角砾岩型矿体中深孔回采矿柱工业试验研究

COMMERCIAL TESTS FOR RECOVERY OF ORE PILLARS IN A BRECCIA-TYPE DEPOSIT BY MINING METHOD WITH MEDIUM-LENGTH HOLES

为解决河南省某金矿区角砾岩型厚大矿体采矿方法及矿柱回收问题,在2#角砾岩矿体进行了中深孔采矿工业试验,两次爆破成功,落矿2 86万t。试验结果表明,采矿效率成倍提高,采场回采周期明显缩短,减少了资金积压,经济效益显著。中深孔采矿不失为回采低品位、大规模的角砾岩矿体的一种高效采矿方法。

In order to tackle the problems of recovering ore pillars in a large breccia deposit, commercial tests for mining method with medium-length holes were carried out in breccia deposit No 2. Two blasts were successful and ore volume of 28600 tons was broken. The testing results show that mining efficiency is greatly improved and mining period is markedly shortened, thus reducing the overstocked funds and gaining obvious economic benefit. The mining method with medium-length holes is a high-effective method for mining of large breccia deposits with low-grade ore.