Results 71 to 80 of about 14,170 (290)

Complex Modeling of the Effects of Blasting on the Stability of Surrounding Rocks and Embankment in Water-Conveyance Tunnels

Complexity, 2018
Blasting in water-conveyance tunnels that cross rivers is vital for the safety and stability of embankments. In this work, a tunnel project that crosses the Yellow River in the north district of the first-phase Eastern Line of the South-to-North Water ...
Xian-qi Zhou, Jin Yu, Jin-bi Ye, Shi-yu Liu, Ren-guo Liao, Xiu-wen Li   +5 more
doaj   +1 more source

Caving‐enhanced geothermal system overwhelms fracturing‐ and pipe‐enhanced geothermal system in heat extraction

Deep Underground Science and Engineering, EarlyView.
Our study reveals that caving‐enhanced geothermal systems (C‐EGS) with adequately fractured reservoirs achieve optimal heat extraction by minimizing preferential flow paths, while conventional fracturing (F‐EGS) and pipe‐based (P‐EGS) systems suffer accelerated thermal drawdown.
Fangchao Kang, Tianjiao Li, Yingchun Li, Jinlong Men, Chun'an Tang   +4 more
wiley   +1 more source

Safety of engineered structures against blast vibrations: A case study

Journal of Rock Mechanics and Geotechnical Engineering, 2016
Blasting used for rock excavation is associated with ground vibrations having potential damage to surrounding structures. The extent of damage produced in a structure depends largely on ground motion characteristics, dynamic characteristics of structure ...
G.R. Tripathy, R.R. Shirke, M.D. Kudale
doaj   +1 more source

Stability Analysis and Construction Parameter Optimization of Tunnels in the Fractured Zone of Faults

International Journal of Analytical Chemistry, 2022
In order to improve the construction method of highway tunnel fault, improve the excavation level, improve the construction efficiency, reduce the project cost, and shorten the construction period, so as to find a specific road, this paper puts forward ...
Banma Huang, Haibo Chen, Chenglong Duan, Wenhu Li   +3 more
doaj   +1 more source

LEACHING OF URANIUM DEPOSITS IN MONGOLIA [PDF]

, 2018
The paper outlines the results of field, laboratory, and theoretical studies on geotechnical parameters of uranium in-situ leaching (ISL) for hydrogenous deposits located in eastern Mongolia.
KHOMENKO, Oleh, TSANDGJAV, lkhagva, Хоменко, О. Е., Хоменко, О. Є., Хоменко, Олег Евгеньевич, Хоменко, Олег Євгенович   +5 more
core  

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Characterization of the seismic environment at the Sanford Underground Laboratory, South Dakota [PDF]

, 2010
An array of seismometers is being developed at the Sanford Underground Laboratory, the former Homestake mine, in South Dakota to study the properties of underground seismic fields and Newtonian noise, and to investigate the possible advantages of ...
, , A Sajeva, Acernese F, Acernese F DeSalvo R Harms J Sajeva A Shaffner L Trancynger T, Bartos I, Beccaria M, Blackburn L, Bormann P, Caddey S W, Carter J A, Chatterji S, Creighton T, D S Rabeling, F Acernese, F Barone, G Mueller, Gutenberg B, Harjes H-P, Harms J DeSalvo R Dorsher S Mandic V, Hild S, I Bartos, J F J van den Brand, J Harms, J Heise, L Naticchioni, Lück H, M Beker, M Coughlin, N Christensen, Pavlis G L, Peterson J, R DeSalvo, Robertson N A, S Dorsher, S Kandhasamy, S Márka, Smith J R for the LSC, T O'Keefe, T Trancynger, Tatsumi D, Tolman H L, V Mandic, V Wand, Withers M M, Young I R   +45 more
core   +4 more sources

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source