Forward Simulation of Unfavorable Geological Bodies and Analysis of Waveform Characteristics Based on time Domain Finite Difference Method

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

pure and applied geophysics Pub Date : 2025-04-29 DOI:10.1007/s00024-025-03723-0

You Shuai, Yang Renshu, Yang Liyun, Duan Yun, Liu Xiangyu, Xiao Chenglong, Zhang Xiang, Yang Zhen, Li Chengxiao, Li Dongze

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Abstract

To study the waveform variation law of seismic records for advanced detection using rock-breaking vibration as a seismic source during the operation of a shaft tunneling machine, this article establishes a forward modeling of poor geological bodies based on the finite difference time domain method (FDTD). By applying the improved Hilbert–Huang transform to the collected seismic records, the time–frequency domain characteristics of the waveform are analyzed, and the results are verified using wavelet transformation. The applicability of this method for seismic signal analysis is verified. The main conclusions are as follows: The energy intensity of direct waves is much greater than that of reflected waves, and the main energy of direct waves is concentrated between 0 and 90 Hz, while the main energy of reflected waves is concentrated between 0 and 110 Hz. The overall energy of caves in poor geological bodies is the largest.

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基于时域有限差分法的不利地质体正演模拟及波形特征分析

为研究竖井掘进机运行过程中以破岩振动为震源进行超前探测的地震记录波形变化规律，建立了基于时域有限差分法（FDTD）的不良地质体正演模型。将改进的Hilbert-Huang变换应用于采集到的地震记录，分析了波形的时频域特征，并用小波变换对结果进行了验证。验证了该方法在地震信号分析中的适用性。主要结论如下：直波的能量强度远大于反射波，直波的主要能量集中在0 ~ 90hz之间，反射波的主要能量集中在0 ~ 110hz之间。贫地质体溶洞的总能量最大。

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来源期刊

pure and applied geophysics 地学-地球化学与地球物理

CiteScore

4.20

自引率

5.00%

发文量

240

审稿时长

9.8 months

期刊介绍： pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.