Numerical Analysis of the Effect of Heterogeneity on Underground Roadway Stability under Dynamic Loads

Table 6

The relative size (percentage of total area) of the local stress reduction region under different dynamic loads.

PPV (m/s)	The relative size of local stress reduction region (%)
	m
	1	3	5	100
0.5	10.2	11.0	3.8	0
1.5	16.5	10.8	5.3	0
2.5	38.6	10.8	16	0