论文部分内容阅读
通过对焦煤集团古汉山矿巷道顶板岩层赋存规律进行总结,对其顶板赋存状态分为3种类型,针对3种类型的煤层顶板,应用岩石破裂过程分析系统(RFPA2D)对其冒落过程进行分析,分析结果可以看出,导致顶板岩层破坏的机理是在剪切应力的作用下,层状顶板的整体跨落,剪切应力和拉应力共同作用,层状顶板破坏形式为冒落拱形;但顶板的冒落形态还与顶板软弱岩层厚度、软弱顶板中是否含有坚硬夹层、坚硬层状顶板中含有软弱夹层等情况有关。
By summarizing the occurrence rules of roof rock strata in Gushanshan mine roadway of Coking Coal Group, three types of top rock strata occurrence state are classified into three types. For the three types of coal seam roofs, the rock burst process analysis system (RFPA2D) Process analysis and analysis shows that the mechanism leading to the failure of roof rock strata is that the shear stress and tensile stress act together under the action of shear stress and the failure form of the layered roof is falling However, the shape of the roof is also related to the thickness of roof weakness, the presence of hard interlayer in the weak roof, and the presence of weak interlayer in hard layered roof.