loess and soft surrounding rock road tunnel

red-layered soft rock

Soft soft rock

Soft Surrounding Rock

SOFT SURROUNDING ROCK MASS

soft surrounding rock masses

horizontal layered surrounding rock masses

layered surrounding rock

allowable deformation of soft rock

argillaceous soft rock

Broken Soft Rock

Combined Soft Rock

complex soft surrounding-rocks

DEEP SOFT ROCK

DEEP SOFT ROCK ROADWAY

DEEP SOFT ROCK TUNNEL

deep soft-rock roadway

deformation of the soft rock around tunne ls

dilatable soft rock