Results 71 to 80 of about 1,259,198 (268)
Micromechanics of seismic wave propagation in granular materials [PDF]
, 2015 In this study experimental data on a model soil in a cubical cell are compared with both discrete element (DEM) simulations and continuum analyses. The experiments and simulations used point source transmitters and receivers to evaluate the shear and ...
Hamlin, S +5 more
core +2 more sources
Deep Underground Science and Engineering, EarlyView.B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza +4 more
wiley +1 more source
, 2013 [1] In situ test of hydraulic fracturing (HF) provides the only way to observe in situ stress magnitudes directly. The maximum and minimum horizontal stresses, SHmax and Shmin, are determined from critical borehole pressures, i.e., the reopening pressure
Boutt, David +21 more
core +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
True Triaxial Testing System For Geotechnical Engineering Education [PDF]
1996 Annual Conference Proceedings, 2020 Comment: 6 ...
openaire +2 more sources
NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos [PDF]
, 2017 The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) reactivation mission has completed its third year of surveying the sky in the thermal infrared for near-Earth asteroids and comets.
Bauer, J. M. +8 more
core +3 more sources
Study on Deformation Law of Crossing Layer Drilling Superimposed Floor Roadway
Energy Science &Engineering, EarlyView.Based on deformation law of crossing layer drilling superimposed floor roadway, low dip angle drilling is particularly susceptible to complications such as borehole blockage and collapse. ABSTRACT Floor extraction roadway crossing layer drilling is a pivotal strategy for gas control in areas prone to coal and gas outbursts.
Xiao Liu +9 more
wiley +1 more source
Resonance in rock mass as the key reason of geodynamic phenomena [PDF]
, 2019 Purpose is to develop deformation criterion or predecessors of geodynamic phenomena within rock mass relying upon the systemized experimental data concerning rock behaviour in a volumetric field of compressive stress. Methods.
Nosach, O, Riazantsev, A, Riazantsev, M
core +1 more source
International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.ABSTRACT Saturated high plasticity clays show complex nonlinear, rate‐dependent, and hysteresis behaviors under non‐monotonic stress paths, requiring advanced mathematical constitutive equations for accurate description. Taking into account the inherent advantages of kinematic hardening mechanisms in simulating complex stress histories, this paper ...
Wei Cheng, Zhen‐Yu Yin
wiley +1 more source
Quasistatic rheology and the origins of strain [PDF]
, 2002 Published in special issue of "Comptes-Rendus Physique" on granular materialsInternational audienceFeatures of rheological laws applied to solid-like granular materials are recalled and confronted to microscopic approaches via discrete numerical ...
Combe, Gaël, Roux, Jean-Noël
core +3 more sources