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      地球物理勘察震源诱发振动衰减规律及安全控制分析

      Attenuation of Vibrations Induced by Seismic Sources in Geophysical Exploration and Analysis of Safety Control Standards

      • 摘要: 针对地球物理勘察中可控震源作业引发的振动传播与安全控制问题,通过理论分析与现场实测相结合的方法,系统研究了振动在岩土介质中的衰减规律。基于萨道夫斯基经验公式的形式,建立了适用于可控震源的振动衰减回归模型,提出了以振动做功为能量输入表征的衰减公式,并通过某工程现场监测数据进行了回归分析,确定了与地质和地表条件相关的关键衰减参数K与α,构建了量化预测模型。在此基础上,进一步提出了相应的振动安全控制标准,包括不同保护对象的振动速度阈值、基于衰减模型的允许作业距离。该成果不仅揭示了岩土介质对地球物理勘察震源振动传播的影响机制,也为地球物理勘察中的振动安全评价、作业安全距离的划定提供了理论依据与技术支撑,对保障水利水电等工程勘察安全具有重要意义。
         

         

        Abstract: Addressing the issues of vibration propagation and safety control arising from vibroseis operations in geophysical exploration, this study systematically investigates the attenuation law of vibrations in rock and soil media through a combination of theoretical analysis and field measurements. Based on the form of Sadovsky's empirical formula, a regression model for vibration attenuation specific to vibroseis sources was established. An attenuation formula characterized by vibration work as the energy input representation was proposed. Regression analysis was conducted using monitoring data from an engineering site, determining the key attenuation parameters K and α related to geological and surface conditions, thereby constructing a quantitative prediction model. Building on this foundation, corresponding vibration safety control standards were further proposed, including vibration velocity thresholds for different protected objects and permissible operational distances based on the attenuation model. These findings not only reveal the influence mechanism of rock and soil media on vibration propagation from geophysical exploration sources but also provide a theoretical basis and technical support for vibration safety assessment and the delineation of safe operational distances in geophysical exploration. This is of significant importance for ensuring the safety of engineering surveys in sectors such as water resources and hydropower.
         

         

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