煤层冲击倾向性试验及数值模拟

冲击地压是一种特殊的矿山动力现象,而冲击倾向性是煤岩体发生冲击地压的内在因素和必要条件.对松树镇煤矿主采煤层进行冲击倾向性试验,对冲击能量指数、弹性能量指数和动态破坏时间三个煤层冲击能量指标进行分析,得出煤层无冲击倾向性.但对开采煤层数值模拟,得出深部煤层顶部最大主应力值、顶板下沉较大,需要实施一定的防治措施.这为该矿防治冲击地压提供了科学依据.

Experiment and Numerical Simulation of Coal Burst Tendency

Rock burst is a special mine dynamic phenomenon and tendency of rock burst is inherent factor and essential condition to the rock burst of the coal and rock. It can come to the conclusion that the coal seam has no burst tendency through experiments of coal burst tendency in a coalraine of Songshu Town and analysis on impact energy index, elastic energy and dynamic destruction time. Through the numerical sim- ulation of mining coal seam get the maximum principle stress value and roof sinks greater,se it need to take a certain preventive measure. This provides a scientific basis for preventing of rock burst in this coalmine.