Results 81 to 90 of about 146,439 (338)
Deep Underground Science and Engineering, EarlyView.Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei +4 more
wiley +1 more source
A Comparison of Surface-to-Coal Mine Roadway TEM and Surface TEM Responses to Water-Enriched Bodies
IEEE Access, 2019 The surface transient electromagnetic method (TEM) is a geophysical technology normally used in detecting water-enriched zones. However, with an increase of mining depth, the accuracy and reliability of surface detection is gradually reduced, and surface
Jianghao Chang +2 more
doaj +1 more source
Methods and standards development for three-dimensional mapping of the Antioch Quadrangle, Lake County, Illinois a pilot study [PDF]
, 2005 The Pilot Study for the Central Great Lakes Geologic Mapping Coalition (CGLGMC) focused on the Antioch Quadrangle, Lake County, Illinois developing a series of maps and digital products, several protocols for database development and maintenance and ...
Barnhardt, Michael L., Berg, Richard C.
core
Retracted: Three-Dimensional Inversion of Borehole-Surface Resistivity Method Based on the Unstructured Finite Element [PDF]
, 2023 International Journal of Antennas and Propagation
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Deep Underground Science and Engineering, EarlyView.A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian +6 more
wiley +1 more source
The unique devonian sections of Dniepro-Donetsk cavity. Kolaidyntsy parametric well 413. Article 1
Мінеральні ресурси України, 2015 On results the boring drilling of mining hole 413 data of geophysical works were not confirmed about the depth of bedding of crystalline breeds of foundation and thickness of the Devonian sedimentations.
V. A. Ivanyshyn +4 more
doaj
Avtomobilʹnyj Transport (Harʹkov)Problem. From the analysis of the technical literature, it was established that among the trenchless technologies for laying underground engineering communications and service pipelines, the technology with the possibility of forming a horizontally ...
Suponyev Vladimir +5 more
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Journal of Applied Sciences and Environmental Management, 2018 Previous studies revealed that soil properties play a significant role in aquifer contamination. Consequently, it is necessary to understand the nature and properties of soil in carrying out groundwater evaluation.
O.M. Omorogieva, O.I. Imasuen
doaj +1 more source
Distributed electric field sensing using fibre optics in borehole environments
, 2021 David Alumbaugh +3 more
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Deep Underground Science and Engineering, EarlyView.Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu +4 more
wiley +1 more source