中文摘要：

为了揭示上薄下厚近距离煤层同采覆岩破断结构特征,保障下位厚煤层顶板的稳定,本文根据泉店煤矿东翼11采区首采面的近距离煤层群地质赋存条件,采用相似模拟研究了上薄下厚近距离煤层群同采覆岩破断规律,进而分析了下位厚煤层覆岩在开采影响范围从上到下是由断裂块体、破碎体、破裂体、较完整岩层等不同介质组成的,建立了上薄下厚近距离煤层群同采支架-围岩关系模型,揭示了其相互作用体系由支架-组合悬梁结构-松散结构-铰接顶板结构组成,推导出支架工作阻力的计算公式。实例计算了泉店煤矿二1-11070综放工作面支架的支护阻力,为支架选型提供理论依据,并现场实测了支架阻力,实测结果与理论计算结果较为接近,该理论可为类似条件下的顶板控制提供参考。

英文摘要：

In order to reveal the failure characteristics of strata with upper thin and lower thick strata in ultra-close coal seams with simultaneous mining and to guarantee the roof stability of the lower thick coal seam, the broken laws of overlying strata with upper thin and lower thick strata in ultra-close coal seams with simultaneous mining are studied based on the geological conditions of ultra-close coal seams in the first mining face of the 1 lthrnining section of Quandian coal mine by physical simulation studies. Analysis results are as list： the overlying strata of lower thick coal seams from top to bottom are composed of fracture blocks, fragments, rupture mass, complete strata and so on; the relationship model of support-surrounding rock in upper thin and lower thick ultra-close coal seams with simultaneous mining is developed. The interaction system is consisted of support-combination suspension girder structure - loose structure - articulated roof structure and the calculation formula of support working re- sistance is derived. The supporting resistance of shields in No.21-11070 fully mechanized caving mining working face in Quandian coal mine is calculated which provides theoretical basis for the shield selec- tion. The shield support resistance measured in the mining face is close to theoretical calculation results. It can provide a theoretical basis of the roof control under similar conditions.