矿井煤炭产品质量数字特征在一定程度上反映矿井煤炭产品质量水平和矿井的管理水平。通过测算矿井的煤炭发热量(灰分)的极小值、极大值、全距、均值、标准差，对比数字特征规律性及演变趋势，有利于制定煤炭考核质量指标，控制质量变化趋势。%Digital features of coal product quality in mine reflect the quality level of coal product quality and management level of mine. It is conductive to build the quality index of coal examination and control the quality changing trend through measuring and calculating the minima, maxima, the entire margin, means, standard deviation of calorific value of mine and comparing figures characteristic regularity and development trends.
展开▼
