缓倾斜极薄矿体采矿方法优化方案

摘要

提高缓倾斜极薄矿体的回采效率一直是有待采矿界解决的重大难题。按照常规削壁充填法进行矿体回采的效率低，损失贫化率大，尤其是溜矿系统的布置更是缓倾斜极薄矿体无法有效解决的问题。针对上述问题，对削壁充填采矿法进行了优化。利用溜槽代替溜井下放矿石，溜槽两侧采用毛石砌墙，使人员能够进入溜井处理堵塞现象，从而提高了回采效率。在崩落毛石基础上，利用胶结尾砂进行充填作业，打上一层胶结面，不仅降低了贫化损失率，而且大大提高了矿石回采效率。这些优化措施在焦家金矿望儿山分矿进行推广应用，给矿山带来了良好的经济效益。%It is remain an enormous and difficult problem to improve the efficiency of stoping the gentle dip and filminess ore body.If the resuming fill is applied to stope ore body according to the conventional rules,it will lead to lower efficiency and higher loss impoverishment rate,especially,the slip of mine system arrangement can not effectively solve the problem for gentle dip and filminess ore body.Aiming at the problem above,thus the resuming-fill mining method is optimized.Using the chute instead of sneaking underground ore,both sides of the chute with rubble wall,all of which can make the staff enter the chute to solve the blocking phenomenon,additionally,it improves the mining efficiency.Making use of cemented backfilling materials filling in caving on the basis of rubble,and playing a layer with enough strength of cementation plane can not only reduce the dilution loss rate,but also greatly improve the efficiency of ore mining.These optimization measures have been widely applied in Wangershan sub-ore of Jiaojia gold mine, which has brought good economic benefit for the mine.