Results 61 to 70 of about 14,170 (290)

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Selecting the optimal drilling and blasting design for underground excavations in underground copper mine 'Jama' Bor [PDF]

Podzemni Radovi, 2018
Drilling and blasting operations are very important part of underground excavation design. They should be performed in accordance with some criteria, such as fragmentation, excavation stability and cost.
Bogdanović Dejan, Stojanović Goran
doaj  

Comparative Study of the Excavation Damage and Rockburst of the Deeply Buried Jinping II Diversion Tunnels Using a TBM and the Drilling-Blasting Method

Advances in Civil Engineering, 2020
The rock mass failure induced by high in-situ stresses during the excavation of deep diversion tunnels is one of the key problems in the construction of the Jinping II Hydropower Station.
Jing Yang, Xing-Guo Yang, Jia-Wen Zhou, Yong Liu, Bao-Shun Dong, Hai-Bo Li   +5 more
doaj   +1 more source

Detection of nanoseismic events related to slope instabilities in the quarry district of Coreno Ausonio (Italy) [PDF]

, 2016
Le cave per l’estrazione di materiale roccioso rappresentano contesti in cui possono aver luogo eventi di instabilità gravitativa causati dalle continue sollecitazioni cui sono soggette le pareti produttive, principalmente connesse alle vibrazioni dovute
FIORUCCI, MATTEO, IANNUCCI, ROBERTO, MARTINO, Salvatore, Paciello, Antonella   +3 more
core   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Semi-supervised method for tunnel blasting quality prediction using measurement while drilling data

Journal of Rock Mechanics and Geotechnical Engineering
Predicting blasting quality during tunnel construction holds practical significance. In this study, a new semi-supervised learning method using convolutional variational autoencoder (CVAE) and deep neural network (DNN) is proposed for the prediction of ...
Hengxiang Jin, Qian Fang, Jun Wang, Jiayao Chen, Gan Wang, Guoli Zheng   +5 more
doaj   +1 more source

Overview of technologies for constructing the facilities at the Dniester pumped storage power station [PDF]

, 2019
Purpose. Perform an overview of the construction technologies and substantiate the effectiveness of the Ukrainian experience in building a pumped storage power station (PSPS) on the Dniester River in difficult engineering-geological conditions with the ...
Horbatiuk, Yu, Parinov, V, Petrenko, V, Radkevych, A, Tiutkin, O   +4 more
core   +1 more source

Amplitude Spectra of Blasting Vibration in Tunnel Excavation.

Shigen-to-Sozai, 1992
It is important to evaluate the damage of architectures and structures caused by blasting vibration. In this paper, 1) the characteristics of spectra was presented, 2) blasting vibration were observed in underground and on a ground surface, and 3) a simple numerical model was proposed to explain the spectra of the vibration.
Atsuo HIRATA, Koji ISHIYAMA, Katsuhiko KANEKO   +2 more
openaire   +2 more sources

Analysis of blasting damage in adjacent mining excavations

Journal of Rock Mechanics and Geotechnical Engineering, 2015
AbstractFollowing a small-scale wedge failure at Yukon Zinc's Wolverine Mine in Yukon, Canada, a vibration monitoring program was added to the existing rockbolt pull testing regime. The failure in the 1150 drift occurred after numerous successive blasts in an adjacent tunnel had loosened friction bolts passing through an unmapped fault.
Yugo, Nick, Shin, Woo
openaire   +2 more sources

Semi‐analytical solution for the stability of deep vertical shaft considering time‐dependent rock‐structure interaction

Deep Underground Science and Engineering, EarlyView.
A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen, Pinqiang Mo, Zhao Lu, Lianfei Kuang, Qiang Zhang, Abolfazl Eslami   +5 more
wiley   +1 more source