爆破振动速度预测安全保证系数的确定

基于爆破振动速度预测公式回归分析的基本原理，提出根据建筑物不同安全等级应选择一定的可靠性指标，并推导了预测爆破振动速度公式中所含安全保证系数的计算过程。为简化计算过程，又进一步提出了基于监测数据量、回归分析相关系数以及可靠性指标的关于安全保证系数计算的经验公式。经过大量监测数据验证了该经验公式的计算精度和可靠性均能满足工程实际需要，从而修正了萨氏公式预测精确度不够的缺陷，可为重要建筑物周边的安全爆破设计提供参考。

Determination of safety coefficient for predicting blasting vibration velocity

The basic principle of regression analysis was considered for the prediction formula of blasting vibration velocity. On the basis of the considered principle, an opinion was put forward that certain reliability indexes should be chosen according to the safety levels of buildings. And the calculation process was deduced for the safety assurance coefficient included in the prediction formula of blasting vibration velocity. To simplify the calculation process, an empirical calculation formula was proposed for the safety assurance coefficient based on the parameters consisting of amount of monitoring data, correlation coefficient of regression analysis, and reliability index. The accuracy and reliability of the empirical calculation formula was verified by the monitoring data in actual projects. The investigated results show that the empirical calculation formula can meet the practical needs and it can make up the shortcoming that the accuracy of Sadov's formula is not enough. So the empirical calculation formula proposed can provide a reference for the design of safety blasting surrounding important buildings.