断层倾角对断层活化与底板突水影响的数值模拟研究  

Numerical simulation of the effect of fault inclination on fault activation and water inrush from floor

作　　者：贾晓亮 

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037 [2]国家煤矿安全技术工程研究中心,重庆400037

出　　处：《煤炭工程》2017年第4期90-93,共4页Coal Engineering

摘　　要：为了研究断层附近矿井突水事故的发生机理,利用有限差分数值模拟软件FLAC3D模拟分析不同倾角的断层在采掘扰动影响下的地应力场和塑性区情况。结果表明:断层倾角越大,断层面上的剪应力和法向应力越大;采掘处以深断层活化范围大于采掘处以浅断层活化范围;小倾角正断层更容易产生贯通作业面底板与含水层的裂隙。利用该软件,在临近断层开采区内对断层附近地应力场和塑性区的模拟,有助于确定断层防水煤柱的留设宽度和预防矿井突水事故的发生。In order to study water inrush mechanism,finite difference numerical simulation software FLAC3 Dwas applied to analyze the stress field and plastic zone in different fault dip.The results show that larger inclination means larger fault plane shearing force and stress; fault activation range below the mining level is greater than the above; fractures are easier to form in the floor and aquifer for small angle normal faults in cut-through working face.The simulation of stress field and plastic zone near the fault around the mining area using the software,will help to determine the width of the fault waterproof coal pillar and to prevent the occurrence of mine water inrush accident.

关 键 词：断层倾角 断层活化 底板突水 地应力 塑性区 FLAC3D 

分 类 号：TD745.2[矿业工程—矿井通风与安全]