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在我国,开采急倾斜薄矿脉主要是用留矿法。这种采矿法的最大优点是采准系统和回采工艺简单、效率高、成本低。但主要缺点是矿石贫化大,达到70％～80%;坑木消耗量大,一个采用木材支护顺路天井和用木漏斗放矿的长50米的采场,木材消耗量通常在20米~3以上;矿脉倾角要求不小于60～65度,并且矿石不能有结块性,否则放矿不顺利,甚至有大量矿石放不出来而造成损失。为了解决矿石贫化大的问题,有些矿山,如大吉山钨矿、昼眉坳钨矿等,曾经想用削壁充填采矿法取代一部分留矿法,但试验都失败了。原因是削壁充填采矿法工艺太
In our country, the exploitation of steeply dipping thin veins is mainly by the retention method. The biggest advantage of this mining method is the acquisition system and recovery process is simple, efficient and low cost. However, the major disadvantage is that the ore is depleted to a large extent and reaches 70% to 80%. The consumption of pits is high, and a 50-m-long stope with timber-supported downcomers and mine funnels usually consumes 20 m ~ 3 above; vein dip requirements of not less than 60 ~ 65 degrees, and the ore can not have agglomeration, otherwise the ore is not smooth, and even a large number of ore can not put out and cause damage. In order to solve the problem of large ore depletion, some mines, such as the Dajishan Tungsten Mine and the daymeo tungsten mine, used to want to replace some of the retention methods with wall-cut mining methods, but the tests failed. The reason is that the wall-filling mining process too