【摘要】 急倾斜煤层Z型通风留巷水平分层放顶煤采煤方法是针对厚度为5~8 m急倾斜煤层新的有效开采方法。然而对该方法的上覆岩层规律研究还相对欠缺。该文章通过理论分析和RFPA2D数值模拟分析,得出该方法在开采过程中倾斜方向上覆岩层上部运动比较剧烈、范围比下部大且易形成铰接结构,进而可借助水平分层综放工作面合力在分层顶煤剖面处投影为一点没有产生下滑的力对顶板岩层移动规律进行分析,为工作面的支架选型和支护理论提供依据,并对该方法的完善和推广奠定坚实基础。更多还原

【Abstract】 The horizontally stratified roof caving mining method for steeply inclined coal seam with Z type ventilation roadway is suitable for steep coal seam with a thickness of 5 ~ 8 m. However,knowledge about the movement of the overlying rock is still deficient. Through theoretical analysis and RFPA2D numerical simulation analysis,it is shown that the upper strata movement is quite severe under this mining method,covering a bigger area than in lower strata,and forming hinged structure easily. By means of the horizontal slice full-mechanized caving mining the face forces in stratified top-coal sections place projection to a point without producing declining force for roof strata movement. The analysis of the movement of the overlying rock layer can provide theoretical basis for selection of the working face support,and lay a solid foundation for improving the mining method.更多还原