软破矿体分段崩落法覆盖层形成及放矿控制技术实践  

The Technical Practice on Ore-drawing Control and Covering Layer of Soft and Broken Orebody Mined by Sublevel Caving Method

作　　者：刘志华[1] 盛佳[2,3] 李向东[2,3] 张友轩[2] 魏文阁 

机构地区：[1]吉林海沟黄金矿业有限责任公司,吉林安图县133611 [2]长沙矿山研究院有限责任公司,湖南长沙410012 [3]国家金属采矿工程技术研究中心,湖南长沙410012 [4]陕西久盛矿业投资管理有限公司,陕西镇安县711503

出　　处：《矿业研究与开发》2016年第5期32-36,共5页Mining Research and Development

基　　金：国家科技部转制科研院所创新能力专项资金项目(2014EG215027);"十二五"国家科技支撑计划项目(2013BAB02B00)

摘　　要：针对某大型岩金矿山软破矿体分段崩落法采场上覆虚碴条件下的放矿问题,研发了诱导冒落与预留矿石垫层联合覆盖层形成技术,分段组合放矿控制与矿岩接触面呈台阶放矿技术,编制了放矿控制图表,并从现场出矿、出矿口品位控制与出矿顺序及工艺控制的角度强化现场放矿管理,矿山试验矿块取得了贫化率23.18%、损失率23.55%的较优技术指标,实现了软破矿体分段崩落法的安全经济开采。Sublevel caving method was used to exploit the soft and broken orebody in a large gold mine.Aimed at the oredrawing problem of overlying slag in stope,induced caving and reserving ore cushion combining with layer forming technology,multi-sublevel ore-drawing control,and oredrawing technology under the condition of contact face between caved ore and waste presenting step were studied.And the ore-drawing control chart was complied.Therefore,the ore-drawing management was strengthened from the aspect of on-site ore drawing,grade control in ore path,ore-drawing order and process control.After experiments of block,the better technology indexes with dilution rate of 23.18%and loss rate of 23.55% were obtained,which realized the safe and economical mining of sublevel caving method for the soft and broken orebody.

关 键 词：分段崩落法 覆盖层 软破矿体 放矿控制 

分 类 号：TD853.362[矿业工程—金属矿开采]