中文摘要：

采用相似模型试验和数值模拟相结合的方式,分析了奥陶系石灰岩推覆体含水层下煤层开采的覆岩破坏及地表沉陷特征.经验公式计算,相似模型试验和数值模拟的对比分析表明：该特殊地质条件下,不考虑渗流场影响时,垮落带高度为采厚的2.2-4.5 倍,导水裂隙带高度为采厚的14.0-19.1 倍;渗流场的存在使导水裂隙带及垮落带高度增加,此时垮采比为4.8,裂采比为20.6.因此,从偏安全的角度考虑,煤层的实际开采过程应考虑渗流场的影响,以渗流场-应力场耦合作用下的导水裂隙带高度作为安全煤（岩） 柱合理留设的依据.

英文摘要：

Similarity model test and numerical simulation were combined to analyze failure characteristics of the overburden and the laws of ground subsidence, which was induced by mining of the underlying Ordovician limestone nappe aquifer. The comparative analysis of empirical formula, numerical simulation, and similarity model test shows that under this special geological condition, without the consideration of the influence of seepage, the height of water flowing in a fractured zone and caving zone is 14.0~19.1 times and 2.2~4.5 times of mining thickness, respectively;when the influence of seepage is taken into account, the height of water flowing in a fractured zone and caving zone increases to 20.6 times and 4.8 times of mining thickness, respectively. Therefore, from the safety perspective, the influence of seepage should be considered in the process of actual mining, and the height of water flowing in a fractured zone with seepage-stress field coupling is more reasonable for designing safety coal (rock) pillars.