大吉山钨矿是含钨石英脉大型黑钨矿床,有工业矿脉96条,矿脉为急倾斜薄矿脉,围岩种类为变质砂岩、闪长岩、花岗岩,矿岩硬度f为8～14,矿石稳固或中等稳固。 50年代开始,我矿从事这类矿床开采,在天井掘进方面一直采用普通支柱法。由于此法作业条件差,劳动强度大,效率低,材料消耗量 The Dajishan tungsten deposit is a tungsten-bearing quartz vein large-sized wolframite deposit. There are 96 industrial veins, the veins are steeply inclined thin veins, and the surrounding rock types are metamorphic sandstones, diorites and granites. The rock hardness f is 8 to 14 and the ore Stable or moderately stable. Since the 1950s, the mine has been engaged in the mining of such deposits and has used ordinary props for tunneling. Due to poor working conditions of this method, labor intensity, low efficiency, material consumption