覆岩层破坏理论在采区地基稳定性评价中的应用 ——以吉林九台营城煤矿为例

煤层开采后，上覆岩层将形成冒落带、裂缝带和弯曲带。根据营城煤矿研究区自然地理条件、区域地质条件和工程水文地质条件，应用覆岩层破坏理论，得出营城煤矿最大冒落裂隙带高度和建筑物荷载的最大影响深度之和为270 m，远小于该区域煤层最小开采深度( 838 m) ，该区不会产生较大的不均匀沉降。

Application of overlying strata damage theory in evaluation on foundation stability: taking Yingcheng coal mine in Jiutai of Jilin as an example

After coal-bearing bed mining,the caving zone,fractured zone and bend zone would form in the overlaying strata.According to the natural geographical,regional geological and hydrological geological conditions in Yingcheng coal mine,combining with overlaying strata damage theory,the height of caving fractured zone and the biggest influence depth of the building of Yingcheng coal mine are sum for 270 m,which far less than the minimum coal mining depth(838 m),therefore,the region will not produce larger uneven settlement.