复杂多空区破坏矿体的采矿方法

针对复杂多空区破坏矿体存在的资源难以回收、回采安全性差、回收混岩率偏高等问题,以西石门铁矿多空区矿体开采为依托,在分析原有采矿方法及平底结构不适应性的基础上,考虑顶板围岩的稳定性以及下盘矽卡岩的特点,提出了将矽卡岩作为贫矿开采以及斜进路与平底堑沟结构相结合的回采方案,并针对不同倾角与厚度条件,形成了双堑沟与单堑沟等多种不同的底部结构布置方式,适应了不同的矿体回采需求。此外,对堑沟平底结构方案的特点进行了分析,提出了适宜的配套措施,以保证回采方案的顺利实施。

Mining Method of Ore-body with Multiple Mined-out Areas

In view of some problems in exploitation of ore-body with multiple mined-out areas,such as hard recycling,weak security in mining,and high rock mixing,Xishimen iron mine is adopted as engineering basis to study the exploitation of ore-body with multiple mined-out areas.Based on analysis of inadaptability of original mining methods and flat bottom structure,and considering the stability of roof surrounding rocks and the features of skarns at footwall,a new scheme that combines inclined drift with flat bottom trench structure and treats skarns as low grade ore is proposed.Several different bottom structures layout,such as double trenchs,and single trench,etc,are formed for different dip angle and thickness,which are suitable for recovery of different orebodies.In the end,the characteristics of the flat bottom trench structure is analysed,and an appropriate supporting measure is proposed for ensuring the scheme going on smoothly.