Surface collapse of coal field is one kind of geological disaster with great hazard, which may result from distortion and breakout of overlying strata that lose their support after underground coal beds are excavated in a large area.

• 摘要采煤区地面塌陷是由于地下煤层大面积采空引起上覆岩层失去支撑而变形崩落最后导致地面沉降一种危害很大的地质灾害。