...开采；覆岩运动；结构模型；开裂；来压步距 [gap=1036]Keywords : strip pillar;backfill mining;overburden strata movement;structure model;cracking;roof weighting step ..
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The overburden strata movement is a complicated time and space process.
覆 岩层的运动是一个复杂的时空过程。
Based on the similar material simulation and prectical experiment in situ, the movement charactedistic of overburden strata of longwall sublevel caving method has been studied in the paper.
本文用相似材料模拟，现场实测等方法研究放顶煤开采覆岩活动规律。
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