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Coal Mining Sample

circular 891 glossary of coal classification system,k. mine sample.--a sample of coal collected from a mine, generally from an underground working face or from a strip-wall face. l. run of mine or mine run sample.--generally the same as a tipple sample. m. tipple sample.--a sample of coal collected at a mine tipple. seam.--a bed of coal lying between a roof and floor. this term is not to be used.pdf coal mining methods researchgate,the various methods of mining a coal seam can be classified under two headings, surface. mining and underground mining. 2. 3. methods of extraction. the most economical method of coal ex traction.

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