有底柱分段崩落法在缓倾斜不稳固厚矿体中的应用

Application of Sublevel Caving with Sill Pillar in Gently Inclined Unstable Thick Ore Body

文章所研究的矿体为缓倾斜不稳固中厚矿体,采用有底柱分段崩落法进行回采,存在安全性差、矿石回收率低、贫化率高等问题。采用预控顶,铺设柔性假顶方法,在覆盖岩石与崩落矿石之间形成一隔离层,从而达到控制矿石贫化的目的。通过工业试验,试验了柔性假顶有底柱分段崩落法在P42-P46线矿体回采中的采场结构、矿块布置、回采工艺等参数,实验结果表明,该采矿方法能有效的解决矿石损失贫化大,采场安全性差等问题。

This paper studied the ore body is in gently inclined unstable thick ore body,have applied sill pillar sublevel caving mining method for extraction,poor safety,low ore recovery rate,high dilution rate and other issues.Adopt the precontrol roof,laying flexible artficial roof,as a result that an isolation layer formed between the overlying rocks and caved rocks,to control ore dilution. Through industrial test,testing stope structure,ore block arrangement,stopping technology and other parameters of the P42 - P46 line of ore mining,using sill pillar sublevel caving with a flexible artficial roof,experimental results show that the mining method can effectively solve the ore high loss and dilution,stope poor safety problems.