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(一)概况 宜春钽铌矿为山坡露天矿,规模1500吨/日。矿石为钠长石化和锂云母化花岗岩,f=8～12,矿石最大块度500毫米,后改为800毫米。采用汽车、溜井平峒运输方式,汽车运距2.5公里左右。溜井深290米、直径2.5米,贮矿段直径4.5米,底部装设双溜口风动指状闸门。 矿山于1970年设计,属三边建设,设计中对粉矿等问题认识不足。最终地质报告提出原矿含泥量10～16％(小于0.074毫米),实际为40％左右(小于2.3毫米),且粘结性较强,透水性差。设计确定大块率10％,实际生产中50％以上。
(A) Overview Yichun tantalum and niobium ore for hillside open pit, the scale of 1,500 tons / day. The ore is sodium feldspar and lithium micaceous granite, f = 8 ~ 12, the largest lump ore 500 mm, later changed to 800 mm. Using cars, smoothing 溜 transport mode, about 2.5 kilometers away from the car. Sliding well 290 meters deep, 2.5 meters in diameter, storage and mining section diameter of 4.5 meters, the bottom of the installation of double slippery mouth pneumatic finger gate. The mine was designed in 1970 and belongs to the trilateral construction. There is not enough understanding on the problems of powder ore in the design. The final geological report proposed that the content of ore mud should be 10-16% (less than 0.074mm), actually about 40% (less than 2.3mm), and strong adhesion and poor water permeability. Design to determine the bulk rate of 10%, the actual production of more than 50%.