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经过30多年的开采,东风矿井下铅锌矿资源已近枯竭。为了延长生产周期,矿里开始寻找接续资源。而那些生产坑口浅孔留矿法空区中间残留的矿柱和周边的残矿柱、矿壁资源很自然就落入人们的视线。回采可以,但必须坚持“安全第一”的原则,在搞清采空区的整体稳定性、矿柱受力状态及矿柱对空区稳定的作用大小后,方能考虑开采。针对14号空区稳定性的测算分析如下。
After more than 30 years of mining, the resources of lead-zinc mine in Dongfeng Mine have almost dried up. In order to extend the production cycle, the mine began to find alternative resources. And those who produce the pit hole hole left airspace in the middle of the residual ore column and the surrounding residual ore column, mine wall resources naturally fall into people’s attention. Mining can, but must adhere to the “safety first” principle, to find out the overall stability of the mined-out area, the pillars of the state of force and the pillars of the role of the stability of the size of the open area before they can consider mining. The calculation and analysis of the stability of the No. 14 space are as follows.