基于岩体时间效应的深部变间距骑跨采巷道稳定性模拟  

Numerical Simulation of Deep Varied Interval Riding Mining Roadway Stability Based on Time-effect of Rock

作　　者：张培森[1,2] 林东才[1,2] 杨健[1,2] 王明辉[1,2] 

机构地区：[1]山东科技大学资源与环境工程学院,山东青岛266590 [2]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266590

出　　处：《山东科技大学学报（自然科学版）》2012年第6期10-14,41,共6页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51109124);教育部博士点新教师基金项目(20113718120009);中国博士后基金项目(20090461257);山东科技大学科研创新团队支持计划项目(2010KYTD106)

摘　　要：针对深部变间距骑跨采中工作面与底板巷道的不同空间位置关系,采用FLAC3D软件对考虑岩体时间效应时巷道垂向压力的影响范围、位移变化形态及塑性破坏程度进行了分析。研究结果表明,层间距对巷道顶底板及两帮相对移近量影响明显,且层间距对巷道两帮相对移近量的影响更大,同时层间距越大受动压的影响越弱,围岩收敛变形越小、底鼓量越小;围岩位移变化受岩体时间效应的影响程度随着煤层间距的增加而弱化;不同煤间距条件下,不同时间区间,其岩体的时间效应影响程度也存在差异。Aiming at deep varied interval riding mining, as well as different position relationships between working face and floor roadway,the FI.AC^3D software was applied to analyze the influence area of roadway vertical pressure, displacement variation and plastic damage degree considering time-effect of rock body. The results indicate that there is a significant effect from coal seam interval on the relative deformation amount of roof and floor and both sides of roadway,and even more on the latter. With the increase of coal seam interval,the effect of dynamic pressure on road- way is weaker,convergence deformation of surrounding rock and floor heave are both smaller,and the effect of time- effect on displacement variation of surrounding rock is weaker; the performance of rock time-effect is different under different coal seam intervals and different time ones.

关 键 词：变间距 骑跨采巷道 时间效应 数值模拟 

分 类 号：U455[建筑科学—桥梁与隧道工程]