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我矿杨林坳矿区主矿体西南边缘部分在四中段以上,垂直厚度为10～14米,水平厚度为30米,走向长度为20米,矿量约1.8万吨,有用矿物白钨和黑钨局部富集,品位达0.8～1.74%,为矿区平均品位的2～4倍。矿石为砂岩类型,中等稳定。开采这部分矿体,底部结构无法布置在矿体下盘,只能布置在矿体中,为了减少压矿,要求底柱高度越小越好。基于上述情况,若采用电耙道底
The main orebody of Yanglin Ao mine in I Mine has a southwestern margin of more than four midsections, a vertical thickness of 10 to 14 meters, a horizontal thickness of 30 meters and a length of 20 meters. The ore amount is about 18,000 tons. The useful minerals white tungsten and black Local enrichment of tungsten, grade of 0.8 ~ 1.74%, for the mining area average grade of 2 to 4 times. Ore is a sandstone type, moderately stable. Mining this part of the ore body, the bottom of the structure can not be arranged in the ore body under the plate, can only be arranged in the ore body, in order to reduce the pressure, the bottom pillar height requirements as small as possible. Based on the above situation, if the electric rake Road bottom