Abstract: Drilling and blasting method is a major construction method in tunnel excavation. Blasting excavation will inevitably produce vibration disturbance on the surrounding rock. Based on the project of new Zoumagang tunnel passing through upon Dong-Shen water supply tunnel, blasting vibration control technology is studied. In order to ensure safety of the existing tunnel, the new tunnel blasting construction should be strictly controlled. Construction section is selected which is consistent with the lithological character of the cross-section. Blasting vibration is monitored and vibration law is got under field conditions of the construction. Sadovski formula of peak particle velocity (PPV) for Zoumagang zone is calculated by regression analysis of the measured data. The maximum cutting dosage, safety distance, range of vibration control and the corresponding blasting plan are formulated according the formula and standard, and are verified by simulation, and are implemented on in-situ construction. The in-situ construction measured results in cross-section show that the vibration velocity control standard and blasting designation proposed satisfy the safety requirements, so as to ensure the excavation safety of the constructing tunnel and existing tunnel. Research work has a higher significance and reference value for similar excavation works and vibration control.

Key words: cross tunnel, blasting vibration, regression analysis, Sadovski formula, vibration velocity, vibration control