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以岩石力学、流体力学为基础，采用相似材料模拟手段，对覆岩离层充填减缓地表沉降机理进行了系统的实验室研究．揭示了覆岩内部离层产生和发展的时间与空间规律；探讨了浆液在离层空间的流动规律和存在状态，阐明了充填材料脱水后与注浆压力的关系及其对减沉效果的影响作用；提出了浆液以钻孔为中心呈二向点源式流动特征，为解决实际工程问题提供了科学依据．
Based on rock mechanics and fluid mechanics, similar material simulation methods were used to systematically study the mechanism of surface subsidence caused by the stratified filling of overlying strata. The temporal and spatial rules of the formation and development of the strata in the overburden strata are revealed. The flow and the existing state of the strata in the stratified layer are discussed. The relationship between the grouting material dehydration and the grouting pressure and its effect on the sinking effect are clarified And proposed a two-point point source flow characteristics of the slurry centering on the borehole, which provided a scientific basis for solving practical engineering problems.