01. TECHNICAL CHARACTERISTICS OF COAL AND THEIR RELATIONSHIP WITH ORIGINAL CONDITION OF SOME COAL MINE IN NORTHEASTERN AREA, VIETNAM

Tóm tắt

This paper presents some statistical results of calculating the correlation coefficient of technical characteristics including content of gross calorific value, volatile matter, moisture, ash and sulfur among the coal mines of Na Duong (Lang Son), Ho Thien (Dong Trieu - QN); Khanh Hoa (Thai Nguyen); Thung Than (Nam Mau - QN); Mong Duong (Cam Pha - QN); Uong Thuong (Uong Bi - QN). The analytical results show that the correlation coefficient of technical characteristics of coals from various coal mines is not high. The correlation coefficient of gross calorific value R² is 0,83; the correlation coefficient of volatile matter R²is 0,50; the correlation coefficient of moisture R² is 0,17; the correlation coefficient of ash R² is 0,69 and the correlation coefficient of sulfur iR² is 0,91. The value of the physical characteristics of coal at each coal mine clearly reflects the original conditions of ancient geography, biochemistry and tectonic activity of the Earth's crust.