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- Title
基于对数螺旋线离散算法的露天煤矿边坡稳定性研究.
- Authors
王 珍; 曹兰柱
- Abstract
The logarithmic spiral damage mechanism can fully meet requirements of soil velocity separationꎬ so the logarithmic spiral is widely used in the upper limit analysis of slope stability.Howeverꎬ since the logarithmic spiral can′t be manifested in Cartesian Coordinate Systemꎬ the current upper bound analysis method gives a perfect solution to the homogeneous slopes stability analysis although the research of heterogeneous slope stability is relatively rare.In order to disscus the application of upper limit analysis method in heterogeneous slope stabilityꎬthe authors proposed a new method of logarithmic spiral fitting based on discrete algorithmꎬ and applied this method to the engi ̄ neering practice of upper limit analysis of slope stability in open-pit mine.At the same timeꎬ the most dangerous slip surface and the slope stability coefficient calculation cycle program was compiled based on energy balance conditionꎬ and the residual thrust method was used to evaluate accuracy of calculation result of upper limit analysis method from two angles of stability coefficient and the most dangerous slip surface.The results show that the logarithmic spiral discrete algorithm is highly consistent with the original curveꎬ which can guarantee the requirement R2≥0.999 5.At the same timeꎬ the stability analysis results are highly accurate.The calculation result is analyzed from per ̄ spective of stability coefficient.From the perspective of stability factorsꎬ the calculation result is strictly the upper bound solutionꎬ and the calculation error is easy to estimate.From the perspective of the most dangerous slip surfaceꎬthe most dangerous slip surface obtained by this method can fully satisfy the requirements of speed separation and has a stronger engineering practice significance.
- Publication
Coal Science & Technology (0253-2336), 2019, Vol 47, Issue 6, p111
- ISSN
0253-2336
- Publication type
Article
- DOI
10.13199/ j.cnki.cst.2019.06.017