Research Article

Unloading-Induced Crack Propagation of Two Collinear Unequal Length Flaws in Brittle Rocks

Figure 1

Stress distribution in different parts of a slope before (a) and after (b) excavation and mechanical model of the stress state of the rock mass.
(a) Stress state of rock mass before slope excavation
(b) Stress state of rock mass after slope excavation