煤炭采样指南——煤层采样的指导原则

[中文适用范围]： 本文件提供了从地面的煤层获取样品的方法指导，这些煤层可以来自勘探区域或矿山租赁地，也可以来自正在运营的地底或露天煤矿。 [外文原描述]： This document provides guidance on methods for taking samples from coal seams in the ground, whether from exploration areas or tenements, or from operating underground or open-cut mines. The following methods are described: a) sampling of small- or large-diameter holes; b) drill cuttings sampling; c) open-cut slot sampling; d) adit, drift or shaft sampling; e) pillar sampling; f) channel sampling; g) strip sampling. This document does not apply to sampling from moving streams in production or any other source of coal that is not in situ. Recommendations are made for selection and preparation of the sampling site, and methods are described for taking both small and bulk samples and for preparing the samples for transport. NOTE Annex A gives an example of a channel sample record form that can be used to record sampling and other relevant data, and ISO 13909 and ISO 18283 describe how to determine the mass of a representative sample at various nominal top sizes.