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• Respirable dust adhering to run-of-face bituminous coals
• Collection of airborne coal dust by steam
• Novel coal-cutting bits and their wear resistances
• In-mine installation of passive water barriers
• Deposition of respirable coal dust in an airway
• Reduction in frictional ignition due to conical coal-cutting bits
• Control of airborne respirable dust in the face area with water sprays using a full-scale laboratory model