房采采空区
Gob Left by Room and Pillar Mining
采空区
mined zone
Coal mine gap
Stopes
mined-out areas
Mined-out stope
emptied stopes
abandoned stope
mine goaf
finished stope
mined area
mined gob
stoped area
mined region
stoped out area
mined out area
coal mine gob
mined out space
mined up panel
underground mined caves
coal mined area
mine out area
stoped out workings
mined out region
coal mine goaf
Empty mine area
mined - out area (gob
excavated region in coal mine
mining out area
gobi area
waste cave
Hollow out Section
abandoned workings
Waste area
gob
Mind-out Area
GOAF
gob area
Goal
Mining-out region
mined-out area
geologic subsidence
goaf area
Mined-area
Stope
Mining area
Worked-out section
Mined-out Region
emptied area
excavated-empty area
mining exvacations area
ground electricity cross section image
Worked out zone
integrated geophysical exploration
Cavity
mining goaf area
gwag
Mining-out Area
guag
Mine-out Area
Excavation area
vacant place
excavated-empty-area
mining cavities
working out area
empty area
exhausted area
mining caves
work-out area
Reconnaissance
abandoned coal area
Ined-out area
Waste
underground goaf
empty mining area
worked-out area
Mined-out Zone
coal-goaf
golf
Cavities
采空区边坡
The Slopes of Empty Mine Area
采空区残煤
liptobiolite coal in goaf
采空区处理
gob treatment
Mined-out area disposal
goaf management
Mined-out area treatment
Abandoned stope treatment
goaf disposal
disposal of emptied stope
采空区地面塌陷
picks depletion region fall of ground