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金、锡、钨、锌、铅等有色金属矿床一般属于地质构造复杂和极复杂的矿床,其特点是矿体厚度和内部构造变化大,矿石质量和矿物成分变化多,而且主要成分的分布往往又极不均匀。这些矿床一般属第3和第4类复杂矿床。设计时,对于第3类复杂性矿床取表内矿量C_1级(探明储量)与C_2级(预估储量)的比例为4:1,而对第4类复杂性矿床取1:1。这就意味着要根据具有概率特性的资料进行矿山企业设计。同时,矿体质量和厚度的变化对开采这些矿床的矿山企业的技术经济指
Non-ferrous metal deposits such as gold, tin, tungsten, zinc and lead generally belong to complex and extremely complex geological deposits characterized by large changes in ore body thickness and internal structure, changes in ore quality and mineral composition, and the distribution of major components are often Very uneven. These deposits are generally of type 3 and 4 complex deposits. At design time, the ratio of C_1 (proven reserves) to C_2 (estimated reserves) on the table for complex type 3 deposits is 4: 1 for mines and 1: 1 for complex 4. This means that mine design should be based on data with probabilistic characteristics. At the same time, changes in the quality and thickness of the mines to the mining of these deposits of technical and economic means