Lunan mining company adopted inter-hole millisecond order detonation technology for blasting tests and tested blasting vibration situation by special seismograph in field.

Some key problems such as holes spacing,the size of rockmass over the horizontal holes, the detonating sequence and protective cover against flyingstones were analyzed,and corresponding methods were also put forward.

An example of the application of millisecond multiple-row holes blasting technology in a ground leveling at Huade Petrochemical Co is introduced , and the design of blasting parameters, blasting network, detonating sequence, stemming and safety proofreading are mainly presented.

The test has proved that the split-second blasting and flexible packing lay can not only reduce effectively the damage of remained rockbodies, but also improve the results of blasting.