摘要
大多数情况下,静态稳定性的研究就是围岩稳定性的研究。围岩环境、岩石力学性质对围岩稳定性有显著影响,弱结构面的存在和不确定性对露天煤矿群采空区稳定性的评价有很大影响。考虑露天煤矿群采空区的地压状况,对岩石横向运动成因进行三维数值模拟研究。模拟结果表明,采空区侧过载坍塌应力集中的影响范围不仅作用于煤层,而且形成了从煤层和顶板向采空区侧倾斜的应力集中拱形范围。路边支护的砌筑位置应在工作面后方一定距离,有利于避免动压对支护效果的影响。
In most cases,the study of static stability is the study of surrounding rock stability.The environment and mechanical properties of surrounding rocks have a significant influence on the stability of surrounding rocks,and the existence and uncertainty of weak structural plane have a great influence on the evaluation of goaf stability of open-pit coal mine group.Considering the ground pressure in the goaf of open-pit coal mine group,the causes of rock lateral movement were studied by 3D numerical simulation.The simulation results show that the influence range of overload collapse stress concentration on goaf side not only acts on coal seam,but also forms an arched range of stress concentration inclined from coal seam and roof to goaf side.The masonry position of roadside support should be a certain distance behind the working face,which is beneficial to avoiding the influence of dynamic pressure on the supporting effect.
作者
石兴国
韩永生
赵斌
SHI Xingguo;HAN Yongsheng;ZHAO Bin(Wuhai Wanqi Jinghua Coal Industry Co.,Ltd.,Wuhai 016000,Inner Mongolia China)
出处
《粘接》
CAS
2022年第11期165-168,共4页
Adhesion
基金
内蒙古自然科学基金项目(项目编号:2016BS0510)。
关键词
露天煤矿
采空区
侧向围岩
数值模拟
open pit coal mine
goaf
lateral surrounding rock
numerical simulation
