芦岭煤矿Ⅲ1024底板巷支护与围岩类型稳定性分析  

Stability analysis of Ⅲ 1024 floor roadway support and surrounding rock type in Luling coal mine

作　　者：张勇[1] ZHANG Yong(Luling Coal Mine Office,Huaibei Mining Group,Suzhou 234113,China)

机构地区：[1]安徽省淮北矿业集团股份公司芦岭煤矿办公室,安徽宿州234113

出　　处：《四川建材》2022年第6期94-95,共2页Sichuan Building Materials

摘　　要：以芦岭煤矿Ⅲ1024底板巷工程地质条件为背景,通过FLAC^(3D) 5.0有限元差分软件,分析该底板巷在不同围岩类型条件下巷道开挖后,在相同支护方案下围岩破坏以及巷道变形情况。研究表明:由于在巷道开挖过程中两帮应力集中逐渐向下底板下移,导致底板应力过大。因此泥岩巷道底臌尤为严重。随着岩性的变化,巷道两帮位移较为显著,顶底板位移差别不大,两帮应力区逐渐降低,巷道水平应力回升至原岩应力更加困难。通过现场矿压监测数据来分析实际巷道围岩变形情况,并提出改善方案,从而保障巷道围岩稳定性,达到工程实际要求。Taking the engineering geological conditions ofⅲ1024 floor roadway in Luling Coal Mine as the background,flAC^(3D) 5.0 finite element software was used to analyze the surrounding rock failure and roadway deformation of the floor roadway under the same support scheme after excavation under different surrounding rock types.The results show that the floor stress is too large due to the stress concentration of the two sides in the process of roadway excavation.Therefore,mudstone drift floor heave is particularly serious.With the change of lithology,the displacement of both sides of roadway is significant,while there is little difference between roof and floor displacement.The stress zone of both sides decreases gradually,and it is more difficult for the horizontal stress of roadway to recover to the original rock stress.The actual roadway surrounding rock deformation is analyzed by in-situ monitoring data of mine pressure,and the improvement scheme is put forward,so as to ensure the stability of roadway surrounding rock and meet the actual engineering requirements.

关 键 词：FLAC 不同围岩 支护方案 三心拱 

分 类 号：TD263[矿业工程—矿井建设]