垂直分条采矿工艺在急倾斜薄矿体顶柱回收中的应用  

Application of vertical strip mining process in the recovery of crown pillars in steeply inclined thin ore bodies

作　　者：贾志伟 李赫 章邦琼 魏鹏 Jia Zhiwei;Li He;Zhang Bangqiong;Wei Peng(ZhongJin Gold Corporation Limited;Inner Mongolia Jintao Co.,Ltd.)

机构地区：[1]中金黄金股份有限公司 [2]内蒙古金陶股份有限公司

出　　处：《黄金》2024年第9期23-26,共4页Gold

基　　金：国家重点研发计划项目(2022YFC2905003,2022YFC2905004)。

摘　　要：急倾斜薄矿体在空场采矿法开采后会残留顶柱,由于透采时凿岩工人在逐渐变薄的顶柱下作业,安全风险较高,为避免出现大面积冒顶事故,常留设永久损失的高品位原生矿柱,造成了资源的极大浪费。为安全高效回收顶柱,提出一种垂直分条采矿工艺,详细介绍了该方法的采准切割布置、回采工艺及主要技术经济指标等。现场工业应用表明:采用该方法能够最大限度地回收顶柱,且空顶后暴露面积小,安全性高;台效由原工艺的15.4 t/台班提高至23.3 t/台班,提高了51.3%;采矿损失率由62%降低至5.3%,相比原采矿工艺降低了91.5%,取得了良好的技术经济效果,可在同类型矿山推广。In steeply inclined thin ore bodies,crown pillars left behind after open stoping present significant safety risks during extraction,as drilling workers operate under increasingly thin pillars,leading to a high likelihood of large-area roof collapses.To avoid these risks,high-grade primary ore pillars are often permanently left in place,resulting in significant resource wastage.To safely and efficiently recover these crown pillars,a vertical strip mining process is proposed.This paper provides a detailed explanation of the method s cutting layout for preliminary mining,recovery process,and key technical and economic indicators.Industrial application on-site has shown that this method maximizes the recovery of crown pillars while minimizing the exposed area after roof removal,thereby ensuring high safety.The per-shift for unit machine productivity increased from 15.4 t to 23.3 t,an improvement of 51.3%.The mining loss rate decreased from 62%to 5.3%,a reduction of 91.5%compared to the original mining method,yielding excellent technical and economic results.This process can be promoted in similar mines.

关 键 词：高品位 冒顶 顶柱回采 垂直分条 急倾斜薄矿体 削壁充填采矿法 

分 类 号：TD853.34[矿业工程—金属矿开采]