Because of the shortcomings of the sub blasting in the roadway driving process, so Xingjing Coal Mine put forward a blasting technology when it is heading for the rock roadway in the extended roadway of the North Lane. Through the analysis and comparison of the experimental results, it shows that the technology of the full section blasting technology is more economical and practical than the sub blasting technology.%由于分次爆破在巷道掘进过程中呈现出诸多缺点,因此新景矿在进行北大巷延伸巷道岩巷的掘进时,提出采用一次爆破技术,通过对试验结果的分析对比,表明一次爆破成型的巷道全断面技术相比分次爆破技术更加经济和实用.
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