有色金属和贵金属矿床的特点是埋藏条件极其复杂多变,难以开采.围岩接触区有构造破坏,矿体的裂隙发育和有很高的应力等,严重地影响着暴露面的稳固性,并能引起围岩剥落,致使矿石贫化.这将会给采矿企业带来很大损失.用垂直盘区和天井崩矿采矿法开采柯楔卡尔斯克急倾斜薄矿脉过程中矿石的二次贫化率很高.据南乌拉尔黄金公司的资料,矿石贫化率从15%到20%.矿脉厚度为0.2—1米,埋藏在裂隙较发育的斜长花岗岩和变质的黑云母闪长岩之中.后者的稳固性比斜长花岗岩差得多,通常分布在与矿体接触的上 Non-ferrous metal and precious metal deposits are characterized by extremely complex and variable burial conditions, which are difficult to mine, with tectonic damage in the contact area of ​​the surrounding rock, development of fractures in the ore body, and high stress, which seriously affect the stability of the exposed surface Can lead to the spalling of the surrounding rock, resulting in the depletion of the ore, which will bring huge losses to the mining enterprises. Secondary depletion of the ore during the mining of the Kellogg Karsch steeply inclined thin veins with the vertical panel and the roof collapse mining method According to the information from South Ural Gold Company, the ore depletion rate ranges from 15% to 20%. The veins are 0.2-1 m thick and are buried in the more developed plagiogranite and metamorphic biotite diorite The latter is much less stable than plagiogranite and is usually found in contact with the ore body