研究顶板-煤体-底板所构成的组合煤岩体试样变形破裂规律及冲击倾向性对于预测冲击矿压具有非常重要的实践意义。
It is necessary to research into the burst failure and rock burst tendency of combined sample which is made up of roof, coal and floor.
前言： 运用岩石破裂过程分析RF PA2D 系统，对采空区顶板大面积冒落过程进行了数值模拟研究。
Roof falling of mined out area was numerically studied by using a rock failure process analysis software(RFPA2D).
对于覆岩应力场和覆岩破裂有影响的采矿因素是工作面推进速度、采矿周期性和顶板管理方法。
The mining procedures which have an influence on the stress field in the strata and the fracturing of the roof are the rate of daily face advance, the mining rhythm, and the nature of working.
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