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Experimental and Numerical Analysis of Rock Block Stability Using a Remotely Positioned Laser Doppler Vibrometer

Journal of Civil Engineering and Architecture 2014年第5期8卷 624-632页

作者： Guichen Ma Kazuhide Sawada Atsushi Yashima Fumiaki Uehan Osamu Murata Hideki Saito Yasunori Ootsuka Engineering Headquarters O YO Corporation Saitama 331-8688 Japan Department of Civil Engineering Gifu University Gifu 501-1193 Japan Structural Mechanics Laboratory Railway Technical Research Institute Tokyo 185-8540 Japan

This paper examines a new method of evaluating the stability of a rock slope using a remotely positioned LDV （laser Doppler vibrometer）. We conducted an experiment using physical models and performed a numerical analysis to evaluate the new method. The physical model included：（l） concrete blocks on an artificial soil slope with two block sizes and three slopes; （2） concrete blocks bonded to the concrete base with different contact area. The LDV measurements agreed with conventional seismometer measurements. The dominant frequency of the blocks varied with the stability and dominant frequency and the amplitude varied with the block size. The numerical model was used to examine a concrete block adhered to a concrete base with different contact areas. The dominant frequency of the blocks determined using the numerical model agreed with those obtained from the physical experiments. We analyzed different sized blocks to examine the scaling effects. The dominant frequency of the blocks was inversely related to the block size. These results demonstrated the effectiveness of LDV for evaluating the stability of rock slopes and cleared the block size scaling effects.

关键词： Field measurements risks and hazards rock failure rock mass stability analysis.

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Seismic stability analysis of rock slopes using the numerical manifold method

Seismic stability analysis of rock slopes using the numerica...

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Harmonising Rock Engineering and the Environment—12th ISRM International Congress on Rock Mechanics

作者： X.M.An&Y.J.Ning School of Civil and Environmental Engineering Nanyang Technological University Singapore G.W.Ma School of Civil and Resource Engineering University of Western Australia Crawley WA Australia Z.Y.Zhao School of Civil and Environmental Engineering Nanyang Technological University Singapore

＜正＞Seismic stability of rock slopes is numerically investigated using the numerical manifold method（NMM）.A parallelepiped block resting on an inclined plane as shown in Figure 1,which has been considered as a first approximation of the rock slope stability conditions,is employed in this study to find out the fundamentals of seismic instabilities of rock slopes and to validate the NMM for seismic instability analysis of rock slopes.

关键词： Numerical modeling risks and hazards Stability analysis

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Investigation into the strength of iron ore pillars in the Lorraine basin

Investigation into the strength of iron ore pillars in the L...

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Harmonising Rock Engineering and the Environment—12th ISRM International Congress on Rock Mechanics

作者： J.Nielen van der Merwe Christophe Didier Frederic Poulard University of the Witwatersrand South Africa

＜正＞1 INTRODUCTION Iron ore mining was carried out in the Lorraine district in the north-east of France for several *** predominant mining method was bord and pillar,with pillar extraction in some *** is no evidence today that a formal design method for pillar size was in *** appear to have been sized by trial and error. Mining ceased in *** knowledge of the pillar strength is not required now for mining purposes,it is important for the evaluation of pillar stability and hence surface stability as the region has been extensively built up. The method of analysis was essentially to create data bases

关键词： risks and hazards stability analysis back analysis case studies rock failure

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