Results 11 to 20 of about 32,671 (309)

Experimental study on shear performance of saw-tooth rock joint with weak interlayer under different moisture contents and filling degrees

open access: yesFrontiers in Earth Science, 2023
Rock joints are important factors affecting natural disasters such as landslides, and weak interlayer is the decisive factor for rock joint stability. Therefore, it is necessary to carry out shear test research on rock joints with weak interlayer.
Zhanyou Luo   +6 more
doaj   +1 more source

Effect of Joint Density on Rockburst Proneness of the Elastic-Brittle-Plastic Rock Mass

open access: yesShock and Vibration, 2021
The prediction of rockburst proneness is the basis of preventing and controlling rockburst disasters in rock engineering. Based on energy theory and damage mechanics, the quantitative functional relationship between joint density and energy density was ...
Jiliang Pan, Fenhua Ren, Meifeng Cai
doaj   +1 more source

Efficient and Controllable Synthesis of 1-Aminoanthraquinone via High-Temperature Ammonolysis Using Continuous-Flow Method

open access: yesMolecules, 2023
Anthraquinone dyes are the second most important type of dyes after azo dyes. In particular, 1-aminoanthraquinone has been extensively utilized in the preparation of diverse anthraquinone dyes. This study employed a continuous-flow method to synthesize 1-
Feng Zhou   +8 more
doaj   +1 more source

Toward the precision breast cancer survival prediction utilizing combined whole genome-wide expression and somatic mutation analysis

open access: yesBMC Medical Genomics, 2018
Background Breast cancer is the most common type of invasive cancer in woman. It accounts for approximately 18% of all cancer deaths worldwide. It is well known that somatic mutation plays an essential role in cancer development. Hence, we propose that a
Yifan Zhang   +5 more
doaj   +1 more source

Stress effect & scale effect on shear properties of double saw-tooth rock joint surface

open access: yesApplied Rheology, 2021
The shear properties of rock joint control the stability of rock and have an important impact on natural disasters such as landslides and debris flow. In order to study the stress effect and scale effect of shear properties of double saw-tooth rock joint,
Luo Zhanyou   +4 more
doaj   +1 more source

Experimental and Numerical Study of the Uniaxial Compressive Stress-Strain Relationship of a Rock Mass with Two Parallel Joints

open access: yesArchives of Civil Engineering, 2019
A “rock bridge”, defined as the closest distance between two joints in a rock mass, is an important feature affecting the jointed rock mass strength.
Xiong L. X.   +4 more
doaj   +1 more source

Evolution Characteristics of Plastic Zone in Jointed Rock Mass of High-Temperature Hydraulic Tunnel

open access: yesApplied Sciences, 2023
The evolution characteristics and the extent of the plastic zone in rock mass can reflect the failure characteristics and destruction degree of a hydraulic tunnel.
Kangbin Li   +3 more
doaj   +1 more source

Peak Shear Strength of Natural, Unfilled Rock Joints in the Field Based on Data from Drill Cores – A Conceptual Study Based on Large Laboratory Shear Tests

open access: yes, 2022
Significant uncertainties remain regarding the field assessment of the peak shear strength of rock joints. These uncertainties mainly originate from the lack of a verified methodology that would permit prediction of rock joints’ peak shear strength ...
Ríos Bayona, Francisco,   +3 more
core   +2 more sources

IMAGE ANALYSIS FOR MODELLING SHEAR BEHAVIOUR

open access: yesImage Analysis and Stereology, 2011
Through laboratory research performed over the past ten years, many of the critical links between fracture characteristics and hydromechanical and mechanical behaviour have been made for individual fractures.
Philippe Lopez   +5 more
doaj   +1 more source

THE SURVEY AND THE ANALYSIS OF ROCK JOINT AND THE DETERMINATION OF JOINTED ROCK MASS MODEL

open access: yesDoboku 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
openaire   +2 more sources

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