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A COAL-MINING HISTORY OF OHIO vey geologist and supervisor of the Coal Geology Group. He tells the coal-mining story with the aid of 186 photographs, 27 drawings, and 9 maps, Coal mining - Wikipedia Coal mining is the process of . Longwall systems allow a 60-to-100 percent coal recovery rate when surrounding geology allows their use. Once the coal is . Coal Mining Jobs & Mining Employment - Careermine Coal Search 1000's of active mining jobs including engineering and geology jobs. New jobs daily. Job seekers post your resume for employers to find.    Service Online

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