In the jointed fractured rock mass, the instability of tunnel is always because the blocks slipalong the joint surface.
在节理破碎岩体中,隧道的失稳破坏往往是由于岩块沿节理面的剪切滑移造成的。
2
Two intersecting faults promote and restrain each other during deformation. One fault may make the other be locked for strain accumulation and may trigger slipalong it.