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- Tasks and activities:
- Mine development
- Document types:
- Reports of Investigations
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12/1/1983 - Reports of InvestigationsMajor problems facing the development of coal and gas resources of the Hartshorne Coalbeds include the complex distribution of minable and unminable coal, high methane content and bed pressure, faulting, variations in degree of dip, presence of natural ...
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1/1/1974 - Reports of InvestigationsThe natural vertical fracture system in bituminous coalbeds is called cleat. Cleat orientation commonly controls the direction of mining with major development paralleling the face cleat. Previous researchers have categorized the origin of cleat as endo...
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Content source: National Institute for Occupational Safety and Health, Mining Program