Investigation of the Optimization of Unloading Mining Scheme in Large Deep Deposit Based on Vague Set Theory and Its Application

Figure 7

The maximum principal stress distribution cloud diagram of the four schemes (the contour of min. principal stress shown in FLAC code is the max. principal stress). (a) Scheme (I). (b) Scheme II. (c) Scheme III. (d) Scheme IV.

(a)

(b)

(c)

(d)