Results 21 to 30 of about 93,670 (295)

Complex Analytical Study of the Stability of Tunnel-Surrounding Rock in a Layered Jointed Rock Mass [PDF]

Mathematical Problems in Engineering, 2020
A barrier function method based on the fmincon optimization function in MATLAB was used to determine the function to map a tunnel boundary to the unit circle in the complex plane, and a structural failure criterion of the mapping convergence was established based on the reliability theory of underground engineering.
Su Wu, Kegang Li, Zaihong Yang, Shunchuan Wu, Ting Wang, Qingci Qin, Mingliang Li   +6 more
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Numerical Simulation of Rock Mass Structure Effect on Tunnel Smooth Blasting Quality: A Case Study

Applied Sciences, 2021
Taking the Zigaojian tunnel, Hangzhou–Huangshan high-speed railway, China, as background, the rock mass structure effect on smooth blasting quality was studied.
Jianxiu Wang, Ansheng Cao, Jiaxing Liu, Huanran Wang, Xiaotian Liu, Huboqiang Li, Yuanwei Sun, Yanxia Long, Fan Wu   +8 more
doaj   +1 more source

Optimization of direct-hole cutting blasting technology for deep-buried layered surrounding rock diversion tunnels

地质科技通报, 2023
Objective In recent years, the trend of tunnel blasting construction extending to depth is becoming more and more significant, and the influence of layered rock mass in deep buried diversion tunnel on cutting quality in blasting construction is the key ...
Shouguo Jiang, Shuaibing Luo, Nan Jiang, Jianbin Sun, Haibo Zhou   +4 more
doaj   +1 more source

Geological features and marble production qualities of Western Turkey [PDF]

, 2019
Purpose. Isparta Angle occurs along the Mesozoic carbonate axis. Carbonated rocks forming the Taurus belt are continuous with allochthonous and autochthonous features.
Leventeli, Y, Ozcelik, M
core   +1 more source

Seismic Responses and Damage Mechanisms of Deep-Buried Underground Powerhouse in Layered Rock Mass

Shock and Vibration, 2022
Layered rock mass generally has adverse effects on the seismic stability of deep-buried underground powerhouses. Aiming at the complexity of seismic wave field in deep-buried underground powerhouses, the obliquely input methods of P and SV waves ...
Meng Zhao, Ming Xiao, Juntao Chen, Hancheng Jin   +3 more
doaj   +1 more source

Blastability Classification of Fractured Rock Mass Based on Weighted Clustering Analysis

Chemical Engineering Transactions, 2017
This paper classifies the blastability of fractured rock mass based on the solid coefficient, rock impedance, unit explosive consumption and mean fracture spacing. Specifically, an evaluation model was established according to the principle of clustering
Tiejun Tao, Ping Huang, Jianmin Zhou, Hongbing Yu, Jie Li   +4 more
doaj   +1 more source

Experimental study on the shear failure of layered rock bridges

Frontiers in Earth Science, 2023
The structural face of rock plays a decisive role in the stability of geotechnical engineering, and the mechanism of failure destabilization of layered rock masses is still unclear.
Jianxin Yu, Jianxin Yu, Zhibin Zhou, Huanchun Liu, Lianhao Zhou, Zhenzhen Li, Long Cheng, Long Cheng   +7 more
doaj   +1 more source

Testing the ureilite projectile hypothesis for the El'gygytgyn impact: determination of siderophile element abundances and Os isotope ratios in ICDP drill core samples and melt rocks [PDF]

, 2013
The geochemical nature of the impactites from International Continental Scientific Drilling Project-El'gygytgyn lake drill core 1C is compared with that of impact melt rock fragments collected near the western rim of the structure and literature data ...
Abe, Alvarez, Anderson, Bell, Belyi, Binzel, Bogard, Buchwald, Burbine, Claeys, Collins, Dabizha, Doerffel, Evans, Feldman, Foriel, Gaffey, Gebhardt, Gelinas, Glushkova, Goderis, Goderis, Goderis, Goderis, Govindaraju, Grieve, Gurov, Gurov, Gurov, Gurov, Gurov, Gurov, Hall, Hassler, Heiken, Hutchison, Jenniskens, Kenkmann, Koeberl, Koeberl, Koeberl, Koeberl, Korotev, Kyte, Kyte, Layer, Maier, Marti, McDonald, McDonald, McDonough, Meisel, Meisel, Melles, Melles, Melles, Morgan, Morgan, Nakamura, Nowaczyk, Palme, Palme, Palme, Palme, Palme, Pernicka, Peucker-Ehrenbrink, Pieters, Plessen, Rankenburg, Raschke, Rollinson, Schmidt, Schmidt, Shukolyukov, Sigurdsson, Simonson, Smit, Stone, Tagle, Tagle, Tagle, Tagle, Tagle, Taylor, Trinquier, Va'lter, Warren, Wasson, Wedepohl, Weisberg, Wittmann, Wolf, Yurimoto, Zolensky   +94 more
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Prediction of Blasting Vibration Velocity of Layered Rock Mass under Multihole Cut Blasting

Shock and Vibration, 2021
In the blasting construction of underground engineering in layered rock mass, the mechanism of cut blasting and the propagation law of blasting vibration waves are very complex.
Jie Zhu, Haixia Wei, Xiaolin Yang, Huaibao Chu   +3 more
doaj   +1 more source

Modification of rock mass rating system: Interbedding of strong and weak rock layers

Journal of Rock Mechanics and Geotechnical Engineering, 2017
Rock mass classification systems are the very important part for underground projects and rock mass rating (RMR) is one of the most commonly applied classification systems in numerous civil and mining projects. The type of rock mass consisting of an interbedding of strong and weak layers poses difficulties and uncertainties for determining the RMR. For
Mohammad Mohammadi, Mohammad Farouq Hossaini   +1 more
openaire   +2 more sources