Results 11 to 20 of about 603 (176)
Tunnel Assessment with Borehole Radar [PDF]
Proceedings, 2016 The collapse of a tunnel and the damage in a second tunnel during the construction works, forced to the assessment of the ground in the front tunnel of the second structure, in order to avoid additional problems. The first evaluation was carried out with a borehole radar, because the structure was in a populated zone of a dense city.
Pérez Gracia, María de la Vega +3 more
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Advanced fine detection technology of coal and gas outburst danger area
Meikuang Anquan, 2022 According to the geological structure and environmental characteristics of coal and gas outburst and the shortcomings of existing outburst prediction index system, the borehole radar is used to carry out the advanced and fine detection of gas geological
ZHU Nannan +3 more
doaj +1 more source
Characteristics of a fracture network surrounding a hydrothermally altered shear zone from geophysical borehole logs [PDF]
Solid Earth, 2020 Hydrothermally active and altered fault/shear zones in crystalline rocks are of practical importance because of their potential similarities with petrothermal reservoirs and exploitable natural hydrothermal systems.
E. Caspari +10 more
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A firn dielectric log depth-tied to an ice core on the West Antarctica Ice Sheet [PDF]
Anais da Academia Brasileira de Ciências, 2022 We have estimated a 1-D permittivity model from a 100m long variable offset GPR in the West Antarctic ice sheet. That model inherits the inaccuracies in depth from the velocity model, which should be corrected before attempting to correlate it with the ...
JANDYR M. TRAVASSOS +2 more
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Remote Sensing, 2023 Geologic interpretation results from conventional ground-penetrating radar (GPR) detection methods tend to have a certain degree of uncertainty. In order to improve the reliability of ground-penetrating radars in the detection of rock mass fissures in ...
Wenxing Yuan +6 more
doaj +1 more source
Geosciences, 2020 Karst geological anomalies at pile locations significantly affect the bearing capacity and construction safety of the piles, posing a significant challenge for urbanization.
Liu Liu +3 more
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Review of Ground Penetrating Radar Applications for Water Dynamics Studies in Unsaturated Zone
Remote Sensing, 2022 For water dynamics investigation in unsaturated (vadose) zones, ground penetrating radar is a popular hydro-geophysical method because it is non-invasive for soil, has high resolution and the results have a direct link with water content.
Minghe Zhang +9 more
doaj +1 more source
Estimating reservoir permeability with borehole radar [PDF]
Geophysics, 2020 ABSTRACT In oil drilling, mud filtrate penetrates into porous formations and alters the compositions and properties of the pore fluids. This disturbs the logging signals and brings errors to reservoir evaluation. Drilling and logging engineers therefore deem mud invasion as undesired and attempt to eliminate its adverse effects ...
Feng Zhou +4 more
openaire +4 more sources
Detection imaging of impulse borehole well-logging radar
EURASIP Journal on Image and Video Processing, 2018 Borehole ground-penetrating radar (hereinafter referred to as GPR) technology is a geophysical detection method in the well, in which, the high-frequency electromagnetic waves are transmitted to stratum and the spread properties of electromagnetic waves ...
Longfei Dang, Hongchun Yang, Baohua Teng
doaj +1 more source
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020 We consider the effects of oblique incidence of a wave on the creation of a 3-D image of a planar interface with an array-type directional borehole radar. In this study, we focus on the situation where the radar probe is close to the planar interface. In
Satoshi Ebihara +5 more
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