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苏联各云母矿区,倾斜和缓倾斜矿体都为数不多,而开采这些矿体却又有很多困难。目前,根据厚度和倾角的不同,分别采用全面法、房柱法、水平分层充填法和联合采矿法。在薄矿体中,多采用留不规则矿柱的全面采矿法。科夫多尔云母采选公司耶纳矿216号缓倾斜层状矿体的部分矿量是采用这种方法开采的一例。矿体面积为12000米~2,垂直厚度为0.5～20米,由微斜长伟晶花岗岩构成。围岩为石榴石-黑云片麻岩,裂隙
In the Soviet Union, there are only a few inclined and gently inclined ore bodies in each mica mining area, but there are many difficulties in mining these ore bodies. At present, according to the difference of thickness and inclination, comprehensive method, house-column method, horizontal stratified filling method and combined mining method are respectively adopted. In the thin ore body, the use of more irregular ore pillar mining method. Part of the ore volume of gently inclined layered orebodies at No.241, Yevna Mine, Kefuduoer Mica Mining Company is an example of mining by this method. Ore body area of 12000 m ~ 2, the vertical thickness of 0.5 to 20 meters, composed of slightly inclined long pegmatite. Surrounding rock garnet - black micelles gneiss, cracks