摘要
巷道围岩塑性区与其变形破坏具有直接相关关系,基于此,本文首先通过理论分析获得了采空区覆岩垮落程度,在此基础上建立数值模拟模型,基于采空区应力传递的力学机制分别研究了留巷和掘巷两种不同模式下工作面采动对区域应力场和巷道围岩塑性破坏的分布规律。研究表明:不同模式下的巷道区域应力场与围岩强度相关,且最大主应力值差异较小,但是通道应力场下围岩塑性区差异巨大,具有明显的时间差异性下的围岩劣化程度差异。该研究结果对于巷道布置方式具有一定参考价值。
The plastic zone of the surrounding rock of the roadway is directly related to its deformation and damage.The numerical simulation model is established based on the collapse degree of the overlying rock in the goaf which is obtained by the theoretical analysis.Based on the mechanical mechanism of the stress transfer in the goaf,the paper studies the damages on the regional stress field and the roadway surrounding rock plasticity under the two different modes of gob-side entry driving and gob-side entry retaining.The study shows that under different modes,the roadway stress field is related to the surrounding rock strength,with small maximum principal stress value difference.However,under the channel stress field,the surrounding rock in the plastic zone has different deterioration degrees with the time differences.The study results have certain reference value for the roadway layout.
作者
李臣
陈团团
王孝臣
LI Chen;CHEN Tuantuan;WANG Xiaochen
出处
《中国矿山工程》
2022年第4期51-55,共5页
China Mine Engineering
基金
中煤科工集团武汉设计院有限公司创新项目(ZZYF202241)。
关键词
应力传递
巷道开挖
最大主应力
围岩塑性区
stress transfer
roadway excavation
maximum principal stress
surrounding rock plastic zone
