圆边块体弯曲倾倒的稳定性分析

IF 1.1 Q3 MINING & MINERAL PROCESSING
Hassan Sarfaraz
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引用次数: 3

摘要

土矿工程中常见的块体弯曲倾倒破坏是最常见的倾倒失稳破坏之一。在这种破坏中,一些岩柱由于拉伸弯曲应力而断裂,另一些由于其重量而倾覆,最后所有的石块一起倾倒。球形风化的一个特殊特征是岩柱边缘呈圆形。在受弯倾倒破坏模式下,只在砌块的上角处出现边缘的圆角,而在砌块倾倒破坏模式下,由于砌块底部存在交叉节理,砌块底部也出现了边缘的圆角。本文针对侵蚀现象,提出了块体弯曲倾倒破坏的理论模型。通过一个典型的例子和一个案例研究来评价所建议的方法。研究结果表明,在矩形棱柱块体稳定边坡中,安全系数值接近于1时,边坡发生侵蚀破坏。结果表明,所推荐的方法在分析块体屈曲倾倒破坏时是保守的,可用于块体屈曲倾倒破坏的评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stability analysis of block-flexural toppling of rock blocks with round edges
One of the most conventional toppling instabilities is the block-flexural toppling failure that occurs in civil and mining engineering projects. In this kind of failure, some rock columns are broken due to tensile bending stresses, and the others are overturned due to their weights, and finally, all of the blocks topple together. A specific feature of spheroidal weathering is the rounding of the rock column edges. In the mode of flexural toppling failure, rounding of edges happens only at the upper corners of the block but in the block toppling failure mode, due to the presence of cross-joints at the base of the block, rounding of edges also occurs at the base of the block. In this work, a theoretical model is offered to block-flexural toppling failure regarding the erosion phenomenon. The suggested methodology is evaluated through a typical example and a case study. The results of this research work illustrate that in the stable slopes with rectangular prismatic blocks, where the safety factor value is close to one, the slope is subjected to failure due to erosion. Also the results obtained show that the recommended approach is conservative in analyzing the block-flexural toppling failure, and this approach can be applied to evaluate this failure.
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来源期刊
Journal of Mining and Environment
Journal of Mining and Environment MINING & MINERAL PROCESSING-
CiteScore
1.90
自引率
25.00%
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