Research on the representation of granular vertical size grading and numerical simulation method with the typical waste rock site

Autor: Wang Guang-Jin, Kong Xiang-Yun, Yang Chun-he
Rok vydání: 2015
Předmět:
Zdroj: Tehnički vjesnik
Volume 22
Issue 3
ISSN: 1848-6339
1330-3651
DOI: 10.17559/tv-20150428103311
Popis: Gradiranje zrnatog materijala po vertikali, kao tipično obilježje visokog odlagališta jalovine s jednim nasipom, važan je čimbenik koji utječe na stabilnost padine odlagališta jalovine. Na bazi terenskog istraživanja raspodjele veličine zrnatog materijala tipičnog odlagališta jalovine, primjenom Cellular Automaton metode razvili smo HHC-Granular model za opis pojave gradiranja po vertikali. Što više, konstruiran je model padine, a za gradiranje veličine upotrebljen je Flac3D softver na temelju podataka prikupljenih na tipičnom odlagalištu jalovine. Stabilnost padine kod različitih načina odlaganja analizirala se primjenom konstruiranog modela padine. Rezultati su pokazali da su se na gornjoj platformi odlagališta pojavile pukotine zbog naprezanja, a klizište postojeće padine nastalo je u sredini odlagališta jalovine. Stanje postojeće padine bilo je privremeno stabilno. Za potpuno prekrivanje odlagališta s više nasipa, vektor premještanja računalnih slika pokazao je da je na vrhu odlagališta jalovine uleknuće, a na dnu se pojavila horizontalna distorzija. Do puknuća padine može doći ako se na gornjoj platformi odlagališta pojave napukline, a na dnu klizanje luka. Kad su se razmotrile karakteristike čvrstoće zrnatog materijala kao jedini faktor u analizi stabilnosti padine, gradiranje veličine zrnatog materijala po vertikali pomoglo je u stabilnosti odlagališta jalovine.
The vertical size grading of granular, as a typical characteristic with the high single-bench waste rock site, is an important factor affecting the slope stability of waste rock site. On the basis of field investigation of granular size distribution with the typical waste rock site, we used the Cellular Automaton method to develop the HHC-Granular model which could describe the phenomenon of apparent vertical size grading. Moreover, the slope model was constructed and size grading was considered with the aid of Flac3D software based on the data collected from the typical waste rock site. The slope stability of various piling up patterns had been analyzed using the constructed slope model. The results indicated that at the top platform of waste rock site appeared the obvious tension cracks and slippage position of present slope was in the middle of waste rock site. The present slope was in the stage of temporarily steady. To adopt full overlay dump of multi-bench, the displacement vector of calculation images showed that the top of waste rock site was the subsidence and the horizontal distortion appeared at its bottom. The slope failure mode was that at the top platform of waste rock site appeared the cracks and its bottom showed the arc slippage. When the strength characteristics of granular were considered as the only factor in the slope stability analysis, the vertical size grading of high-bench waste rock site was helpful to slope stability.
Databáze: OpenAIRE
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