The tunnel boring machine (TBM) is used extensively to mechanically excavate tunnels. To
optimize the mechanical drilling and work safely, an estimate of the geology to be drilled is …

Advanced geophysical sensing while drilling is being driven by trends to automate and
optimize drilling and the desire to better characterize complex near surface and overburden …

Drill‐bit seismic while drilling provides reverse vertical seismic profiles with large
configurations of surface seismic sensors. This seismic while drilling technique makes it …

We discuss the use of autocorrelogram interferometry by using noise from the tunnel-boring
machine (TBM). The TBM provides seismic signals/waves while drilling in a tunnel (TSWD) …

Transfer matrix method and finite difference method were used to get frequency spectra of
impulse response to simulate the transmission characteristics of longitudinal wave traveling …

摘要随钻地震(SWD) 的波场十分复杂, 对钻头有效信号和地表机械干扰成分的分析是SWD
重要的资料预处理步骤. 本文利用有效信号和噪声带有周期性或时延差异等时间结构特征 …

For four decades, the use of the drill-bit seismic source has been evaluated extensively and
investigated for seismic-while-drilling (SWD) purposes. After an initial diffusion phase …

Processing seismic data from drillbit-generated vibrations requires a reliable source
signature for correlation and deconvolution purposes. Recently, a land field trial has been …

ABSTRACT Seismic-while-drilling (SWD) by drill-bit source has been successfully used in
the past few decades and is proven using variable configurations in onshore applications …

An issue in seismic-while-drilling (SWD) technology is to characterize the dynamic and
radiation properties of the drill-bit source working under different operational conditions. The …