Cylindrical Caved Space Stability Analysis for Extension Prediction of Mining-Induced Surface Subsidence

Figure 2

Coordinates’ transformation from in situ stress (, , ) into the local stress at surrounding intact rocks (, , , , , ) in polar system (, , ). (a) Three-dimension (3D) view of the caved space. (b) Local stress at the surrounding rocks in the cross section of caved space. (c) An element illustrating the local stress at surrounding rocks.