loess and soft surrounding rock road tunnel

Soft soft rock

Soft Surrounding Rock

soft surrounding rock masses

horizontal layered surrounding rock masses

allowable deformation of soft rock

argillaceous soft rock

Broken 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

hard rock interbedded with soft rock

high soft rock consideredtobe slope

high strees soft rock