Overlying Strata Subsidence Rule Based on Different Filling Rate
The status of coal in China is self-evident,but coal mining will damage the overlying strata and cause the subsidence of overlying strata.Therefore,numerical simulation was used to analyze the subsidence of overlying strata under different filling rates in Danshuigou Coal Mine.The results show that the stress peak value of the overlying strata above the goaf is inversely proportional to the filling rate of the goaf,the higher the filling rate of the goaf is,the smaller the peak stress of the overburden rock is,and the smaller the goaf filling rate is,the larger the peak stress of the overburden rock is;influenced by the filling rate of the goaf,the subsidence of the overlying strata under different filling rates are different,the higher the filling rate is,the smaller the subsidence of the overlying strata is,and the smaller the subsistence rate is,the greater the overburden subsidence is;at the time of advancement to 80 m,due to the influence of mining and filling,the subsidence of the overlying strata was gradually compacted and supported the overlying strata,therefore the subsidence did not continue to increase,but the subsidence of the overlying strata was reduced along with the working face,until it tended to be in an early stage of exploitation.
subsidence of overlying stratadifferent filling ratestress peak
万方数据
维普
