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Stability analysis of the sliding process of the west slope in Buzhaoba Open-Pit Mine

International Journal of Mining Science and Technology 2016年第5期26卷 869-875页

作者： Ning Fang Ji Changsheng Garmondyu E.Crusoe Jr. School of Art and Design School of Mines China University of Mining & Technology

To study the stability of the west slope in Buzhaoba Open-Pit Mine and determine the aging stability coefficient during slide mass development, the deformation band of the west slope and the slide mass structure of the 34,600 profile are obtained on the basis of hydrology, geology, and monitoring data.The residual thrust method is utilized to calculate the stability coefficients, which are 1.225 and 1.00 under sound and transfixion conditions, respectively. According to the rock damage and fragmentation and the principle of mechanical parameter degradation, the mechanical models of the slide mass development of the hard and soft rock slopes are established. An integrated model for calculating the slope stability coefficient is built considering water, vibration, and other external factors that pertain to the structural plane damage mechanism and the generating mechanism of the sliding mass. The change curve of the stability coefficient in the slide mass development is obtained from the relevant analyses,and afterwards, the stability control measures are proposed. The analysis results indicate that in the cracking stage of the hard rock, the slope stability coefficient decreases linearly with the increase in the length Lbof the hard rock crack zone. The linear slope is positively correlated to rock cohesion c. In the transfixion stage of the soft rock, the decrease speed of the stability coefficient is positively correlated to the residual strength of the soft rock. When the slope is stable, the stability coefficient is in a quadratic-linear relationship with the decreased height Dh of the side slope and in a linear relationship with anchoring force P.

关键词： Open-pit mine Side slope sliding process Aging stability Crack zone

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Numerical simulations of kinetic formation mechanism of Tangjiashan landslide

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Journal of Rock Mechanics and Geotechnical Engineering 2012年第2期4卷 149-159页

作者： Gang Luo Xiewen Hu Chengzhuang Gu Ying Wang Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu610031China Aseismic Engineering Technology Key Laboratory of Sichuan Province Southwest Jiaotong UniversityChengdu610031China

Tangjiashan landslide is a typical high-speed landslide hosted on consequent bedding rock. The landslide was induced by Wenchuan earthquake at a medium-steep hill slope. The occurrence of Tangjiashan landslide was basically controlled by the tectonic structure, topography, stratum lithology, slope structure, seismic waves, and strike of river. Among various factors, the seismic loading with great intensity and long duration was dominant. The landslide initiation exhibited the local amplification effect of seismic waves at the rear of the slope, the dislocation effect on the fault, and the shear failure differentiating effect on the regions between the soft and the hard layers. Based on field investigations and with the employment of the distinct element numerical simulation program UDEC （universal distinct element code）, the whole kinetic sliding process of Tan iashan landslide was represented and the formation mechanism of the consequent rock landslide under seismic loading was studied. The results are helpful for understanding seismic dynamic responses of consequent bedding rock slopes, where the slope stability could be governed by earthquakes.

关键词： Tangjiashan high-speed landslide formation mechahism sliding process numerical simulations

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维普期刊数据库

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Elastic-plastic sliding Asperity Interaction of Machined Multiscale Metal Surface

Elastic-plastic Sliding Asperity Interaction of Machined Mul...

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作者： Guoxi Li Kai Zhang Jingzhong Gong College of Mechatronics Engineering and Automation National University of Defense Technology School of Mechanical Engineering Hunan International Economics University

sliding process between asperities of machined metal surface is important to analyse wear mechanisms. Elastic-plastic sliding asperity model based on fractal geometry is proposed in this paper to extend the sliding process of single micro-asperity to a macro-asperity. The contact force, the critical interference and residual interference are calculated with fractal dimension D and fractal roughness G in the multiscale views. The influence of fractal parameters on normal and tangential contact force are studied. The results of the simulation show that the plastic deformation and residual interference are the main factors affecting the contacting force and asperity radius. For smaller G and bigger D surfaces, the sliding interaction of asperities is less remarkable and the plastic force accounts for less in the contact force.

关键词： sliding process elastic-plastic interaction fractal geometry multiscale model

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