人工矿柱置换缓倾斜薄富矿体矿柱  

Artificial Pillar Substituting the Gently Inclined Thin Rich Ore Pillars

作　　者：郭旺[1] 童阳春[1] 

机构地区：[1]化工部长沙设计研究院,湖南长沙410012

出　　处：《金属矿山》2014年第11期27-30,共4页Metal Mine

摘　　要：随着磷肥需求量的快速增长，提高品位高、质量优的磷矿回收率尤为重要。宜昌某磷矿矿体品位高，属缓倾斜薄矿体，目前房柱法采矿造成的矿柱损失率达25％～30％，为解决损失率过大的问题，提出了采用人工矿柱替代原生矿柱的方案，并经人工矿柱与矿石矿柱的承载能力及安全稳定性对比分析。通过理论计算得出：在设计的人工矿柱尺寸条件下，矿柱均匀分布时，人工矿柱抗压强度为10．08MPa；矿柱交错布置时，人工矿柱的强度参数为14MPa。通过现场实施，结果表明采用混凝土人工矿柱置换矿石矿柱，保证了原生矿柱置换后的采场作业安全，同时大幅提高了矿石的回收率。With the rapid growth in fertilizer demand, it is particularly important to improve the recovery of high grade, and high quality phosphate. Yichang phosphate ore is in high grade, and belongs to the gently inclined thin ore. The current mining method results in the loss rate of ore pillar by 25% to 30%. To solve the problem of excessive loss rate ,the scheme of artificial pillar substituting the original ore pillars is proposed. Based on the comparative analysis on the bearing capacity and stability of artificial pillar and ore pillar, the compressive strength of artificial pillar .under different pillar distribution forms was obtained. The on-site implementation indicated that the scheme of artificial concrete pillar substituting the ore pillar ensured se- curity of the stope after replacement, and significantly improved the recovery rate of the ore.

关 键 词：人工矿柱 结构尺寸 矿柱强度 矿石回收率 

分 类 号：TD863[矿业工程—金属矿开采]