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Previous subbtiminous coal produced by suface mining Next big mechines for gold mining In the past 20 years we devote to producing mining equipments... Coal miningKnow More. Mountaintop coal mining is a surface mining practice involving removal of mountaintops to expose coal seams and disposing of associated mining overburden in adjacent...

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Coal Mining and Production 342 Loads Per Unit of Production* Parameter Surface mining (t/1000t coal produced) Underground mining (t/1000t coal produced) Mining Techniques Contour Area Conventional Longwall Liquid effluents 0.24 1.2 1 1.6 Solid waste 10 10 3 5 Dust 0.1 0.06 0.006 0.01 Source: Based on Edgar, 1983

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