综放工作面矿压显现数值模拟研究

Study on numerical simulation of strata-pressure behaviors in fully-mechanized caving face

近年来,综合放顶煤开采技术成为我国厚煤层开采中应用最为广泛的技术,针对综放工作面所具有的“加长”、“快速推进”的特点,采用FLAC 3D数值模拟计算研究了其矿压显现规律,模拟分析了综放工作面不同推进速度及不同长度条件下围岩的应力场、位移场及塑性区的分布与演化规律,得出了综放工作面的矿压显现规律,为工作面支架的选型提供了依据。

In recent years,fully-mechanized top coal caving mining technology has become the most widely in thick coal seam in China.In view of the characteristics of strata behaviors of fully-mechanized top coal caving mining,which possessed super-long mining work face and advancing speed.The strata behaviors law was studied by FLAC 3D numerical simulation.The distribution and evolution law of stress field,displacement field and plastic zone of surrounding rock in fully-mechanized top coal caving face under different advancing speeds and different length were simulated and analyzed.The law of ground pressure behavior in fully-mechanized top coal caving face was obtained,which provided basis for the selection of support in working face.