关于粒度小于3mm煤样化验允许差的探讨

Discussion on the tolerance 1 in coal test when the particle size was smaller than 3mm

针对目前国家现行标准对粒度小于3mm煤样允许差规定的空白,采用适当的数理统计工具对该状态煤样可能的允许差进行分析确定,并指出在样品制备的后期缩分及将3mm煤样进一步加工成一般分析试验煤样的过程中,应注意避免分样不均匀的现象发生。

Regarding to the blank space specified by current national standard for the tolerance1 in coal test when the particle size was smaller than 3 mm, this paper adopted suitable mathematical statistics tools to analyze the possible tolerancel when the particle size was smaller than 3 mm, moreover, it was also indicated that in the process of late stage reduction of sample preparation and making the 3 mm coal sample become general test coal samples, the inhomogeneous division of samples should be avoided