缓倾斜厚大磷矿体开采方案技术优化

Technical Optimization of Mining Scheme for Gently Inclined Massive Phosphate Ore Bodies

本文以某磷矿为背景,详细介绍了锚杆锚索联合护顶分层切顶房柱嗣后充填采矿法的盘区布置形式、回采顺序、采准切割和回采工艺。生产实践表明,该采矿方法较原设计方案,生产能力大,采切工程量少,自动化程度高,安全系数高,矿石损失贫化率低,便于分采,能较好的满足矿山安全生产的需求。旨在为同类矿山开采提供经验。

A phosphate ore body belonging to a state company in Yichang has an average thickness of 17.71 m and an average dip angle of 14.22°,which is a gently inclined massive phosphate ore body,with a loose structure of the ore bed and the roof,developed joints and poor stability;there are many dangerous rock bodies on the surface,which do not allow surface collapse;multiple poor and rich ore beds are distributed alternatively,which is not conducive to the classification and utilization of poor and rich ores.Overall,conventional mining is difficult.This paper describes in detail the panel layout,stoping sequence,secondary development and stoping process with room&pillar cut-and-fill method with subsequent filling under bolt and cable supporting roof and sublevel cutting roof.Production practice shows that this mining method has a larger production capacity than the original design,less secondary development quantity,high degree of automation,high safety factor,low ore loss and dilution rate,allowing for easy sectional mining,which can better meet the needs of mine production safety.The aim is to provide experience for the development of other similar mines.