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内蒙红花沟金矿始建于1958年,建矿初期,采用浅孔留矿法开采急倾斜极薄矿脉金矿床.浅孔留矿法的主要优点是工艺简单、便于管理,产量易于控制.但其缺点是矿石损失贫化大,资源利用率低.由于损失贫化较大,致使大量存窿矿石难以放出而残存在采空区内,形成了特有的浅孔留矿法残存“松散矿石体”(以下简称松散矿石体).1979年以后,矿山在改革采矿方法、大幅度降低采矿损失贫化的同时,面对地质资源短缺的现状,为了充分利用黄金资源,对“松散矿石体”的采矿方法进行了探索和实践,总结出了一种适合于急倾斜极薄矿脉”松散矿石体”的采矿方法,即“脉外天井分层切割穿
The Honghuagou gold deposit in Inner Mongolia was originally built in 1958. In the early stage of the construction, the shallow inclined ore deposit was exploited to extract the ultrathin ultrathin ore vein gold deposit.The main advantages of the shallow holdover method are simple process, easy management and easy production control. However, the disadvantage is that ore loss is poor and resource utilization is low, and due to the large loss and depletion, a large number of deposit ore can not be released and remains in the mined-out area, forming a unique “loose ore” Body “(hereinafter referred to as the loose ore bodies.) After 1979, the mining reform in mining methods to substantially reduce mining depletion, the face of the status of the shortage of geological resources, in order to make full use of gold resources,” loose ore body “ Mining method has been explored and practice, summed up a very suitable for very thin vein ”loose ore body" mining method, that is,