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In order to realize the fast excavation in hard rock roadway with large footage, according to experience and parallel hole cut blasting theory, a diamond central interval charging parallel hole cut blasting experiment scheme was designed, and a series of test was finished in Beishan test site. But through the measurement and evaluation of the test results, it is found that the blasting effect is not ideal. Through research and analysis, It is concluded that the spacing between empty hole and blast hole has an important influence on cut blasting effect, drilling quality will seriously affect the cut blasting effect and a good hole blocking and reasonable jam length play an important role to improve cut blasting effect.

The analysis of improving effect of parallel hole cut blasting on the basis of test results