Research Article
Optimization and Practice for Partition Pressure Relief of Deep Mining Roadway Using Empty-Hole and Deep-Hole Blasting to Weaken Coal
Figure 10
Distribution pattern of coal fracture under different blasting hole spacing.
(a) 2.4 m |
(b) 2.2 m |
(c) 2.0 m |
(d) 1.5 m |