论文部分内容阅读
位于南非黑山碎丘(Broken Hill) 的铅锌银铜多金属矿床、沿走向延长1200多米.矿体由两个扁平状矿体组成,总厚度为5～40米,倾向北北东、倾角30°～50°该矿床矿石品位高、矿体规模较大.已探明的储量为四千万吨.矿体上部倾角约50°,采用深孔留矿法回采.待矿房采完放出矿石后,用适当材料充填空区.然后回采矿柱.采出矿柱后留下的空区也要进行充填.在下部、倾角约30°左右,采用分层充填法进行回采.
The lead-zinc-silver-copper polymetallic deposit at Broken Hill, South Africa, extends more than 1,200 meters along the strike.The ore body consists of two flat ore bodies with a total thickness of 5 to 40 meters, ° ~ 50 ° The ore deposit is of high grade and large orebody size, with proven reserves of 40 million tons. The upper part of the ore body is inclined at about 50 ° and is reclaimed by the deep-hole retention method. After filling the empty area with the appropriate material, the ore column is then returned to the mining column, and the remaining empty area after the mining of the ore column is also filled in. In the lower part, the inclination angle is about 30 °, and the stratified filling method is adopted for the recovery.