Face A vertical wall of a drive in the direction which the mine is heading. Fault A natural discontinuity in a geological structure (or volume of rock). Fill Waste material (rock) used to fill excavated holes/areas. Floor 1) Ground in an underground area. Floor 2) (Coal Floor) The ground below a coal seam.
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In coal mining this is the intended basis for roof bolting. Bearing — A surveying term used to designate direction. The bearing of a line is the acute horizontal angle between the meridian and the line. The meridian is an established line of reference. Azimuths are angles measured clockwise from any meridian.
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