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用胶结充填法开采矿床的优点是矿石回采率高。但由于混入部分围岩或充填料落入矿石中都将产生有用矿物的贫化。在回采第一批矿房时,贫化率是由围岩造成的,在这种情况下其贫化率可用普通方法确定。当混入围岩时铁的含量为20—40%。在回采充填体间的第二批矿房时,贫化率主要是由充填料落入造成的,该充填料由砂子和粘合料
The advantage of mining deposits using the cementing method is that the ore recovery rate is high. However, due to the mixing of part of the surrounding rock or filling material into the ore will have depleted useful minerals. When recovering the first mines, the rate of depletion is caused by the surrounding rock, in which case the rate of depletion can be determined by ordinary methods. When mixed with rock when the iron content of 20-40%. During the recovery of the second batch of mills between backfill bodies, the depletion rate is mainly due to the fall-in of the filling material consisting of sand and binder