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矿井泥石流对矿区开采危害极大,应用崩落法开采的矿山尤为如此。矿井泥石流一般多发生在矿体上部的几个分段。在未形成足够厚的围岩(或矿石)覆盖层,而与矿体直接接触的顶板或围岩又有通道与上部大量泥石堆积层相通的情况下,季节性大暴雨往往使泥石流涌入矿井。我矿一九八○年七月二十八日在采场暴发的一起泥石流就是一例。我矿利用分段崩落法开采的860分段,回采矿石不过千余吨。因顶板溶洞发育,矿石和围岩(硅化白云岩)风化严重,在一场大暴雨后,泥石流从采空区突然暴发,堵塞了
Mines and debris flow mining is extremely harmful to the mining area, especially in mines exploited by caving method. Mine debris flow generally occurred in the upper part of the ore several segments. In the case that the surrounding rock (or ore) covering is not formed sufficiently thick, and the roof or the surrounding rock in direct contact with the ore body is connected with a large amount of debris accumulation layer in the upper part, the seasonal heavy rain often causes the debris flow to flow into the mine . One example is the mudslides that hit the mine site on July 28, 1980. I use sub-caving mining section 860 section, mining ore, but more than a thousand tons. Due to the development of roof caverns, the ores and surrounding rocks (silicified dolomites) are heavily weathered. After a heavy rainstorm, debris flow suddenly erupted from the goaf and clogged