Fractal Statistical Study on the Strength of Jointed Rock Mass

The failure probability and strength of jointed fractured rock mass under water pressure action place important constraints on the safety stability engineering. In this study, two calculation models for joint rupture shear slip are established according to different relative sizes working conditions, effects fractal dimension, pressure, number cracks analyzed. most unfavorable dip angle shear-slip conditions is calculated. proposed accurately reflect mass, methods should be selected specific conditions. effect sensitive mode. Reasonable drainage carried out modes when constructing tunnels with abundant groundwater, certain or plugging construction schemes not necessarily applicable all cases. at which fissures prone given as π/4 + φ/2, where φ parameter. An increase in dimensions, external stress, fractures will enhance regardless Controlled blasting advanced grouting reinforcement measures recommended a tunnel traverses through fissure zone reduce generated surrounding thus improve its stability.