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近年来地质工作中的采样方法有了显著的进步,例如刻槽采样法的推行对矿床品位的评价有了根本性的保证,但采样法无论如何精确,如果采样长度的代表性、品位计算方法、试样破碎加工、层间夹层处理等方法采用不当时,也会影响采样的精确性.目前在厚层矿床采样长度处理方法上还存在一些问题,如对采样长度不考虑层理与地形关系,一律依自然曲线把2～4公尺当作一个采样单位.而厚层矿床一般是露天开采,在露天开采中往往是拉开水平采矿段,而不是沿自然曲面剥层采矿的.因而自然曲线长度无论是局部的或整体的,均不能代表真正样品长度,从图1可知:
In recent years, the sampling method in geological work has made significant progress. For example, the implementation of notch sampling method has fundamentally guaranteed the evaluation of deposit grade. However, the sampling method is accurate regardless of the representativeness of sample length, , The sample crushing process, interlayer sandwich method used improperly, will also affect the accuracy of sampling.At present, there are still some problems in the method of sampling length of thick deposits, such as sampling length does not consider the relationship between layering and topography , Will be based on the natural curve of 2 to 4 meters as a sampling unit, while thick deposits are generally open pit mining, open pit mining is often open horizontal mining section, rather than along the natural curved surface stripping mining. Whether the length of the curve, either local or global, can not represent the true sample length, we can see from Figure 1: