赋存于软弱围岩下残矿回采方案优选  

Optimization of Residual Ore Mining Scheme under Weak Surrounding Rock

作　　者：原绅师 聂兴信[1] 远洋 孙锋刚[1] 罗小新 娄一博 YUAN Shenshi;NIE Xingxin;YUAN Yang;SUN Fenggang;LUO Xiaoxin;LOU Yibo(School of Resources Engineering,Xi′an University of Architecture and Technology Xi′an 710055,China;Shaanxi Metallurgical Design and Research Institute Co.,Ltd.,Xi′an 710018,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055 [2]陕西冶金设计研究院有限公司,陕西西安710018

出　　处：《金属矿山》2024年第8期10-18,共9页Metal Mine

基　　金：国家自然科学基金项目(编号:5197040521);陕西省重点研发计划工业攻关项目(编号:2023-YBGY-137)。

摘　　要：通过对不同位置的残留锶矿矿体特点的深入分析,针对顶柱采用房柱空场嗣后充填法、间柱采用阶段空场嗣后充填法的方案进行了研究,以确保对稀有金属锶矿的安全高效回采。同时,结合数值计算,进一步优化了残矿回采方案。研究结果表明:采用预留0.5 m厚护顶矿层柱、1 m厚保安矿柱的回采方案,能够有效实现锶矿的安全高效回采;-150~-70 m中段除去护顶矿层后顶柱总可采储量10957 t,除去预留保安矿柱剩余间柱可采储量27930 t;房柱空场嗣后充填法对顶柱进行回采,其回收率约85%,利润约3000万元;阶段空场嗣后充填法对间柱进行回采,其回收率约80%,利润可达7000万元。通过合理配置顶柱和间柱的厚度既确保了矿体的稳定性又提高了回采的效率,极大地提高了经济效益。这一方案在解决软弱围岩下金属矿回采难题方面具有显著的借鉴意义。Through in-depth analysis of the characteristics of residual strontium ore bodies at different locations,the scheme of using room-and-pillar open-field subsequent filling method for the top pillar and using stage open-field subsequent filling method for the middle pillar was studied to ensure the safe and efficient mining of rare metal strontium ore.At the same time,combined with numerical calculation,the residual ore recovery scheme is further optimized.The results show that the safe and efficient mining of strontium ore can be effectively realized by using the mining scheme of reserving 0.5 m thick top-protected pillar and 1 m thick security pillar.The total recoverable reserves of the top pillar after removing the top-protected pillar in the middle section of-150 m to-70 m are 10957 t,and the recoverable reserves of the remaining pillars after removing the reserved security pillar are 27930 t.The recovery rate of the top pillar is about 85%,and the profit is about 30 million yuan.The recovery rate of the pillar is about 80%,and the profit can reach 70 million yuan,a total of about 100 million yuan,which greatly improves the economic benefit.Through the rational allocation of the thickness of the top column and the middle column,the stability of the ore body is ensured and the efficiency of the mining is improved.This scheme has significant reference significance in solving the problem of metal ore mining under weak surrounding rock.

关 键 词：残矿回采 保安矿柱 数值模拟 空区处理 

分 类 号：TD853.391[矿业工程—金属矿开采]