傳統的估算節理岩體強度的方法,比如RMR分類、GSI分類等等,是通過評估岩體破碎程度並對完整岩塊的強度進行推算。運用顆粒離散元方法,使用軟件PFC來創建BPM模型能很好的模擬完整岩塊的力學性質。在此基礎之上,對於岩體中存在的節理,可以採用光滑節理模型(SJM)來模擬。光滑節理模型的思路在於改變節理處顆粒與顆粒相互作用的方式,使之不再符合牛頓第二定律的作用,而是沿著節理方向滑動。這種定義方式與節理作用機制相吻合,相對於降低節理處顆粒的膠結強度的方式,更能直觀反映節理存在對岩石力學性能的影響。

The traditional method of estimation of jointed rock mass strength, such as the RMR classification, GSI classification, etc., is extrapolated to assess the degree of rock crushing and calculated with the strength of the intact rock. The use of particle discrete element method, using the software PFC to construct BPM model could have a good simulation of mechanical properties of intact rock. On this basis, the jointed rock mass could be used to smooth joint model (SJM) to simulate. The idea of the smooth joint modelwas to change the way of the motion of particles between joints, so that it no longer meets the role of Newton’s Second Law, but the direction of sliding along the joints. Relative to decrease the bond strength of particles between joints, this definition was consistent with action of joints, the more directly reflect the joints exist on the rock mechanical properties.