That part of a mine from which the coal has been removed and the space then more or less filled. When all of the coal is removed, the mined out area caves in. When this cave-in occurs, the area is said to have fallen, and the part is then referred to as the gob.
The term applied to that part of the mine from which the coal has been removed and the space more or less filled up with waste. Also, the loose waste in a mine. Also called goaf.
To store underground, as along one side of a working place, the rock and refuse encountered in mining. The material so packed or stored underground. The space left by the extraction of a coal seam into which waste is packed. Also called goaf.
A pile of loose waste, coal and other minerals extracted from a mine that are not marketable. Gob may be left piled in underground workings or at the surface of the mine.