【摘要】 以榆神矿区大保当普查区为研究区,分析了区域地质条件和典型钻孔数据资料,针对该矿区主采煤层构建了不同岩土比类型的数值模型,运用数值模拟实验的方法研究在地质条件和开采工艺相同的情况下,覆岩岩土比对开采沉陷的影响规律。结果表明:在不同的埋深水平下,下沉系数都会随着岩土比的增大而减小,且变化趋势有所不同;随着岩土比的增大,采高对下沉系数的影响程度呈现先增大后减小的变化趋势,一般当岩土比为4∶1~8∶1时,采高的变化对下沉系数的影响程度最大;基于数值模拟实验结果,发现超过100 m的巨厚土层具有降低下沉系数的效应。更多还原

【Abstract】 Taking Dabaodang survey area of Yushen Coal Mining Area as study area,according to the regional geological occurrence conditions and typical drillings data,the influence laws of the rock-soil ratio impacting the mining subsidence is researched with the method of numerical simulation under the same geological conditions and mining technology. The results show that: in different depth levels,the subsidence coefficient could decrease with the increase of the rock-soil ratio,and the change process of the rock-soil ratio impacting subsidence coefficient is different; in the different depth levels,with the increase of the rock-soil ratio,this influence extent presents the trend of becoming larger firstly and then smaller,and becomes largest generally while the rock-soil ratio is from 4∶ 1to 8∶ 1. According to the results of numerical simulation,the giant thick soil that is more than 100 m could cut down the subsidence coefficient.更多还原