缓倾斜极薄矿体后退式抛掷爆破浅孔房柱采矿法的实践

Practice on Retreat casting blast of Shallow Hole Room and Pillar Mining Method for Gentle Dip and Extra-narrow Ore Body

开采缓倾斜极薄矿体一直以来都是国内外的采矿难题。针对云南省大姚县大村矿床缓倾斜矿体极薄赋存条件,从采矿方法上考虑,最主要的问题是如何最大限度的降低损失率、贫化率。因此,在选择采矿方法上,不能局限于某种采矿方法的基本条件的限制。应当从技术及经济的角度优化某种采矿方法,朝着"只采矿层不采废石"的采矿方法考虑问题。在浅孔爆破技术上和采矿方法上优化各种设计参数,以控制采空区高度为目的,才是最正确的做法。

Mining the gentle dip and extra--narrow ore body has been a difficult mining problem at home and abroad. Aimed at the occurrence conditions of a gently inclined orebody in Dachun deposit of Dayao County in Yunnan province, considered from the mining method, the most important problem is how to reduce the loss rate and dilution rate. Therefore, the selection of mining method can＇t merely limit to the basic conditions of mining method, the optimization of the mining method from technical and economic point of view should be considered, ＂mining only ore but no waste rock layer＂ should be considered. Various design parameters in the shallow hole blasting and mining method should be optimized to control the gob height for the purpose.