broken coal and rock mass

broken jointed rock mass

Broken rock element

bulking deformation of rock broken

confined broken rock

rock broken mechanism

size characteristic of broken rock

the supporting theory of broken rock zone

accumulation of rock mass

acidic cor rosion and filtration of rock mass

age of rock mass

anchorage of discontinuous jointed rock mass

Anchored Rock Mass

Anchoring rock mass

ancient rock mass of tension cracked

available rock mass

basic quality index of rock mass

Bearing capacity of rock mass

blasting enhanced permeability in deep rock mass w