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焦家金矿床属第 勘探类型 ,矿山生产勘探实际形成的 B级网度走向×倾斜为 30 m× ( 12～ 2 5) m,C级为 30 m× ( 4 5～ 90 ) m,地质勘探 B及 C级坑探网度相当于矿山生产勘探的 C级。通过对比得出地质勘探阶段圈定的 2号矿体 ,大部分是 1号矿体的分支 ,其余是 3号脉群的小矿脉的上延部分。单独存在的“2号矿体”规模很小。 - 190 m以上 1、 2号矿体生产勘探的 B级储量经采矿验证后 ,矿石量、品位及金属量均下降 ,降幅分别为 13.9%、 1.7%及 15.3% ;由地质勘探C级升为生产勘探 B级后 ,矿体走向长度平均减少 2 3.8% ,厚度平均增加 31.3% ,矿石量增加6.6% ,品位下降 2 5.5% ,金属量下降 17.3%。矿量变化和 3号脉与主矿体的多次复合使矿体的形态改变较大有关。推荐 1号矿体生产勘探的 C级坑探网度为 60 m× ( 60～ 80 ) m,段高 4 0 m。
The Jiaojia gold deposit belongs to the first exploration type. The grade B network scale actually formed by mine production exploration is 30 m × (12 ~ 25) m and 30 m × (45 ~ 90) m, and the geological exploration B and C-level pit exploration network equivalent to mine exploration and production of C-level. By comparison, it can be concluded that the No. 2 ore body delineated in the geological prospecting stage is mostly the branch of No. 1 ore body, and the rest is the extension part of the small veins of No. 3 pulse group. The existence of “No. 2 ore body” is very small. - Class B reserves of No. 1 and No. 2 ore bodies above 190 m have been reduced by 13.9%, 1.7% and 15.3% respectively after being verified by mining. The grade C of geological exploration has risen to After producing exploration grade B, the orebody strike length decreased by an average of 2 3.8%, the average thickness increased by 31.3%, the amount of ore increased by 6.6%, the grade decreased by 2.55% and the amount of metal decreased by 17.3%. The variation of ore amount and the combination of No.3 vein and the main orebody are related to the larger change of ore body morphology. It is recommended that the grade C pit exploration network for exploration and production of No. 1 ore body be 60 m × 60 ~ 80 m and the section height should be 40 m.