煤炭采样重要理论问题的分析

考虑煤质的序列相关性，应用方差理论和煤炭采样基础公式，对煤炭采样重要理论问题进行了分析和定量关系的推导，给出了明确的结论以指导煤炭采样实践，补充和完善了煤炭采样理论。这些问题包括：采样单元煤量/煤种不同时批煤采样精密度的估算，不同煤量下初级子样方差的估算，煤量对采样精密度的影响，批煤总子样数不变时采样单元对采样精密度的影响，同种煤不同采样精密度下子样数的变化，双份采样时子样数对采样精密度的影响，多份法采样时采样精密度的估算等。

Analysis of main theoretical problems on coal sampling

Based on variance theory and coal sampling basic formula，this paper analyzed main theoretical problems on coal sampling and derived their relationships quantitatively.In addition，the paper provides a clear guidance to coal sampling practice，which complements and enriches the coal sampling theory.The problems discussed include：lot precision estimation for sub lots with the unequal mass，primary increment variance estimation under different mass of lots，coal mass on the influence of the sampling precision，the influence of the number of sub lots on the sampling precision under the condition of constant number of increments taken from a lot，the relationship of the sampling precision with increment numbers for the same coal，increment numbers on the influence of the sampling precision for duplicate sampling，and the estimation of sampling precision for replicate sampling，etc.