采动诱发断层损伤滑移及其影响因素敏感性分析

发布时间：2018-06-18 15:56

本文选题：采动影响 + 断层损伤变量　；参考：《煤炭学报》2017年S1期

【摘要】：为研究采动诱发断层损伤滑移演化规律,结合现场微震监测,引入断层损伤变量作为评价断层滑移失稳的指标。并运用正交模拟试验,对断层损伤变量影响因素进行敏感性分析。研究表明:工作面开采影响下断层损伤滑移分为断层损伤起裂、断层扩展贯通、断层滑移错动3个阶段。随工作面靠近断层,断层损伤变量呈逐渐增大趋势。断层损伤变量受开采因素、断层因素、地应力水平3者综合影响。确定开采因素中工作面距断层距离、工作面斜长对断层损伤变量影响为高度显著,采厚影响不明显。断层因素中断层倾角、断层内摩擦角对断层损伤变量影响为高度显著,断层内聚力为一般显著,其它断层因素影响不明显。地应力水平中侧压系数对断层损伤变量的影响高于埋深。
[Abstract]:In order to study the evolution law of fault damage and slip induced by mining, combined with field microseismic monitoring, fault damage variable is introduced as an index to evaluate fault slip instability. The influence factors of fault damage variables were analyzed by orthogonal simulation test. The results show that the fault damage and slip can be divided into three stages: fault damage and fracture initiation, fault expansion and penetration, and fault slip dislocation under the influence of working face mining. With the face close to the fault, the fault damage variable increases gradually. The damage variables of fault are affected by three factors: mining factor, fault factor and in-situ stress level. It is determined that the influence of the distance from the face to the fault and the inclined length of the working face on the damage variable of the fault is significant, but the influence of mining thickness is not obvious. Among the fault factors, the influence of fault dip angle and fault friction angle on fault damage variables is highly significant, fault cohesion is generally significant, and other fault factors have no obvious effect. The influence of lateral pressure coefficient on the damage variable of fault is higher than that of buried depth in in-situ stress level.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;
【基金】：国家重点研发计划资助项目(2016YFC0801401,2016YFC0600708)
【分类号】：TD325

【相似文献】