Results 21 to 30 of about 7,837 (263)
Geofluids, 2021 Despite their frequent natural occurrence and engineering encounter, heterogeneous rock joints (rock joints with different lithological characters on both sides of the joint surface) have been studied much less systematically. To study the shear behavior
Xianzhen Cheng +4 more
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Lithosphere, 2022 An in-depth recognition of the failure characteristics and scale of joints is of great significance for the stability assessment in rock engineering. Unfortunately, due to the close fitting of the upper and lower blocks of the joint under direct shear ...
Chang Liu +3 more
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Shock and Vibration, 2021 A discrete element method code was used to investigate the damage characteristics of jointed rock masses under repetitive impact loading. The Flat-Joint Contact Model (FJCM) in the two-dimensional particle flow code (PFC2D) was used to calibrate the ...
Jie Liu, Yan-Bin Song, Yue-Mao Zhao
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Journal of Rock Mechanics and Geotechnical Engineering, 2022 In underground rock engineering, water-bearing faults may be subjected to dynamic loading, resulting in the coupling of hydraulic and dynamic hazards. Understanding the interaction mechanism between the stress waves induced by dynamic loadings and liquid-
Jin Huang +5 more
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Representative sampling method for laboratory testing on shear strength of rock joints
Frontiers in Earth Science, 2022 The direct shear test is commonly used to determine the shear strength of rock joints. The measured shear strength, however, varies greatly with specimen positions due to the heterogeneity of rock joints.
Changshuo Wang +6 more
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Study on the size effect of elastic modulus of rock considering the joint spacing
Frontiers in Materials, 2023 The relationship between the rock’s elastic modulus and deformation characteristics, affected by joint spacing and ductility, was not determined. This study investigates the size effect of the elastic modulus of rock with parallel joints using numerical ...
Tao Zhao, Tao Zhao, Tao Zhao, Gaojian Hu
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Taiyuan Ligong Daxue xuebao, 2021 The existence of non-persistent joints makes the stability, deformation characteristics, and stress distribution of surrounding rock more complicated.
Baoyu ZHANG, Changsuo ZHANG
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THE SURVEY AND THE ANALYSIS OF ROCK JOINT AND THE DETERMINATION OF JOINTED ROCK MASS MODEL
Doboku Gakkai Ronbunshu, 1996 原位置においてボーリング孔壁観察を行い, 得られた画像データをもとに不連続面の位置, 走向・傾斜, 開口幅等を画像処理により求めた. これらの結果を解析することにより, 2種類の不連続性岩盤のモデル化を行った. 一つは, 方向分析によって得られる不連続面群を用いた不連続体モデルである. 本研究では, 頻度, 面積, 開口幅を考慮した不連続面群の相対重要度を比較するパラメータの提案を行い, 実際の計測結果に適用を行った. もう一つは, 地質構造や不連続面の開口幅を考慮にいれて求めるき裂頻度をもとにした擬似連続体モデルの提案を行った. これにより, 変形性や透水性を検討する解析モデルや, ジオトモグラフィー解析などの精度向上に貢献する初期モデルの構築に利用できるものと考える.
Chikaosa Tanimoto +4 more
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The Effect of Horizontal Smooth Joints on Strength and Deformability of Sandstone [PDF]
Eurasian Journal of Science and Engineering, 2017 The Uniaxial Compressive Strength (UCS) and deformability of jointed rock are required to design structures on or in jointed rock mass. These rock masses depend on the number and orientation of joints. In this study, horizontal smooth joints were created
Younis Alshkane
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Effect of rock joint roughness on its cyclic shear behavior
Journal of Rock Mechanics and Geotechnical Engineering, 2017 Rock joints are often subjected to dynamic loads induced by earthquake and blasting during mining and rock cutting. Hence, cyclic shear load can be induced along the joints and it is important to evaluate the shear behavior of rock joint under this ...
S.M. Mahdi Niktabar +2 more
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