The results show that under static or quasi-static loading the fractal dimension DF is nearly a constant, but under dynamic(impact)loading the DF obviously increases with the loading rates.
结果表明，在静态或准静态加载条件下的断裂面分维数近似为一个常数，但在动态（冲击）加载时，分维数随着加载率的增加而明显增加。
Two cases of loading types were adopted: one was biaxial proportional dynamic loading and the other was axial dynamic loading with one-side constant confining pressure.
试验中采用两种加载方式：一种为不同应变速率下的双向比例加载，另一种为保持一向恒定侧压下的动态压缩试验。
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