断层落差影响下的采动应力演化规律数值模拟  

Numerical Simulation of Evolution Law of Mining Stress Under the Influence of Fault Drop

作　　者：常双栋 闫书亚 Chang Shuangdong;Yan Shuya(Henan Longyu Energy Co.,Ltd.,Henan Yongcheng 476600)

机构地区：[1]河南龙宇能源股份有限公司,河南永城476600

出　　处：《山东煤炭科技》2023年第2期170-172,175,共4页Shandong Coal Science and Technology

摘　　要：为研究断层落差影响下的采动应力演化情况,构建了断层力学模型,以逆断层为例分析断层附近支承压力分布状态,研究断层面应力状态;利用FLAC^(3D)数值软件模拟了2 m、5 m、7 m、10 m断层落差条件下的采动应力情况,并且每种断层落差下设置10 m、20 m、30 m、40 m、50 m煤柱。研究发现:断层落差对应力集中具有明显作用,另外,煤柱尺寸对于应力集中程度也具有不可忽视的影响。In order to study the evolution situation of mining stress under the influence of fault drop,a fault mechanics model is constructed,and the abutment pressure distribution near the fault is analyzed by taking the reverse fault as an example,the stress state of the fault plane is studied,and the mining stress situation under the condition of 2 m,5 m,7 m and 10 m fault drop is simulated by FLAC^(3D) numerical software,and the coal pillars of 10 m,20 m,30 m,40 m and 50 m are set up under each fault drop.It is found that the fault drop has an obvious effect on the stress concentration.In addition,the size of the coal pillar also has an unnegligible effect on the stress concentration.

关 键 词：冲击地压 断层 应力集中 煤柱 数值模拟 

分 类 号：TD323[矿业工程—矿井建设]