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area classification coal grinding in indonesia

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area classification coal grinding in indonesia

200811 The area covered by the coal belt is about 450 km 2 The Jharia coal field is an exclusive storehouse of prime coke coal in the country consisting of 23 large underground and nine large open cast mines Agarwal et al 2006 The mining activities in these coal fields started in 1894 and were intensified in 1925

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