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步间矿柱,是利用链斗式采金船开采的砂金矿山造成金属损失的主要因素。步间矿柱的形成,由采金船斗链的挖掘特性所确定。一、步间矿柱的特点白水金矿垂直方向金的富集规律见图1,各矿地质资料中,残积碎石层(位于河漫滩堆积物的最下层,直接覆盖在基石之上)所含金属量占混合砂层所含金属量的30～57.1％,而其厚度仅为混合砂层的3.27～14.79％,见表1。
Step pillars, is the use of chain bucket gold mining gold and gold mining gold mine caused the main factor in metal losses. The formation of pillars between steps is determined by the digging characteristics of the bucket chain of gold mining vessels. First, the characteristics of the step pillars Baishui gold vertical gold enrichment rules shown in Figure 1, the geological data, the residual gravel layer (located at the bottom of the river floodplain, directly covered in the cornerstone above) contained The amount of metal accounts for 30 to 57.1% of the amount of metal contained in the mixed sand layer, while the thickness thereof is only 3.27 to 14.79% of that of the mixed sand layer (see Table 1).