A5081249181- Geophysical Methods and Applications
- Rock Mechanics and Modeling
- Seismic Waves and Analysis
- Geophysical and Geoelectrical Methods
- Seismic Imaging and Inversion Techniques
- Tunneling and Rock Mechanics
- earthquake and tectonic studies
- Electrokinetic Soil Remediation Techniques
Colorado School of Mines
2016-2022
Time-domain induced polarization (TDIP) is a nonintrusive imaging technique of the subsurface that can be used to localize polarizable bodies including metallic objects and clay-rich materials. We first reviewed recent advances in interpretation data. Then, we performed laboratory sandbox experiments determine frequency-domain TDIP signature (1) metal bar sand, (2) dispersed semiconductors (e.g., pyrite) (3) bentonite. In case experiments, three types were localized center sandbox, which was...
Efficient noninvasive techniques are desired for monitoring the remediation process of contaminated soils. We applied direct current resistivity technique to image conductivity changes in sandbox experiments where two sandy and clayey soils were initially with diesel hydrocarbon. The conducted over a 230 day period. removal hydrocarbon was enhanced by bioelectrochemical system (BES) electrical potentials BES reactors also monitored during course experiment. found that variation shown...
Abstract In this study, ultrasonic waves recorded during direct shear experiments on rock joints were employed to investigate the failure processes. Three types of wave attributes systematically observed prior joints: (a) maximum in amplitude transmitted wave, (b) dominant frequency and (c) velocity wave. Different processes occurring both frictional sliding stick‐slip oscillations identified study: interseismic phase preseismic phase. The is associated with elastic loading, very small local...