Results 41 to 50 of about 61,837 (250)
Applied Sciences, 2022 The converted electric field in the seismoelectric effect can be used to monitor the salinity of the reservoir. Compared to some conventional excitation methods (e.g., Monopole source), the response law of borehole shear-horizontal transverse-electric ...
Weihao Wang +4 more
doaj +1 more source
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
Measurement of representative landfill gas migration samples at landfill perimeters: a case study [PDF]
, 2009 This paper describes the development of a fully integrated autonomous system based on existing infrared sensing technology capable of monitoring landfill gas migration (specifically carbon dioxide and methane) at landfill sites.
Beirne, Stephen +3 more
core +2 more sources
Deformation Characteristics of Tianjiaba Landslide Induced by Surcharge
ISPRS International Journal of Geo-Information, 2021 The Tianjiaba landslide on the Hang Rui expressway was located in the south of Sinan County, Tongren City, Guizhou Province. From the night of 2 July to the morning of 3 July 2011, numerous house cracks, foundation subsidence, and surface cracks suddenly
Longju Zhang +4 more
doaj +1 more source
Temperature measured in borehole BK-2
, 2015 Temperature measured in borehole BK-
Mikhail N Grigoriev (6965933) +15 more
core +1 more source
Comparison of two different models for pile thermal response test interpretation [PDF]
, 2014 Thermal response tests (TRTs) are regularly used to characterise the thermal resistance of borehole heat exchangers and to assess the thermal conductivity of the surrounding ground.
Loveridge, F.A. +8 more
core +1 more source
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
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
Revista Ambiente & Água, 2015 This study evaluated the hydrogeochemical attributes and quality of groundwater resources in Ngbo, Ohaukwu Area Council of Ebonyi State, Nigeria in order to determine whether boreholes in the area were suitable for potable uses.
Omaka Ndukaku Omaka +2 more
doaj +1 more source
Rapid numerical simulation and inversion of nuclear borehole measurements acquired in vertical and deviated wells [PDF]
, 2009 textThe conventional approach for estimation of in-situ porosity is the combined use of neutron and density logs. These nuclear borehole measurements are influenced by fundamental petrophysical, fluid, and geometrical properties of the probed formation ...
Mendoza Chávez, Alberto
core