多重构造区叠加影响下矿井冲击地压显现规律

Rock burst behavior law of mine under superposition influence of multiple tectonic zones

为研究断层-褶曲双重构造影响下巷道应力分布规律及抗冲机制,以唐安煤矿为工程背景,通过FLAC^(3D)建立数值模型,分析了构造类型、断层倾角以及煤体强度对构造影响区应力的影响特征。模拟结果表明,断层-褶曲构造、F3断层倾角为65°、煤体弹性模量为2.6 GPa是引起应力集中发生冲击事件的重要因素。同时分析微震事件监测数据,划分高低能级事件,确定了巷道采掘及服役期间冲击发生原因,并给出了合理的抗冲措施。

In order to study the stress distribution law and anti-rock burst mechanism of roadway under the influence of fault-fold dual structure,a numerical model was established through FLAC^(3D)to analyze the influential characteristics of structural type,fault dip angle and coal strength on the stress in the tectonic influential zone,and the simulation results showed that the fault-fold structure,F3 fault dip angle of 65°and coal elastic modulus of 2.6GPa were important factors causing stress concentration-induced rock burst events.At the same time,the monitoring data of microseismic events were analyzed,the high and low energy level events were divided,the causes of the rock burst during roadway mining and service were determined,and reasonable anti-rock burst measures were given.