关键词: 逆冲断层, 巨厚砾岩, 诱冲机制, 冲击地压, 微震活动

Abstract: 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.