注浆固结法在残矿回收中的应用  

Application of grouting consolidation method in the recovery of residual ore

作　　者：时跃宁 魏诚 宫建国 Shi Yuening;Wei Cheng;Gong Jianguo(Hebei Zhongjin Gold Co.,Ltd.;Hebei Jinchangyu Mining Co.,Ltd.)

机构地区：[1]河北中金黄金有限公司 [2]河北金厂峪矿业有限责任公司

出　　处：《黄金》2024年第9期27-30,共4页Gold

摘　　要：针对某黄金老矿山资源衰减问题,为合理利用浅部高品位残矿资源,提出采用预留顶柱和不预留顶柱2种回采方案。预留顶柱分为预留1 m顶柱和0.5 m顶柱;不预留顶柱分为注浆胶结厚度5 m和10 m。根据数值模拟分析结果,确定采用预留部分顶柱与注浆固结干式充填料的综合护顶措施,即预留顶柱厚度1 m,注浆胶结厚度5 m。详细介绍了残矿回收工艺流程。通过对试验采场上部采空区已有松散充填料进行注浆固结,成功回收矿石量4 500 t,金金属量24 kg,获得经济效益661.98万元。该试验的成功经验将指导矿山后续残矿的回收工作。In response to the issue of resource depletion in an old gold mine,this study proposes 2 recovery schemes to effectively utilize shallow high-grade residual ore resources:one with reserved crown pillars and one without.The reserved crown pillar scheme includes options for 1 m and 0.5 m pillars,while the no reserved pillar scheme involves grouting consolidation with thicknesses of 5 m and 10 m.Based on the results of numerical simulations,the joint support method of partial crown pillar reservation and grouting consolidation of dry backfill materials was selected,with a reserved crown pillar thickness of 1 m and grouting consolidation thickness of 5 m.The process flow for residual ore recovery is detailed.By grouting and consolidating the existing loose backfill material in the upper voids of the trial stope,4500 t ores containing 24 kg gold were successfully recovered,yielding an economic benefit of 6.6198 million yuan.The success of this trial will continue to guide future residual ore recovery efforts in the enterprise.

关 键 词：高品位 残矿 松散充填料 注浆 固结法 顶板 数值模拟 

分 类 号：TD853.34[矿业工程—金属矿开采]