Research on Hydraulic Fracturing Technology of Long Boreholes along Strata of High Vast Thick Coal Seam

Figure 8

Characteristics of fracture growth during hydraulic fracturing: (a) Step 1, (b) Step 55, (c) Step 58, (d) Step 63, (e) Step 65, and (f) Step 68.

(a)

(b)

(c)

(d)

(e)

(f)