敦德铁矿无底柱分段崩落法后采空区的治理

Treatment of Mined-out Area after Sublevel Caving without Sill Pillar in Dunde Iron Mine

随着矿体开采,形成的采空区容易造成片帮、冒顶、岩爆、冲击地压及空气冲击波、地面塌陷、地面沉降、地裂缝以及由其导致的滑坡、泥石流等多种形式灾害的发生。经过多次方案对比,敦德铁矿采用了最经济又简便安全的采空区封闭的处理方法,选用溜井封堵、斜坡道封堵、巷道封堵三种封堵方案对采空区进行治理。

With the mining of ore body,the goaf formed is prone to the occurrence of many kinds of disasters,such as the slope,roof falling,rock burst,impact ground pressure and air shock wave,ground collapse,ground settlement,ground crack and landslides and debris flow caused by it.After many schemes comparison,the most economical and safe method of goaf closure is adopted in Dunde Iron Mine,and three sealing schemes,namely,chute plugging,ramp sealing and roadway sealing,are adopted to control the goaf.