逆冲断层和巨厚砾岩耦合作用诱冲机制研究

为研究巨厚砾岩与大型逆冲断层控制下耿村煤矿13230工作面冲击地压发生机理，对其掘进与回采期间地质特征、微震时空演化、b值及能量特征和地表沉降变化特征展开现场实测分析。研究结果表明：F16断层逆冲滑移运动产生的高水平应力和巨厚砾岩大面积悬顶产生的高垂直应力为冲击地压孕灾提供了力源条件|13230工作面掘进末期、开切眼及回采初期距离F16断层较远，断层滑移运动影响较小而巨厚砾岩运动作用影响较大，煤岩体能量增长式积聚最终诱发剧烈的冲击地压事故|随着13230工作面逐渐向断层靠近，断层滑移运动影响增强，地表抬升现象明显，煤岩体能量均匀性积聚最终诱发集中式较轻微的冲击显现。研究结果为巨厚砾岩和逆冲断层影响下13230工作面冲击地压发生机理的研究提供理论基础。

Analysis of Coal Bump Mechanism Induced by Coupling Effect of Thrust Fault and Huge Thick Conglomerate

In order to study the coal bump mechanism in 13230 working face of Gengcun Coal Mine under the control of huge thick conglomerate and large thrust faults, field measurement and analysis were carried out on geological characteristics, microseismic spatio-temporal evolution, b-value and energy characteristics and surface subsidence variation characteristics during the period of excavation and mining. The results show that the high-level stress produced by thrust-slip movement of F16 and the high vertical stress produced by large area hanging of thick conglomerate provide the stress condition for coal bump. The distance between 13230 working face and F16 fault is far during the period of excavation and initial mining, so the slip movement of fault has little effect but the movement of huge thick conglomerate has great influence on it, and the increasing energy accumulation of coal and rock mass eventually leads to severe coal bump accident. With the 13230 working face gradually approaching to the fault, the influence of fault slip movement enhances, and the phenomenon of surface uplift is obvious, and the even energy accumulation of coal and rock mass eventually induces concentrated slighter coal bump behavior. The results provide a theoretical basis for the study of coal bump mechanism of 13230 working face under the influence of huge thick conglomerate and thrust fault.