分层方式对煤层开采覆岩活动的影响研究

Study on the Influence of Stratification Mode on Coal-bedding Activities

以潘二矿3煤层为分析对象,运用FLAC3D数值模拟软件,研究厚~巨厚煤层分层开采方式对覆岩活动规律的影响。研究结果表明:累积采厚相同,分层次数多,顶板失稳的概率大;累积采厚和层数相同,先厚后薄开采,顶底板岩层位移量小,反之则大;在不考虑岩层应力的情况下,应优先选择先厚后薄且尽量少分层的开采方式。

Taking the No.3 coal seam of Pan'er Coal Mine as the analysis object,the influence of slicing mining mode on overlying rock movement law is studied by using FLAC3D numerical simulation software.The research results show that:the same cumulative mining thickness,more layers,the probability of roof instability;the same cumulative mining thickness and layer number,first thick and then thin mining,roof and floor slate layer displacement is small,otherwise it is large;in the case of no consideration of rock stress,the mining method of first thick and then thin and as few as possible slicing should be preferred.