Mechanical Mechanism of Water Injection to Enhance the Stability of Soft Coal

Figure 7

Shear stress-displacement curve of extremely soft coal: (a) ; (b) ; (c) ; (d) ; (e) ; (f) ; (g) ; (h) .

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)