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Paper Information

Journal:   INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING   2017 , Volume 51 , Number 1; Page(s) 79 To 90.
 
Paper: 

NUMERICAL PROBABILISTIC ANALYSIS FOR SLOPE STABILITY IN FRACTURED ROCK MASSES USING DFN-DEM APPROACH

 
 
Author(s):  BAGHBANAN ALIREZA*, KEFAYATI SADEGH, TORKAN MASOUD, HASHEMOLHOSSEINI HAMID, NARIMANI DEHNAVI ROOHOLLAH
 
* DEPARTMENT OF MINING ENGINEERING, ISFAHAN UNIVERSITY OF TECHNOLOGY (IUT), ISFAHAN, IRAN
 
Abstract: 

Due to the uncertainties in input geometrical properties of fractures, there is no unique solution for assessing the stability of slopes in jointed rock masses. Therefore, the necessity of applying probabilistic analysis is inevitable on these cases. In this study, a probabilistic analysis procedure along with relevant algorithms were developed using Discrete Fracture Network-Distinct Element Method (DFN-DEM) approach. In the right abutment of Karun 4 dam and downstream, five joint sets and one major joint were identified. According to the geometrical properties of fractures in the Karun river valley, instability situations seemed applicable on this abutment. In order to evaluate the stability of a rock slope, different combinations of joint set geometrical parameters were selected, and a series of numerical DEM simulations were performed on generated and validated DFN models in DFN-DEM approach to measure minimum required support patterns in dry and saturated conditions. Results indicate that the distribution of required bolt length was well fitted with a lognormal distribution in both circumstances. In dry conditions, the calculated mean value was 1125.3 m, and more than 80 percent of models needed only 1614.99 m of bolts which was equivalent to a bolt pattern of 2 m spacing and 12 m length. However, as for the slopes with saturated condition, the calculated mean value was 1821.8 m, and more than 80 percent of models needed only 2653.49 m of bolts which was equivalent to a bolt pattern of 15 m length and 1.5 m spacing. Comparing the obtained results with that of numerical and empirical methods show that the investigation of a slope stability with different DFN realizations which were conducted in different block patterns was more efficient than the empirical methods.

 
Keyword(s): ROCK SLOPE, DISCRETE FRACTURE NETWORK, PROBABILISTIC ANALYSIS, DISCRETE ELEMENT METHOD, MONTE CARLO SIMULATION
 
 
References: 
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Citations: 
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APA: Copy

BAGHBANAN, A., & KEFAYATI, S., & TORKAN, M., & HASHEMOLHOSSEINI, H., & NARIMANI DEHNAVI, R. (2017). NUMERICAL PROBABILISTIC ANALYSIS FOR SLOPE STABILITY IN FRACTURED ROCK MASSES USING DFN-DEM APPROACH. INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING, 51(1), 79-90. https://www.sid.ir/en/journal/ViewPaper.aspx?id=572709



Vancouver: Copy

BAGHBANAN ALIREZA, KEFAYATI SADEGH, TORKAN MASOUD, HASHEMOLHOSSEINI HAMID, NARIMANI DEHNAVI ROOHOLLAH. NUMERICAL PROBABILISTIC ANALYSIS FOR SLOPE STABILITY IN FRACTURED ROCK MASSES USING DFN-DEM APPROACH. INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING. 2017 [cited 2021August04];51(1):79-90. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=572709



IEEE: Copy

BAGHBANAN, A., KEFAYATI, S., TORKAN, M., HASHEMOLHOSSEINI, H., NARIMANI DEHNAVI, R., 2017. NUMERICAL PROBABILISTIC ANALYSIS FOR SLOPE STABILITY IN FRACTURED ROCK MASSES USING DFN-DEM APPROACH. INTERNATIONAL JOURNAL OF MINING AND GEO-ENGINEERING, [online] 51(1), pp.79-90. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=572709.



 
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