断层带强度对采动应力影响的数值模拟  

Numerical Simulation on Influence of Rock Mass Strength on Mining Stress Distribution in Fault Zone

作　　者：李先平 LI Xianping(School of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤矿安全》2018年第12期208-211,共4页Safety in Coal Mines

摘　　要：以工作面沿断层走向推进为工程背景,采用FLAC3D数值模拟软件,根据岩体强度指标GSI确定断层带弹性模量,并分析了不同断层带岩体强度指标GSI条件下,断层带对采动应力分布的影响。研究表明:工作面沿断层走向推进时,下盘工作面断层煤柱以及工作面超前支承应力集中较上盘工作面回采时更高,断层对下盘工作面回采时采动应力分布的影响更明显。断层带岩体质量指标GSI值越小,断层煤柱以及工作面超前支承应力集中更明显,即断层岩体裂隙越发育对采动应力的阻隔作用越强。Based on the working face advancing along the fault strike as the engineering background, using FLAC3 Dnumerical simulation software, the elastic modulus of fault zone is determined according to geological strength index(GSI), the influence of the fault zone on the mining stress distribution under GSI is analyzed. The study shows that when the working face is pushed along the fault direction, the stress concentration of the fault pillar and the advance support of the working face is higher than that of the upper working face, and the influence of the fault on the mining dynamic stress distribution is more obvious. The smaller the GSI value in the fault zone, the more obvious the concentration of the advanced support stress in the fault coal pillar and working face, that is, the more developed the fault rock mass fracture is, the stronger the blocking effect on the mining dynamic stress is.

关 键 词：断层 岩体地质强度指标 数值模拟 采动应力 弹性模量 超前支承应力 

分 类 号：TD323[矿业工程—矿井建设]