Shandal Geological Field Survey System · geologicalfieldsurvey.com
Rock mass classification
Describe the intact rock, the block size and the joint surfaces. The lab rates the rock mass with RMR89, Q and Q-slope, derives GSI, and computes the Hoek–Brown strength, the equivalent Mohr–Coulomb parameters and the deformation modulus.
Classification results
1
Position of the rock mass on the classification scales
2
Hoek–Brown failure envelope and equivalent Mohr–Coulomb fit
3
Shear strength envelope in normal and shear stress
4
Q-slope: steepest stable slope angle
5