多工作面开采岩层移动及地表沉降规律研究

Study on Law of Rock Strata Movement and Surface Settlement in Multiple Working Face Mining

采用FLAC^(3D)模拟了丰汇煤矿多工作面的开采过程,根据工作面的停采时间,依据先后顺序对各个工作面进行开挖计算,对多个工作面开采诱发的岩层移动及地表沉陷特征进行了分析。多工作面开采会相互影响,主要表现为后续相邻工作面的开采会对已稳定的覆岩结构产生影响,使得沉降盆地进一步下沉和盆地最大下沉点的偏移。

Using FLAC^(3D)to simulate the multiple working face mining process of Fenghui Coal Mine.The excavation calculation of each working face was carried out in order of the stop time of the working face,and the characteristics of the rock strata movement and surface settlement caused by multiple working face mining were analyzed.The multiple working face mining would influence each other.Specifically,the subsequent mining of adjacent working faces would affect the stable overlying strata structure,leading to the further subsidence of the setting basin and the deviation of the maximum subsidence point of the basin.