我处在施工大光山二井-150米水平车场大巷时,于一九七九年十月十日九时三十分突然发生一次塌冒事故,险些造成重大伤亡。给施工带来较大影响。下面仅就这次塌冒事故的原因及其教训谈点粗浅的看法。一、工程及地质概况这次塌冒事故发生在由主井井筒转入-150米水平车场的大巷入口处,水平垂 At the time of construction of the lanes at the level of 150 meters in Dakuma Shan-2-Wells, I suddenly encountered a collapse accident at 9:30 on October 10, 1979, almost causing serious casualties. To bring a greater impact on the construction. The following only on the reasons for the collapse of the accident and its lessons talk superficial view. First, the engineering and geological overview The collapse occurred in the incident from the main shaft into the -150-meter level yard parking lot entrance at the entrance, the level of vertical