Instability Mechanism of Extraction Structure in Whole Life Cycle in Block Caving Mine

Figure 10

Evolution characteristic contour of the horizontal displacement in the cutting plane of the extraction structure: (a) after the formation of the extraction structure, (b) after excavation of the first undercut unit, (c) after excavation of the second undercut unit, (d) after excavation of the third undercut unit, (e) after initial caving, (f) after excavation of the fourth undercut unit and second caving unit, and (g) after excavation of the fifth undercut unit and third caving unit.

(a)

(b)

(c)

(d)

(e)

(f)

(g)