林南仓矿井施工,曾因岩石膨胀而造成巷道底臌、挤垮等事故。如-240水平西翼采区回风石门,穿过膨胀性岩石,砌筑双料石(石旋),巷道压力大、底臌,前面施工,后部(石旋)即被挤垮,施工非常困难;-240水平煤_(8-2)回风下山绞车房通路,施工不到半年,由于压力大、底臌,料石(石旋)挤垮,金属支架严重变形,整个通路堵塞,影响回风;-400水平副石门巷道砌筑双料石(石旋),由于穿过膨胀性岩石,顶板压力大、底臌,巷道变形严重,被 Lin Nancang mine construction, has caused due to rock expansion at the end of tunnel, collapse and other accidents. Such as the level of -240 horizontal West mining area back to the stone door, through the expansive rock, masonry double stone (stone spin), roadway pressure, at the end of 臌, front construction, the rear (stone) is crushed, construction is very Difficult; -240 level of coal _ (8-2) return wind down the winch room access, less than half a year construction, due to the pressure, the end of 臌, stone (stone rotary) crowded, serious deformation of the metal stent, the entire blockage, affecting Back to the wind; -400 level Shimen Roadway masonry double stone (stone spin), due to the expansive rock through the roof pressure, bottom 臌, roadway deformation is serious