空场法转崩落法开采时的矿柱回采及覆盖层形成技术  

Pillar Recovery and Covering Layer Formation Technique During Transferring from Open Stope into Caving Method

作　　者：孙国权[1,2] 付占宇 孙江先 胡杏保[1,2] 

机构地区：[1]中钢集团马鞍山矿山研究院有限公司 [2]金属矿山安全与健康国家重点实验室 [3]紫金天欧矿业有限公司

出　　处：《金属矿山》2011年第1期5-7,11,共4页Metal Mine

基　　金："十一五"国家科技支撑计划项目(编号:2006BAB02A03)

摘　　要：针对空场法转崩落法开采矿山需要解决的关键问题——开采衔接、矿柱回采与覆盖垫层形成方式,采用数值模拟分析了下告铁矿单采场最大安全暴露面积和应力分布规律,制定了分区、分次采用超长水平深孔,以排距3～4 m,孔底距4.5 m的爆破参数在下盘进行顶柱回采及强制放顶的回采工艺,实现了空场转崩落开采的高效顺利衔接。In view of the key issues to be solved during transition from open stope into caving mining method-mining bridging, pillar recovery and covering layer formation, the numerical simulation was adopted to analyze the maximum safety exposed area and stress distribution rule of a single stope in Xiagao iron ore. Then, the mining recovery process for top pillar mining and forced carving of the lower ore-body by level deep hole with the blasting parameters of line space of 3~ 4 m, and hole bottom space of 4.5 m in different divisions or partitions is drawn up. Then a smooth and efficient transition from open stope into caving method has been achieved.

关 键 词：空场法转崩落法 矿柱回采 采空区 覆盖垫层 围岩稳定 

分 类 号：TD325.4[矿业工程—矿井建设]