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Investigation of anisotropic strength criteria for layered rock mass
Journal of Rock Mechanics and Geotechnical EngineeringLayered rock mass is a type of engineering rock mass with sound mechanical anisotropy, which is generally unfavorable to the stability of underground works.
Chuanqing Zhang, Gang Han, Xiuli Ding
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Acta Mechanica, 1992
In this paper two problems will be solved analytically: the reflection of plane stress waves at a free boundary and the reflection and refraction of plane stress waves at a welded interface separating two dissimilar materials. In particular, stress reflection and refraction coefficients will be derived and the superimposed state of stress in regions of
P. Borejko, H. P. Rossmanith, Y. Z. Wei
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In this paper two problems will be solved analytically: the reflection of plane stress waves at a free boundary and the reflection and refraction of plane stress waves at a welded interface separating two dissimilar materials. In particular, stress reflection and refraction coefficients will be derived and the superimposed state of stress in regions of
P. Borejko, H. P. Rossmanith, Y. Z. Wei
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Layer-by-layer cutting of rocks
Journal of Mining Science, 2006To describe the process of cutting of geomaterials by a two-sided wedge, a rigid-plastic model is considered taking into account the influence the wedge speed has on the cutting force, shear plane orientation, and sizes of sheared pieces.
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A failure condition for layered rock
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1988Abstract The present paper covers a failure criterion for heterogeneous layered media, based on the assumption that each of their components follows a Mohr-Coulomb type strength condition. The “homogenization technique” employed enables the formulation of a failure condition defined by four strength parameters; the procedure for the identification of
TALIERCIO, ALBERTO +1 more
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Cold Regions Science and Technology, 2004
Instability and failures of railway/roadway embankment are mainly caused by thaw settlement of permafrost in cold regions. To protect foundation soils beneath the embankment from thaw settlement is the primary construction principle. In the present study, the heat transfer characteristics of two cases of porous media were examined experimentally, with ...
Wenbing Yu +4 more
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Instability and failures of railway/roadway embankment are mainly caused by thaw settlement of permafrost in cold regions. To protect foundation soils beneath the embankment from thaw settlement is the primary construction principle. In the present study, the heat transfer characteristics of two cases of porous media were examined experimentally, with ...
Wenbing Yu +4 more
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DFIT Analysis and Interpretation in Layered Rocks
SPE Hydraulic Fracturing Technology Conference and Exhibition, 2020Abstract Diagnostic fracture injection tests (DFITs) are often used to estimate formation properties such as closure stress, pore pressure, and matrix permeability. These estimations are typically based on analysis of pressure data assuming the closure of simple planar fractures in homogeneous reservoirs.
Shuang Zheng +3 more
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Tension Tests on Layered Rocks
Geological Society of America Bulletin, 1969Tension tests were performed on four layered rocks: a shale, a gneiss, and two sandstones. Cores 2.125 by 4.25 inches were prepared, with the layers dipping at 0°, 15°, 30°, 45°, 60°, 75°, and 90° to the short cylinder axis. All tests were carried to failure, and strain was measured by gauges mounted on the cores. Rupture strength in tension is highly
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Patterns to ores in layered rocks
Economic Geology, 1961Takes exception to a recently published interpretation of the Basal Reef in the Orange Free State gold field (South Africa) as a stream deposit, pointing out that these and adjacent beds of the upper Witwatersrand sequence are all of blanket type and exhibit features characteristic of the basal conglomerates of a transgressing sea.
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On Stress Distribution in Layered Rock Masses
Izvestiya, Physics of the Solid Earth, 2018Spatial distribution of principal stresses in a layered elastic medium is considered in the paper. Transformations of the principal stresses across an interface between the layers are analyzed. A method for reconstructing the spatial stress distributions in layered medium from several spot measurements is proposed. The introduced approach is capable of
N. V. Dubinya, A. N. Galybin
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