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本文借助于相似材料模拟试验对岩层地表重复采动规律进行探讨。文中提出了初采和重采时采空区支承压力区内应力变化特征,分析了重采时地表移动加剧的原因,提出了重采时地表下沉分布产生变异的概念并对此进行了论述。最后,给出了预计下沉加剧系数的经验公式。
In this paper, similar material simulation tests are carried out to study the law of repeated mining on the ground surface. In this paper, the characteristics of stress changes in the bearing pressure zone of goaf during initial recovery and re-mining are presented. The reasons for the aggravating of surface movement during heavy recovery are analyzed. The concept of variation in surface subsidence distribution during re-mining is proposed and discussed . Finally, the empirical formula of the expected sinking exponential coefficient is given.