某铜矿主矿体采矿方法优化选择研究

Optimization Selection Study on Mining Method for Main Ore-body of A Copper Mine

针对某铜矿主矿体500 m水平西区域复杂难采矿体,提出了进路式上向分层充填采矿法、脉内凿岩出矿巷低分段空场小步距回采嗣后充填法及脉外凿岩出矿巷低分段空场小步距回采嗣后充填法三种可行开采方案,并对三种采矿方案的采场布置、采切工程、回采工艺等进行了详细的介绍。对比分析三种采矿方法的优缺点和技术经济指标,优选出进路式上向水平分层充填采矿法进行开采。该采矿方法回采过程中采用浅孔爆破,能较好地保护上盘不稳定含砂层,工人作业环境安全性高,且其采切比、贫化损失相对较低,出矿品位较高,综合效益明显。

Aiming at the 500 m level complex and difficult mining ore body in the west area of the main ore body of a copper mine, three feasible mining schemes are put forward, which are I. the upward drift layered filling mining method, II. low sublevel, open stopping, and small step back-filling method with inside the ore vein drilling ore drawing roadway, and III. low sublevel open stopping small step back-filling method with outside the ore vein drilling ore drawing roadway. The stope layout, mining and cutting engineering and mining technology of the three mining methods are introduced in detail. Through the comparison of advantages and disadvantages of mining methods and technical-economical indicators, the upward horizontal drift layered filling mining method is selected for mining.This mining method adopts shallow hole blasting in the process of mining, which can better protect the unstable sand-bearing layer on the hanging wall, and the safety of the working environment is high. In addition, the mining cut ratio and dilution loss are relatively lower,and the ore removal grade is high, so the comprehensive benefit is obvious.