某矿分段空场嗣后胶结充填底柱置换方法研究

某铜矿在回采过程中留有大量顶底柱,为安全回收顶底柱中的高品位矿石,减小损失,采用分段空场嗣后胶结充填采矿法,并以高强度充填体置换底柱,铺设人工假底作为下中段的人工假顶。结合矿山生产条件,展开了底柱置换方法研究,确定出了置换空间形成的方法和参数。通过理论计算出了钢筋混凝土的配筋,并提出了具体的钢筋铺设工序。该方法已被矿山成功应用,可为同类矿山借鉴。

Study on the Method of the Sill Pillar Replacement by Sublevel Open Stoping with Backfilling Method

A large number of top and bottom pillars were left in the stoping process of a copper mine.Sublevel open stoping with backfilling method was used to recover high quality ore that remained in the top and bottom pillars safely and reduce the loss.The sill pillar was replaced by the backfill body with high strength,and the artificial bottom was laid as the roof of the next stage.Based on the condition of mine production,the study on the method of sill pillar replacement was carried out to determine the means and parameters in the formation of the replacement space.The reinforcement of the concrete was calculated in theory,and the specific laying process of the rebar was put forward.The method had been successfully applied in the mine,and can be used as reference for similar mines.