Soft soft rock

Broken rock element

Broken rock mass

bulking deformation of rock broken

confined broken rock

rock broken mechanism

size characteristic of broken rock

Soft Broken Seam

the supporting theory of broken rock zone

allowable deformation of soft rock

argillaceous soft rock

Combined Soft Rock

dilatable soft rock

drift in soft rock

dynamic pressure and soft rock complex roadway

Expansible soft rock

expansive soft rock

extreme soft rock

Extremely soft rock