Abstract:
For the situation of tense excavation replacement in Zhaizhen Coal Mine, in order to enhance advance rate of anchoring and shotcreting roadway, through optimizing the original blasting method, we propose a new blasting method named "bicirculating blasting method", which breaks the traditional concept of a crop of gun of each class in traditional method. Compared with existing methods, the utilization rate of blasting hole can reach over 95%, the tunneling footage has been enhanced 0.6 m per shift, which could play an important role to construct the high production and high efficient mine and to improve the economic benefit.