Assertion: high wall mining | /r/CapableOf | grind long ore surface
Facets:
value: underground
type: LOCATION
Source sentences:
text: Other methods include shrinkage stope mining, which is mining upward, creating a sloping underground room, long wall mining, which is grinding a long ore surface underground, and room and pillar mining, which is removing ore from rooms while leaving pillars in place to support the roof of the room.