【摘要】 从宽带高信噪比地震勘探理论出发,结合实际的浅层激发接收条件,对炸药源激发子波的形成及近地表附近地震波的传播特征进行了研究,并对实际试验资料进行分析,提出了地震激发条件的选择方法。从传感器的动态范围对增加地震信号的反射能量的研究表明,影响地震采集信号信噪比的关键因素是传感器的动态范围,数字检波器的动态范围优于90db可以增加高频弱信号的有效采集。在理论研究的基础上进行了实地试验,试验结果表明,理论研究成果是正确的。更多还原

【Abstract】 Based on the theory of seismic exploration with wide band frequency and high signal and noise ratio and the real conditions of shooting and receiving in the near surface, this paper focuses on the research on the transmission feature of wavelet and the surface wave generated by source. The experiment result is analyzed in this paper and the approach of selecting shooting parameters is developed accordingly. The research on the effect of enhancing the reflection signal by changing dynamic range (DR) of sensors shows that the key factor of influencing the S/N ratio is DR of sensors. The effective acquisition of high frequency weak signal can be enhanced by the digital geophone whose DR is more than 90db. An experiment has been carried out based on the theory and the results confirm the correction of the theory.更多还原