VARIATION OF THE INTRINSIC ROCK PROPERTIES ON HOEK-BROWN FAILURE CRITERION PARAMETERS

The Hoek-Brown (H-B) criterion is one of the most commonly used rock failure criteria in recent years. This includes a constant parameter called mi which fundamental for estimating strength. Due to importance H-B criterion, it necessary conduct comprehensive studies on various aspects effect this behavior rocks. Therefore, study, using numerical simulation Triaxial Compressive Strength (TCS) tests PFC-2D code, effects microscopic properties different rocks have been studied. Based results was found that micro-parameters can be depending type rock, however has an inverse relationship bond tensile strength and fraction Also, increases with increase friction coefficient, angle, particle contact modulus, stiffness ratio