中文摘要：

通过相似模拟实验技术建立相似比为1∶200的采场及上覆岩层模型,基于岩层的关键层理论对煤层采动过后的岩层移动进行理论分析,得出采煤工作面在推进120 m后,分布在关键层下部的上覆岩层发生离层并随着时间的增加进而影响到地表变形。利用建立的相似模型,模拟由地面向覆岩打钻孔至主要离层空间进行注浆,利用超高水材料良好的流动性、凝固时间可调及三向应力状态下不可压缩的特性,在地表下沉之前对离层裂隙进行充填,来控制由于煤层开采导致的地表沉陷。考虑到超高水材料的流动性、强度及凝固时间须符合注浆充填的要求,通过配比实验确定充填的材料的水灰比为1∶12。

英文摘要：

The overlying strata and stope model with 1 ∶200 similarity ratio was established by simulation experiment technology, the theoretical analysis of the strata movement after mining coal seam was conducted based on the rock layer theory, the overlying strata under the key strata has separations and affects the surface deformation with time increasing after the coal mining working face being advanced of 120 m. The similar model from the ground to the overlying rock drilled grouting and the main separation space was established, the fracture of separated layer was filled by taking high water material advantages of good liquidity, adjustable solidification time and incompressible feature under three-dimensional stress, controlling surface subsidence by mining. Considering the grouting requirements of liquidity strength and solidification time of the high water material, the water cement ratio of the filling materials was settled as 1∶12.