Research Article

Comparative Study on Mineral-Scale Microcrack Propagation of Shale under Different Loading Methods

Figure 7

The initiation and evolution of en echelon intermittent fractures under six different loading methods. Every loading method is shown with five figures that demonstrate the growth of en echelon intermittent fractures over time.
(a)
(b)
(c)
(d)
(e)
(f)