摘要
以红岭煤矿沿F505正断层走向布置的上盘工作面为背景,采用数值模拟软件FLAC3D,研究了在断层倾角不同的情况下,上盘工作面开采采动应力及断层滑移规律。结果表明,断层倾角越大,断层煤柱及断层侧工作面超前支承压力集中程度越高,采动空间冲击危险性越高;断层滑移量与煤柱应力峰值变化趋势相同,均随着断层倾角的增加而增加,由于上覆岩层跨落角与断层倾向相反,断层对顶板活动的影响较小,而且断层倾角越小煤层顶板越不易受到断层影响。
Based on the upper face of the coal seam along the direction of F505 normal fault in Hongling Coal Mine,the 3 D explicit finite difference software FLAC3 Dwas used to study the mining stress and fault slipping on the top face of the working face with different fault dip angles. Law of movement. The study shows that the greater the fault dip angle is,the higher the stress concentration of the lead bearing on the fault coal pillar and the fault side working face is,and the higher the space shock risk is. The trend of fault slip and coal pillar stress are the same and both increase with the increase of fault dip angle. Because the overburden angle of the overlying strata is opposite to the fault inclination,the influence of the fault on the roof activity is smaller,and the fault dip angle is smaller. The top plate is less susceptible to faults.
作者
王璐
Wang Lu(School of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《煤》
2018年第7期8-10,50,共4页
Coal
基金
山东省自然科学基金资助项目(ZR2018PEE007)
