Results 51 to 60 of about 1,572 (209)

A new in situ test for the assessment of the rock-burst alarm threshold during tunnelling [PDF]

, 2023
Rock-burst is one of the most serious risks associated with hard rock tunnelling and mining at high depths. Monitoring of acoustic emissions emitted by the rock-mass during excavation and their interpretation now permits the early assessment of failure ...
A. Voza, D. Boldini, G. Ascari, L. Valguarnera, R. Marrazzo   +4 more
core   +1 more source

PNN-based Rockburst Prediction Model and Its Applications

Earth Sciences Research Journal, 2017
Rock burst is one of main engineering geological problems significantly threatening the safety of construction. Prediction of rock burst is always an important issue concerning the safety of workers and equipment in tunnels. In this paper, a novel PNN-based rock burst prediction model is proposed to determine whether rock burst will happen in the ...
Zhou, Yu, Wang, Tingling
openaire   +3 more sources

Influence of mining excavation on energy redistribution and rockburst potential [PDF]

, 2013
International audienceWith the increase of mining depth, rockburst is one of the most serious disasters which threaten the safety of mine operators and the surface stability.
Al Heib, Marwan, Didier, Christophe, Gunzburger, Yann, Lafont, G., Mitri, H.S., Piguet, Jack-Pierre   +5 more
core   +1 more source

Hard-rock stability analysis for span design in entry-type excavations with learning classifiers [PDF]

, 2016
We wish to acknowledge the computational support by the Department of Mathematics at University of Oviedo and the financial support of the University of ...
Fernández Muñiz, María Zulima, García Gonzalo, María Esperanza, García Nieto, Paulino José, Menéndez Fernández, Marta, Sánchez, Antonio Bernardo   +4 more
core   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

Deep Underground Science and Engineering, EarlyView.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu, Changhui Liang, Sijia Liu, Yongjun Zhang, Luo Wang   +4 more
wiley   +1 more source

Prediction of rockburst based on experimental systems and artificial intelligence techniques [PDF]

, 2012
Rockburst is characterized by a violent explosion of a certain block causing a sudden rupture in the rock and is quite common in deep tunnels. It is critical to understand the phenomenon of rockburst, focusing on the patterns of occurrence so these ...
He Manchao, Jia Xuena, Miranda, Tiago F. S., Peixoto, Ana, Sousa, L. R., Sousa, Rita Leal   +5 more
core  

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

Deep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

A prototype-based rockburst types and risk prediction algorithm considering intra-class variance and inter-class distance of microseismic data

Frontiers in Earth Science
The prediction and classification of rockburst risk based on microseismic data is the premise of preventing rockbursts during deep mine excavation. By reviewing previous studies, this paper finds two problems that hinder the rockburst prediction: 1 ...
Xiufeng Zhang, Guoying Li, Yang Chen, Hao Wang, Haikuan Zhang, Haitao Li, Weisheng Du, Xiao Li, Xuewei Xu, Yuze He   +9 more
doaj   +1 more source

Study on the Mechanism of Rockburst Induced by Tidal Force

Taiyuan Ligong Daxue xuebao, 2021
According to the statistical analysis of the time and region of rockburst, it is found that the time and region of rockburst have a certain correlation with the change of tidal force.
Gaochuan GUO, Yongkang YANG
doaj   +1 more source

Mechanical anisotropy of coal under coupled biaxial static and dynamic loads [PDF]

, 2021
Understanding the mechanical properties and fracturing behaviours of coal is significant for the safety of underground mining engineering. Coal failure characteristics are highly influenced by the anisotropy and loading conditions.
Du, K., Gong, S. Y., Ju, M. H., Li, J., Wang, H. C., Zhang, Q. B., Zhao, J.   +6 more
core   +1 more source