不稳固缓倾斜薄至中厚矿体上向进路充填采矿法

Upward drift filling mining method for unstable and gently inclined thin to medium thick ore body

针对不稳固缓倾斜薄至中厚矿体开采技术难题,通过调研类似矿体采矿方法,确定采用上向进路充填采矿法,采取二期进路分层交叉接顶压顶和先期导硐后期扩压回采工艺,采用土工布钢骨架式柔性透水式充填挡墙。通过工业试验,上向进路充填采矿法采矿贫化率≤4.3%,采矿损失率≤3.7%,进路生产能力≥105 t/d,取得了良好的技术经济指标,适用于赋存形态复杂的不稳固缓倾斜薄至中厚矿体。

In view of the technical problems of mining unstable and gently inclined thin to medium thick ore body,the upward drift filling mining method was determined through the investigation of mining methods of this kind of ore body.In this method,the second stage approach was adopted to connect the roof with the top pressure in layers and to expand the pressure in the later stage of the pilot tunnel,and the geotextile steel skeleton flexible permeable filling retaining wall was adopted.Through the industrial test,the dilution rate of upward drift filling mining method was≤4.3%,the mining loss rate was≤3.7%,and the drift production capacity was≥105 t/d.Good technical and economic indexes have been obtained,which can solve the mining problem of unstable and gently inclined thin to medium thick ore body with complex occurrence.