تحقیق در مورد تجزیه و تحلیل پایداری شیب از سایت فوق العاده بالا دامپینگ بر اساس ماشین سلولی
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|24747||2011||6 صفحه PDF||سفارش دهید||محاسبه نشده|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Procedia Engineering, Volume 12, 2011, Pages 248–253
Apparent particle size grading is the most important characteristic of super-high dumping site. On the basis of the development of the HHC-CA model and on-site survey of granular size distribution, the slope model of current situation, had considered the features of particle size grading, was established according to a super-high dumping site. FLAC3D was used to analyze the slope stability of current situation and various piling up patterns slope based on the slope model. The results indicated that the upper displacement vector, whose displacement direction maintained the same direction of the current situation slope of a super-high dumping site, performanced for subsidence. The middle displacement vector showed shear and the displacement vector of bottom had slightly the trend of anti-lift. The slope failure model of current situation expressed in crack at the top platform and shearing out with a arc in the middle. This status of current situation slope was temporary steady stage. To adopt full overlay dump of multi-step, the displacement vector of dumping site slope showed subsidence at the top and transited to the horizontal direction at the bottom. The slope failure mode expressed in crack at the top platform and shearing out with a arc at the bottom. When considering the influence of strength characteristics of granular pile on the slope stability only, the particle size grading of super-high dumping site was helpful to slope stability.
Dumping site was the artificial slope which had been pile d up by the mining waste granular. So it had its own characteristics. The major distinction was that the super-high dumping site adopting the whole section height dump of single-step had apparent pa rticle size grading.The overall law represented  , the size of particles increased gradually with the increment of the high of dumping site, the overall trend was that small block concentrated in the upper part, large block was in th e lower, the middle part was middle block mostly. However, engineers grea tly simplified the important characteristic of dumping site in the analysis of slope stability, most of them divided the accumulational granular into the upper, middle and lower, and some engineers even took it into the same size to do slope stability analysis [2-5] . As we all knew, the strength parameters of accumulational gr anular was a critical factor to compute slope stability analysis, and the composition of different particle size was the ma in influences on the strength parameters.Therefore, such over-simplified was unscientific and unreasonable to the computing result of slope stability analysis. This article would use the cellular automata to gene rate automatically the required percentages, and calculating the slope stability needed only to enter percentages of each size group and the corresponding mechanical parameters of granular material of the super-high dumping site's each layers, while each layers did not set different mechanical pa rameters. This not only cou ld save a lot of manpower, financial resources and time, but also improve the reliability of slope calculation.