To analyze the main methods to evaluate the safety of tunnel blasting near the existing line.The blasting vibration velocity evaluation method and engineering analogy method are adopted.The blasting test and vibration monitoring were carried out to obtain the relevant parameters.By curve fitting,the relationship between blasting vibration velocity,blasting distance and maximum single charge is obtained.To calculate the vibration ve-locity under the most unfavorable conditions and compare the safety limits can be used to evaluate the safety of blasting construction.It is proved that the method is simple and feasible,and the result is reliable by engineering examples.
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