Results 31 to 40 of about 12,048 (309)

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, Kiyoshi Kishida, Koji Tabata, Yoichi Yoshizu, Kimihiko Kunii   +4 more
openaire   +2 more sources

Numerical investigation of bolted rock joints under varying normal stress and joint roughness coefficient conditions

Frontiers in Earth Science
Rock masses are formed through long-term, complex geological processes, and the presence of joints significantly reduces their strength and increases their deformation.
Zhiyong Wang, Zhiyong Wang, Liyun Liao, Liyun Liao, Shiyi Guo, Shiyi Guo, Hanfang Zheng, Xuezhen Wu, Xuezhen Wu   +8 more
doaj   +1 more source

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, K. Seshagiri Rao, Amit Kumar Shrivastava   +2 more
doaj   +1 more source

Strength test of 3D printed artificial rock mass with pre-existing fracture

Underground Space, 2021
Discontinuities or structural planes are widely distributed in natural rock masses and significantly influence their geo-mechanical and geometric properties.
Youyu Wang, Li Wang, Fanfei Meng, Kang Chen   +3 more
doaj   +1 more source

Influence mechanism of rock joints on blasting fragmentation

Yantu gongcheng xuebao
The influences of rock joints on the formation of blasting fragmentation have always been a hot issue in blasting engineering, which is one of the most important factors affecting the construction efficiency and long-term operation safety.
HU Yingguo 1, 2, RAO Yu 1, 2, CHAI Chaozheng 3, WU Xinxia 1, 2, YANG Zhaowei 1, 2, ZHOU Xianping 1, 2
doaj   +1 more source

An approach to measure infill matric suction of irregular infilled rock joints under constant normal stiffness shearing [PDF]

, 2022
Rock joints infilled with sediments can strongly influence the strength of rock mass. As infilled joints often exist under unsaturated condition, this study investigated the influence of matric suction of infill on the overall joint shear strength.
Heitor, A, Gong, L, Indraratna, B
core   +1 more source

Application of Microbially Induced CaCO₃ on the Reinforcement of Rock Discontinuity

Applied Sciences
Microbially induced calcium carbonate precipitation (MICP) is a technique used in geotechnical engineering to reinforce soil and rock. While it is commonly used for soil reinforcement, its application for rock reinforcement in saline–alkaline ...
Simiao Zhang, Shuhong Wang, Zulkifl Ahmed, Fahad Alshawmar   +3 more
doaj   +1 more source

Studying the effect of some parameters on the stability of shallow tunnels

Journal of Sustainable Mining, 2018
Several factors have crucial impact on the serviceability of underground openings including: the quality of rock mass; the presence of rock joints and their geometrical properties; the state of in-situ stress ratio; the depth below surface and opening ...
Wael R. Abdellah, Mahrous A. Ali, Hyung-Sik Yang   +2 more
doaj   +1 more source

Clinical Practice Guideline for Evaluation and Management of Peripheral Nervous System Manifestations in Sjögren's Disease

Arthritis Care &Research, EarlyView.
Objective Sjögren's disease is an autoimmune disorder that can impact multiple organ systems, including the peripheral nervous system (PNS). PNS manifestations, which can exist concurrently, include mononeuropathies, polyneuropathies, and autonomic nervous system neuropathies.
Anahita Deboo, Robert Fox, Katherine M. Hammitt, Julie Frantsve‐Hawley, Matthew C. Baker, Stamatina Danielides, Eduardo De Sousa, Brent P. Goodman, Jennifer K. King, Steven Mandel, Ghaith Noaiseh, Pantelis P. Pavlakis, George Sarka, R. Hal Scofield, Arun Varadhachary, Daniel J. Wallace, Matt Makara, Nancy Carteron, Steven Carsons, in collaboration with the Consensus Expert Panel (CEP) members, G. Alden Adkins, Brittany Adler, Hossein Ansari, Senada Arabelovic, Alan Baer, Denis Balaban, Shamik Bhattacharyya, Evelyn Bromet, Krishna Chaganti, Kamal Chemali, Melissa Cortez, Schartess Culpepper, Paul Dellaripa, Dana Direnzo, Daniel El Bogdadi, Robert Fearon, Mehrnez Fischbach, Judi Furlong, Christopher Gibbons, Rachael Gordon, Thomas Grader Beck, Syed Haider, Larry Hollenbeck, Chadwick R. Johr, Stuart S. Kassan, Brian King, Octavia Kincaid, Eugene Kissin, Vasileios Kyttaris, Lindsay Lally, Brandon M. Law, Janet Lewis, Scott M. Lieberman, Amanda Lusa, Joseph Lutt, Rashmi Maganti, Arthur M. Mandelin, Sara McCoy, Kerry Neall, Timothy Niewold, Anne Louise Oaklander, Ruben A. Peredo‐Wende, Lynn Petruzzi, Mark A. Porter, Guada Respicio Duque, Tania Reyna, Nathaniel M. Robbins, Elliot D. Rosenstein, Laura Rosow, Breanna Ruthrauff, Amit Sachdev, Nora Sandorfi, Sarah Schafer, Elena Schiopu, Chokkalingam Siva, Daniel Small, Sara M. Stern, Lauren Stiles, Susan Stoddard, Jinny Tavee, Donald Thomas, Edward L. Treadwell, Nagagopal Venna, Steven Vernino, Frederick B. Vivino, Brittany Weber, Sepideh Yadollahi, Huiying Yu, Scott Zashin   +88 more
wiley   +1 more source

Experimental studies of scale effects on shear strength, and deformation of rock joints [PDF]

, 1980
The effect of scale on shear strength is studied by performing direct shear tests on different sized samples of large joints. A rubber moulding system is used to obtain impressions of the roughness from a variety of natural joint surfaces.
Bandis, Stavros
core