Research Article
An Experimental Investigation of the Progressive Failure of Sandstone and Its Energy Evolution Characteristics
Figure 9
Energy evolution characteristics of the sandstone specimens with different H/Ds.
| (a) |
| (b) |
| (c) |
| (d) |
| (e) |
| (f) |
| (a) |
| (b) |
| (c) |
| (d) |
| (e) |
| (f) |