Results 121 to 130 of about 26,237 (314)
Energy Science &Engineering, EarlyView.The low‐field nuclear magnetic resonance (NMR) measurements are applied to investigate the seepage characteristics of the single rough joint. The purpose of this paper is to investigate the seepage characteristics of granite specimens with single‐joint channel under the different roughness, confining pressures and seepage pressures.
Hao Cheng, Xiujie Zhong
wiley +1 more source
Sistema deposicional e petrografia dos conglomerados e arenitos da borda sul da Bacia do Itajaí, localidade de Gaspar, Santa Catarina [PDF]
, 2014 TCC(graduação) - Universidade Federal de Santa Catarina. Centro de Filosofia e Ciências Humanas. Geologia.O preenchimento sedimentar em bacias de foreland é controlado principalmente por fatores tectônicos, que governam o aporte sedimentar e o espaço de ...
Lopes, Juliana Aparecida Gonçalves
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Energy Science &Engineering, EarlyView.This study mainly explores the instability characteristics of roadways near faults in the working face. Taking the 51104 transportation roadway of the 51104 working face in Shengxin Coal Mine as the main research object, through theoretical analysis, borehole inspection, numerical simulation and on‐site mine pressure observation, the instability ...
Shuaifeng Yin +4 more
wiley +1 more source
CT&F Ciencia, Tecnología & Futuro, 1997 Patterns of porosity in sandstones of the Monserrate Formation (Upper Magdalena Valley) exposed in polished blocks have been digitally recorded using an image processor coupled to a scanning electron microscope operated in backscatter electron mode ...
R EHRLICH, G COBALEDA, J BARCLAY FERM
doaj
Meitian dizhi yu kantanObjective and MethodThe exploration of the Luohe Formation, located on the roof of the Huanglong Jurassic coalfield, faces challenges such as a lack of consensus on the sedimentary environments of sandstone aquifers and unclear lithologies with water ...
Xiaolong LI
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, 1909 This black and white photograph features sandstones that hold several fossils. This photograph was taken in Converse County, Wyoming.https://scholars.fhsu.edu/sternberg_album1/1257/thumbnail ...
Sternberg, George Fryer, 1883-1969
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Energy Science &Engineering, EarlyView.A stress wave propagation model for coal‐rock combinations under in situ stress was established. Taking a coal mine in Huainan, China as the engineering background, isotropic and anisotropic numerical models were constructed. Field engineering practices were carried out to verify the reliability of the conclusions.
Jianyu Zhang +6 more
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Energy Science &Engineering, EarlyView.One‐way FLAC3D‐COMSOL coupled modeling and field validation show that a 150 mm borehole radius with 5 m spacing provides the best coordination of plastic‐zone expansion, stress relief, permeability enhancement, and gas‐pressure attenuation, increasing the pure gas drainage rate by 35.4%. ABSTRACT To rationally determine the borehole radius and borehole
Yewu Bi +7 more
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EXPERIMENTAL FIELD investigations OF DEFORMABILITY of claystones and sandstones
, 2018 Subject: the “load”-“deformation” dependence and phases of the stress-strain state of claystones and sandstones. Research objectives: perform stamp and pressuremeter tests, analyze results of field tests and create recommendations for the design and ...
Ponomarev Andrey Budimirovicn +1 more
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