摘要
为研究断层防水煤柱挖潜对断层的影响,分析断层活化的危险性,应用FLAC3D数值模拟分析软件,以荆各庄矿1196F工作面开采挖潜F3断层防水煤柱为原型,对煤柱挖潜影响下F3断层活化进行了数值模拟分析。研究表明:F3断层防水煤柱的挖潜,打破了原有的应力平衡,在一定程度上影响了断层带内的应力分布,致使断层上下盘的应力增量和位移显著不同,并在工作面斜上方断层带内产生了剪应力变形增量集中,该位置最易引发断层活化,但由于F3断层挖潜后还剩60m宽度,煤柱挖潜对F3断层的影响是局部的,没有引起断层带内物质产生剪切破坏,F3断层没有产生活化。该结论得到了物探和钻探成果的验证。
To study impacts from fault water barrier potential tapping, analyze fault activation hazard, using the FLAC3D numerical simulation software, taking the working face 1196F fault F3 water barrier potential tapping in the Jinggezhuang coalmine as prototype, carried out numerical simulation analysis for fault F3 activation induced by coal pillar potential tapping. The study has shown that the F3 fault water barrier potential tapping has disequilibrated original stress balancing, impacted stress distribution within fault belt a certain extent. So that have caused distinctly different of stress increments and displacements between hanging wall and footwall, produced shearing stress increment concentration within faulted belt above working face. That position is most easily to induce fault activation, but after potential tapping still remained 60m extent of coal pillar, so the potential tapping impact on fault F3 is limited, has not produced failure by shearing, fault F3 has not been activated. The conclusion has been verified by geophysical prospecting and drilling results.
出处
《中国煤炭地质》
2014年第8期83-86,共4页
Coal Geology of China
基金
国家自然科学基金(51204069)
中央高校基本科研业务费资助(3142014002)
关键词
煤柱
挖潜
断层活化
数值模拟
coal pillar
potential tapping
fault activation
numerical simulation
