【摘要】 通过地下结构与围岩爆破震动频幅特性分析,围绕地下工程爆破地震效应现象产生与原因,就爆破震动观测与分析结果进行了解释与原因探讨。主要利用质点振动速度峰值和主振频率及次主频在药量和距离条件下的变化与分布关系,来阐述与解释围岩介质体中爆破地震波的传播规律以及地下结构与围岩爆破地震效应。更多还原

【Abstract】 Based on blasting seismic monitoring,the frequency and amplitude analysis of underground structure and surrounding rock are described by analyzing the peak particle velocity(PPV) and its main frequency.The reasons of the blasting seismic effects of underground structure and surrounding rock are discussed.Firstly,it is mentioned how to settle monitoring line and position according to the following: principles the principle of the position and direction of the maximum PPV,the principle of monitoring of blasting seismic effects,and the principle of the blasting vibration waves decay.Then,the information and results of monitoring are given,and the attenuation formula of the maximum PPV and explosives with distance between blasting center and monitoring position is shown,and the relationship between PPV and ratio charge blasting vibration is pointed out too.The results show that the maximum PPV attenuation velocity is faster in near area than in the further,and the main frequency focus on 15～75Hz especially on 45Hz,that the PPV and its main frequency have close relation with the charge and distance between blasting center and monitoring position.The decaying of the blasting seismic waves related mainly with the neutrality and characteristics of propagation media mass.更多还原