩顶板工作面顺槽支护优化研究  

Study on Optimization of Crossheading Support in Working Face with Thick Hard Limestone Roof

作　　者：张灵杰 康天合[1] 刘云飞[1] 张更鑫 汪家畅 ZHANG Lingjie;KANG Tianhe;LIU Yunfei;ZHANG Gengxin;WANG Jiachang(Key Laboratory of In-situ Modified Mining,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学原位改性采矿教育部重点实验室,太原030024

出　　处：《煤炭技术》2024年第1期30-33,共4页Coal Technology

基　　金：国家自然科学基金项目(42072203)。

摘　　要：为解决厚硬石灰岩顶板回采巷道原支护方案存在支护不当、成本过高且受采动影响时两帮围岩变形量大的问题,以山西灵石华苑煤业9103轨道顺槽为研究对象,通过现场监测并结合回采巷道煤与岩石的物理力学参数,采用工程类比法对原支护方案进行优化。运用FLAC3D数值模拟软件对优化前后巷道在掘巷期间及在受相邻工作面和本工作面采动影响后的支护效果进行对比分析,证明其优化方案的可行性。研究结果表明:优化方案在巷道掘巷完成后的顶板变形量较原方案增大2.6%,两帮变形量减小13.1%;优化支护方案在相邻工作面和本工作面采动应力作用下,顶板变形量较原方案均无明显增大,两帮移近量较原支护方案分别减小26.2%和32.8%。In order to solve the problems of improper support,high cost and large deformation of the surrounding rocks of the two gangs when affected by mining movement,the original support scheme was optimized by using on-site monitoring and physical and mechanical parameters of coal and rocks in the retrieved roadway,taking the 9103 track chute of Huayuan coal industry in Lingshi,Shanxi province as the research object.FLAC3D numerical simulation software was used to compare and analyze the support effect of the tunnel before and after optimization during the tunneling period and after being affected by the mining movement of the adjacent working face and this working face,to prove the feasibility of the optimized plan.The results of the study showed that:the optimized solution increased the roof deformation by 2.6%and reduced the deformation of both side wall in roadway by 13.1%compared with the original solution after the tunneling was completed;the optimized support solution did not increase the roof deformation significantly compared with the original solution under the action of mining stress in the adjacent working face and this working face,and the both side wall in roadway shifted closer by 26.2%and 32.8%respectively compared with the original support solution.

关 键 词：厚硬顶板 支护 数值模拟 采动应力 围岩变形量 

分 类 号：TD353[矿业工程—矿井建设]