本文依据采金船、水枪开采对混合砂品位指标的使用,参数计算和矿体圈定中指标使用方法存在的问题进行讨论。 一、制定混合砂品位指标的意义和运用指标存在的问题 冲积砂金矿床主要含金层赋存于松散沉积物底部,砂砾层和碎石层上部(即风化基岩),含金率占90％以上,一般规律是越靠近基岩砂金越富集。采金船开采时,从上到 This article discusses the problems existing in the usage of the mixed sand grade index, the calculation of the parameters and the method of using the centering index of the orebody circle according to the gold mining vessel and the water gun. First, the development of mixed sand grade index significance and the use of indicators of the problems alluvial gold deposit main gold layer occurs at the bottom of loose sediments, gravel and crushed stone layer (ie, weathered bedrock), the gold content of 90% Above, the general rule is that the closer the bedrock gold is, the more enriched it is. Mining gold mining, from the top