大洞金矿采矿工艺与采场稳定性分析研究  

Analysis on Mining Technology and Stope Stability of Dadong Gold Mine

作　　者：齐发富 李学锋 宋子贺 李和群 段晓阳 蒋夏施 吴高善 QI Fafu;LI Xuefeng;SONG Zihe;LI Hequn;DUAN Xiaoyang;JIANG Xiashi;WU Gaoshan(College of Resources and Environment,Guangxi University,Nanning,Guangxi 530004,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004

出　　处：《矿业研究与开发》2021年第7期19-24,共6页Mining Research and Development

基　　金：国家自然科学基金资助项目(51964003)。

摘　　要：大洞金矿+65 m以上标高矿体属于急倾斜极薄矿体,该矿体原采用浅孔留矿法开采,安全性差且损失贫化率较高,为保证采场生产安全和提高生产能力,提出采用削壁充填采矿法开采。对矿岩体开展岩石力学参数测试、岩体工程地质条件分析与质量评价,并结合Mathews图解方法对采场、采场顶板、采场上盘围岩稳定性进行分析研究,研究结果表明:大洞金矿石英岩和粉砂质板岩均属于差岩体,采用浅孔留矿法开采矿体无法保证采场上盘围岩的稳定性,而选取削壁充填采矿法作为采矿方案较为合理,该方法安全可靠且预期技术经济效果良好,矿石贫化率下降35%,矿石损失率降低16%。The ore body above +65 m in Dadong gold mine belongs to steeply-inclined extremely-thin ore body. The ore body was originally mined by shallow hole shrinkage method, which has poor safety and high loss and dilution rate. In order to ensure the safety of stope production and to improve the production capacity, the cutting and filling mining method was proposed for mining. Rock mechanics parameter test, as well as rock mass engineering geological condition analysis and quality evaluation were carried out on the rock mass of the mine. Combined with Mathews graphic method, the stability of stope, roof and hanging wall surrounding rock was analyzed and studied. The results show that quartzite and silty slate in Dadong gold mine belong to poor rock mass, and shallow hole shrinkage method can not guarantee the stability of hanging wall surrounding rock. However, the cutting and filling mining method is more reasonable, safe and reliable, and its expected technical and economic effect is good. The ore dilution rate is reduced by 35%, and the ore loss rate is reduced by 16%.

关 键 词：急倾斜极薄矿体 削壁充填采矿法 Mathews图解方法 采场稳定性 

分 类 号：TD863.1[矿业工程—金属矿开采]