Research Article

Triaxial Strength Criteria in Mohr Stress Space for Intact Rocks

Table 1

Conventional triaxial compression strengths (MPa).

Rockσ3 and σ1 at failure

RS [15]σ3−3.4602.55101520253035
σ106883.1100.9130.3153.4172.3200.3212.1238.3

TL [16]σ3−3.80510152025303540
σ105288106118137149164176190

LG [16]σ3−130457101214182125303540
σ10226289317337365396426445487528571593637

DD [17]σ302545606585105125
σ1262400487540568620682725

IG [17]σ30204070100150200230
σ12295086928601013116813741497

MT [17]σ301530456075100
σ1100196259302341368437

MA [17]σ3016204070100110130
σ1140349372.5552671806875881

OM [17]σ305204080140200
σ1234339504584.7751.39621107

BS [18]σ30612.52540557085100150200
σ181113130175210246272295324397454

YM [18]σ305102030405060708090100
σ160100122154193221253275310323346361

SL [18]σ30615244672111162195304
σ1293335360381426467518558595709

CM [18]σ30255068.485.5
σ1137234314358404

G [19]σ3032100120150200300400500600
σ123363010301180131013801670213523202650

Q [19]σ30100300400500
σ13271297.5243024802986

B [19]σ30150200300400500550600
σ13491455140014901860202023202340

PGMσ3−1.780510152025
σ10141.68176.86192.2204.31221.7225.8

FGMσ3−2.8260510152025
σ1070.9395.52107.9118.34133.3146.3

MGMσ3−2.1370510152025
σ1065.1794.33119.4131.81143152.4

CGMσ3−1.5680510152025
σ1048.3872.390.0396.52113.2122.5

Removed when fitting a strength envelope in the Mohr stress space.