针对现有爆破地震波应力计算公式主要考虑震源参数而忽略传播介质影响的问题,采用量纲分析法,推导出了岩体爆破地震波应力方程,并结合DP屈服准则建立了岩体屈服临界振速的理论计算模型。结果表明:正应力大小与振速、介质力学参数成正相关关系;振速一定时,弹性模量越小,介质中正应力的变化越明显;弹性模量一定时,振速越大,介质中正应力的变化越明显;相比经验公式,爆破地震波正应力理论模型适用范围更广,能够更准确地模拟不同介质材料和地震波情况下的地震波传播过程;在DP屈服准则基础上,采用爆破地震波应力方程能准确的预测出不同介质材料达到屈服时的临界振速。
Aiming at the existing blasting seismic wave stress calculation formula mainly considers the source parameters and ignores the influence of the propagation medium, using the method of magnitude analysis, the blasting seismic wave stress equation of the rock body is deduced, and the theoretical calculation model of the critical vibration velocity of the rock body yielding is established by combining with the DP yielding criterion. The results show that: The magnitude of positive stress is positively correlated with the vibration velocity and the mechanical parameters of the medium. When the vibration velocity is certain, the smaller the elastic modulus is, the more obvious the change of positive stress in the medium is; when the elastic modulus is certain, the larger the vibration velocity is, the more obvious the change of positive stress in the medium is; compared with the empirical formulas, the theoretical model of the positive stress in blast seismic wave has a wider scope of application, and it can simulate the propagation of seismic waves in different medium materials and seismic wave conditions more accurately; based on the DP yield criterion, the blast seismic wave stress equation is adopted Based on the DP yield criterion, the blasting seismic wave stress equation is used to accurately predict the critical vibration velocity of different media materials when they reach yield.
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