断层对工作面顶板涌突水影响的数值模拟研究

工作面附近存在断层时,裂隙的发育高度有较大增长,断层也可能“活化”突水,增加了防治水的难度。以新巨龙煤矿工作面为原型,基于UDEC软件,建立断层倾角为30°、45°、60°和75°的数值模型,分别模拟工作面从断层上盘至下盘和下盘至上盘的推进过程,通过对最大裂隙高度增长率、断层面监测点最大剪应力和垂向位移量的分析,得到采动过程中裂隙发育高度和断层“活化”规律。

Numerical Simulation Study on Influence of Fault on Roof Water Inrush in Working Face

When there is a fault near the working face,the development height of the fracture increases greatly,and the fault may"activate"water inrush,which increases the difficulty of water control.Taking the working face of Xinjulong Coal Mine as the prototype,based on UDEC software,the numerical models with fault dip angles of 30°,45°,60°and 75°are established to simulate the advancing process of working face from hanging wall to footwall and footwall to hanging wall respectively.Through the analysis of the growth rate of the maximum fracture height,the maximum shear stress and the vertical displacement of the monitoring points on the fault surface,the fracture development height and the"activation"law of the fault in the process of mining are obtained.