Study on Key Controlling Factors of Fracture Propagation by Shaped Charge Blasting in Coal Seams
Energy Science &Engineering, EarlyView.Gas drainage is the fundamental approach to controlling gas disasters in coal mines. For single low‐permeability coal seams, it should be supplemented by coal seam permeability enhancement technologies to improve gas drainage efficiency. This paper conducted a numerical simulation study on the key controlling factors affecting the fracturing effect of ...
Xin Yang +4 more
wiley +1 more source
Study on the Law of Multi‐Fracture Propagation in Different Fracturing Fluid Viscosity
Energy Science &Engineering, EarlyView.Samples and equipment Sample preparation Test equipment Analysis of test results Fracture propagation morphology Influence of fracturing fluid viscosity on crack initiation time/(fracture initiation pressure) Evolution law of injection pressure Cumulative relation curve of pressure–time–acoustic ABSTRACT Using the TCHFSM‐I large‐scale accurate triaxial
Zhixing Zhang +4 more
wiley +1 more source
Undrained shear strength of partially saturated sand in triaxial tests
Bulletin of the New Zealand Society for Earthquake Engineering, 2009 The undrained shear strength of partially saturated sand is examined based on a series of undrained triaxial compression and extension tests on Toyoura sand. The effects of partial saturation, density, and triaxial compression/extension modes are discussed in detail.
Toshiyuki Kamata +2 more
openaire +1 more source
A finite-strain hyperviscoplastic model and undrained triaxial tests of peat
, 2017 This paper presents a finite-strain hyperviscoplastic constitutive model within a thermodynamically consistent framework for peat which was categorised as a material with both rate-dependent and thermodynamic equilibrium hysteresis based on the data ...
Nagel, T., O'Kelly, B. C., Zhang, L.
core
An Analytical Model for the Triaxial Collapse of Cosmological Perturbations
, 1994 We present an analytical model for the non-spherical collapse of overdense regions out of a Gaussian random field of initial cosmological perturbations.
Eisenstein, Daniel J., Loeb, Abraham
core +1 more source
Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters
Energy Science &Engineering, EarlyView.Drilling detection test platform. ABSTRACT During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling signals from roof bolters.
Qiang Zhu +4 more
wiley +1 more source
Advances in Civil Engineering, 2018 Consolidated undrained triaxial compression tests were performed to investigate the shear strength behavior of the solidified dredged materials (SDM). The variation law of deviator stress and excess pore water pressure with the increase of the applied ...
Jianwen Ding +4 more
doaj +1 more source
Shear wave velocity measurement of Bangkok clay under triaxial testing with various stress paths [PDF]
, 2019 Sirichai Pethrung
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Extended Kelvin–Voigt Model for Simulating Thermally Accelerated Creep in Fine‐Grained Soils
International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.ABSTRACT The subsurface undergoes temperature variations in many situations due to anthropogenic and natural causes, which strongly influence the long‐term behavior of soils. These phenomena can involve temperature anomalies in the ground across distances of a few meters, as in the case of nuclear waste repositories, to distances encompassing entire ...
Giulia Capati +2 more
wiley +1 more source
Effect of the Particle Size on TDA Shear Strength Parameters in Triaxial Tests [PDF]
, 2021 Hany El Naggar, Khaled Zahran
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