Associating with fracture mechanics, damage mechanics and damage mechanics of rock mass, many experts studied the stability of jointed rock mass by using discrete medium model and continuum model. But there are a few researches to study the effect of random fracture to the stability of jointed rock mass, because of the limits of the 3D fracture network simulation technique. Because shape and distributing fashion of joints, as well as the mechanics character of joints, restrict and control directly the...