基于相似材料试验特厚煤层分层开采对断层影响研究

Study on influence of layered mining of extra thick coal seam on faults based on similar materials test

为了研究某矿特厚煤层分层开采对断层的影响,根据煤层实际情况,采用相似材料模拟试验的方法,研究了特厚煤层分层开采下断层的发育规律。结果表明:F18和F16受开采影响大,破坏严重,F1断层距离煤层较远,相对受扰动较轻;因工作面推进方向和断层倾斜方向一致,致使各断层上方的移动变形大于下方的移动变形,使得F1上盘含水层的水容易通过采动裂隙导入工作面;断层F18与工作面侧岩层交汇面的移动数值最大,开采拟3工作面时被采动裂隙贯通地表;重复采动57002工作面时,导水断裂带将会导通地表。

In order to study the coal mining thick coal seam layering mining influence on fault,according to the actual situation of coal seam,using the methods of similar material simulation experiment,the development regularity of the fault influenced by the special thick coal seam layering mining.The results show that F18 and F16 are greatly affected by mining and seriously damaged.The working face advancing direction is the same with the fault dip direction,causing the fault at the top of the mobile deformation is greater than at the bottom of the movement,makeing F1 in aquifer groundwater easily through mining fissure import face;The movement value of fault F18 at the interface between the rock strata on the working face and the working face is the largest.When the 57002 working face is repeatedly mined,fault development causes similar materials in the water-conducting fracture zone to reach the bottom of the load,indicating that the water-conducting fracture zone may reach the surface.