a. To remove rock from the roof or floor of an opening to increase the height of working (coal mines). See also: brushing b. In a coal mine, a road through the goaf, gob, or worked-out areas packed with waste. CTD c. To clean up fine coal from the floor. CTD d. Forest of Dean. A rich brown hematite. e. Mixed load of large and small coal into a colliery tub. Pryor, 3 f. Mid. To mix gas with air in a mine by buffeting it with a jacket. g. To rip; to enlarge. h. To remove bisque in a definite pattern by means of a brush. See also: bolt-hole brush Source: Dictionary of Mining, Mineral, and Related Terms
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