Based on the test data of clean coal of Penghu Coal Mine,the correlation of ash and gross calorific value was discussed,and the empirical formula was educed in this paper.

• 以坪湖煤矿洗精煤煤质化验结果为依据,探讨了该矿精煤灰分和高位发热量之间的相关关系,并得出其经验公式。