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一、倾斜簿矿脉采场出矿存在的问题 用浅眼崩矿普通留矿法开采倾斜薄矿脉矿体,实践证明存在着出矿困难的实际问题。盘古山钨矿中北组矿脉多为倾角40°～50°的倾斜薄矿脉,局部地段矿脉倾角只有30°左右,因用普通留矿法开采,采场底板倾角在40°上下,矿山现场测定,矿石静止角为52°～54°,因此处于矿石静止角以上的大部分矿石可以借自重自溜放出采场,然而由于采场底板不平整和采下矿石含水胶结以及不
First, the slope of the mine bed mining out the existing problems With the shallow-crushed ore mining ordinary slope mining thin slalom ore body, the practice proved that there is a real problem of mining difficulties. Most of the North Central Group veins in Pangushan Tungsten Mine are mostly inclined thin veins with dip angle of 40 ° ~ 50 °. The veins of partial veins have a dip angle of only about 30 °. Due to mining with ordinary ore retention method, the slab angle of stope is at 40 °, , The angle of repose of the ore is 52 ° ~ 54 °, so most of the ore above the angle of repose of the ore can be released by self-weight self-winding stope. However, due to uneven floor of mining stope,