Results 211 to 220 of about 11,313 (257)

Automated Detection of Lunar Rockfalls Using a Convolutional Neural Network

IEEE Transactions on Geoscience and Remote Sensing, 2018
This paper implements a novel approach to automatically detect and classify rockfalls in Lunar Reconnaissance Orbiter narrow angle camera (NAC) images using a single-stage dense object detector (RetinaNet).
V. Bickel, Charis Lanaras, A. Manconi, S. Loew, U. Mall   +4 more
semanticscholar   +1 more source

Rockfall Hazard Analysis for Hong Kong Based on Rockfall Inventory

Rock Mechanics and Rock Engineering, 2003
¶This paper compiles and analyzes the rockfall data in Hong Kong in the last fifty years. A simple rockfall hazard analysis is presented based on this rockfall inventory. A frequency-magnitude relation, which is analogous to the Gutenberg-Richter relation for earthquake occurrence, is proposed for rockfall, and direct correlation between rockfall ...
Liu, J, Chau, KT, Wong, RHC, Lee, CF
openaire   +3 more sources

Rockfall Mitigation Measures

1996
Highways in Kentucky contain numerous rock slopes and rockfall from these slopes represent potential dangers to motorists. As these highway rock cut slopes age and deteriorate because of weathering, the potential for rockfall and rock slides increases. Some bodily injuries and traffic fatalities have been reported in past years.
Hopkins, Tommy C., Beckham, Tony L., Puckett, William A.   +2 more
openaire   +1 more source

Experimental Verifications and Applications of 3D-DDA in Movement Characteristics and Disaster Processes of Rockfalls

Rock Mechanics and Rock Engineering, 2021
Guoyang Liu, Junjie Li, Zhuangzhuang Wang   +2 more
semanticscholar   +1 more source

Modelling Rockfall Protection Fences

2008
The paper reports an analytical formulation of a block impacting into a metallic net of a rockfall protection fence able to evaluate the net elongation and its braking time. The analytical procedure has been calibrated through a comparison with the experimental results of full-scale impact tests carried out in a vertical-drop test site.
Cantarelli G., Giani G. P., GOTTARDI, GUIDO, GOVONI, LAURA   +3 more
openaire   +2 more sources

Rockfall Full Scale Field Tests

2013
The phenomenon of rockfall along slopes is an environmental risk that frequently occurs in mountainous regions. In this phenomenon are directly involved infrastructures (railways, ordinary roads or highway) but also residential areas as well as individual structures are also interested in prevention and defense.
Clerici A., Giuriani E., Cambiaghi D., Isceri A., Vassena G., Marchina E., Cominoli L.   +6 more
openaire   +1 more source

Do Apparent "Precursory" Rockfalls Coincide with Large Rockfalls by Chance?

59th U.S. Rock Mechanics/Geomechanics Symposium
ABSTRACT: Rockfalls present a hazard to infrastructure, particularly for slopes along major roadways. Rock slope monitoring studies have linked large failures with the presence of previous, smaller spatially co-located precursory rockfalls.
E. Longar, G. Walton, L. Weidner
openaire   +1 more source

Rockfall

2012
A. Keith Turner, G.P. Jayaprakash, Jerry D. Higgins, Richard D. Andrew, Lawrence A. Pierson, Ben Arndt, John D. Duffy, Michael P. Vierling, Thomas C. Badger, Kristian Schellenberg, Steve M. Lowell, Norman I. Norrish   +11 more
openaire   +2 more sources

Numerical simulation of rockfalls colliding with a gravel cushion with varying thicknesses and particle sizes

, 2021
Chun Zhu, M. He, Q. Yin, Xiaohu Zhang
semanticscholar   +1 more source

Field experimental verifications of 3D DDA and its applications to kinematic evolutions of rockfalls

International Journal of Rock Mechanics And Mining Sciences
Guoyang Liu, Zhirui Zhong, Ke Ma, Wu Bo, Penghui Zhao, Yexin Li, Zhenping Zhang, Peng Zhang   +7 more
semanticscholar   +1 more source