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本文通过现场地质调查及变形观测分析后提出．近百年来马步坎高边坡Ｔ３３岩组中煤层普遍被开采．使Ｔ３３上部坡体发生向坡外的掀斜沉陷．是导致坡顶后缘拉裂一沉陷进一步发展的直接原因。如无新的采掘活动、随着时间的推移．最终将会自行稳定下来。并通过有限元计算．模拟再现了采掘与坡顶后缘拉裂一沉陷变形的发展。
This article is put forward by on-site geological survey and deformation observation analysis. Nearly a hundred years Mbu Keng high slope T33 rock group generally mined. So that the upper slope of the T33 tilt tilt subsidence to the slope. Is the direct cause of the further development of the leading edge of the top of the slope cracking. If no new extractive activities, over time. Will eventually stabilize itself. And through the finite element calculation. The simulation reproduces the development of excavation and deformation of the subsidence at the trailing edge of the slope.