Uncertainty and Reliability Analysis of Open Pit Rock Slopes: A Critical Review of Methods of Analysis

Abdulai, Musah; Sharifzadeh, Mostafa

doi:10.1007/s10706-018-0680-y

Cited by 29 publications

(16 citation statements)

References 50 publications

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“…In a conventional approach, those methods merely concern a single input parameter value known as deterministic, and it previously applies in deterministic slope kinematic analysis. Nevertheless, the rocks' physical, mechanical, and structural properties vary from point to point and naturally in rock [6]. Thus, the conventional approach is required to be improved obviously to the probability approach considering the uncertainty of geological structural data collected from the surface of rock slope to increase the reliable result in slope design and prevention measure.…”

Section: Introductionmentioning

confidence: 99%

Rock slope kinematic analysis for planar failure: A probabilistic approach

et al. 2022

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The probabilistic kinematic analysis for rock slope has been conducted on one slope along USAID road in Aceh Province, Indonesia. This research aims to develop the modelled probability density function (PDF) and determine the probabilistic of planar failure occurrence (Pop). The geometry of discontinuity planes (dip and dip directions) and slope geometry (slope angle and slope face) were collected from our previous study. One slope with planar failure criteria was selected. The Monte Carlo simulations were performed in generating 100 new random values in 100 time iterations to produce modelled PDFs for the geometry of discontinuity plans based on statistical parameters of field observed data. The probabilistic of each experimental PDFs were computed to produce the probabilistic of planar failure occurrence. The result reveals that the distribution of dip and dip directions for experimental PDFs are considered Beta and Normal distributions. The statistical parameters produced in the model are almost likely similar to observed data. It means the model that was developed are reliable and conscientious. The rule of Φ < βj < βs and dip directions (αj) within ±20° to slope face (αs) are utilised as the boundaries to calculate the probabilistic of planar failure occurrence (Pop) which revealing 0.26.

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Section: Introductionmentioning

confidence: 99%

Rock slope kinematic analysis for planar failure: A probabilistic approach

et al. 2022

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“…With the increasing scale and depth of open-pit mining, the collapse and landslide geological disasters caused by mining occur frequently, which seriously affects the production safety of the mine as well as the surrounding buildings [1][2][3]. To reduce the loss of human life and property and ensure the normal operation of equipment, it is necessary to accurately evaluate the slope stability of open-pit mine.…”

Section: Introductionmentioning

confidence: 99%

Research on Slope Stability Evaluation Based on Improved Set Pair Analysis Method: A Case of Tonglvshan Open‐Pit Mine

Yang

Hao

et al. 2021

Shock and Vibration

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In this paper, combined with fuzzy analytic hierarchy process (FAHP), information entropy theory, and set pair analysis (SPA) theory, an improved set pair analysis model (EFAHP-SPA) for open-pit mine slope stability evaluation based on entropy method and FAHP is proposed. Taking the east-side slope of Tonglvshan north open-pit mine in Daye as an example, the proposed method is verified. First, an open-pit mine slope stability evaluation index system with 14 indicators in 4 categories, namely the topography and geomorphology, geological structure, hydrogeology, and other factors, have been constructed. Second, the objective weight and subjective weight of each evaluation index are calculated by entropy and fuzzy analytic hierarchy process, and then the comprehensive weight of the evaluation index is estimated based on subjective weight and objective weight. Afterward, the single-index connection degree between the evaluation index and the evaluation standard of the secondary subsystem is evaluated considering the improved set pair analysis theory, and the comprehensive connection degree of the system is obtained by combining it with the comprehensive weight of each evaluation index. Finally, the confidence criterion is established to discern the risk grade of slope stability in the east-side slope of the north open pit in Daye Tonglvshan mine. Moreover, case studies and comparisons of the proposed model with fuzzy comprehensive evaluation method and Entropy-SPA model were performed to confirm the validity and reliability. The results show that the evaluation results of the proposed EFAHP-SPA model are consistent with the actual situation of open-pit mines and the evaluation results of entropy-SPA model and are somewhat different from those of fuzzy comprehensive evaluation method. It indicates that the proposed EFAHP-SPA evaluation model can objectively evaluate the slope stability of the open-pit mine.

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“…The presence of groundwater in rock slopes may have a detrimental effect for several reasons among others (e.g., [4,10,17,41,69,96], as follows: (1) water pressure reduces the stability of the slopes by decreasing shear strength of potential failure surfaces [48], (2) changes in the contents of some rock formations can increase weathering and consequently decrease shear strength [42,68], (3) erosion of weathered rock can result in local instability by surface water [72] and (4) in cold weathers the freezing of the groundwater can cause wedging due to temperatures volume changes in the ice and also can block drainage paths [96].…”

Section: Introductionmentioning

confidence: 99%

“…The stage related to the identification and description of threats will be the next step, in order to evaluate risks and the formal incorporation of uncertainties in the slope issue. Risk identification models, in particular regarding instability mechanisms, can be deterministic and probabilistic ones [1,54]. The identification and description of accidents in slopes are very important, with the collection of information on movements and geometry of accidents.…”

Section: Introductionmentioning

confidence: 99%

Risk assessment on landslides focused on the role of the water: examples from model regions (Rio de Janeiro State and Hong Kong)

et al. 2021

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Landslides are one of the most vital natural hazards on Earth. To satisfy the demand for protection against landslides, it is necessary to systematically assess and manage landslide hazards and risk. Landslide mechanisms related to hydrology are analyzed with focus in the major risks, and formal risk assessment methodologies are presented in the paper. Issues related to risk assessment are discussed and different steps are described. The management of accidents in slopes is discussed, with particular emphasis to Hong Kong and Rio de Janeiro in Brazil. Hong Kong is a region of China with a large population density and very mountainous. There is a history of tragic accidents in the slopes. The territory has a tradition of a high standard in the practice of slope engineering. The establishment of an efficient security system developed by Geotechnical Engineering Office was established in the territory. Also, specific aspects of slope instability in the state of Rio de Janeiro are discussed, and in Rio de Janeiro city, with focus on cases which occurred in the mountainous region of the State. The mega-disaster that occurred in 2011, with high number of deaths and significant economic losses, is studied with incidence in individual landslides.

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Uncertainty and Reliability Analysis of Open Pit Rock Slopes: A Critical Review of Methods of Analysis

Cited by 29 publications

References 50 publications

Rock slope kinematic analysis for planar failure: A probabilistic approach

Rock slope kinematic analysis for planar failure: A probabilistic approach

Research on Slope Stability Evaluation Based on Improved Set Pair Analysis Method: A Case of Tonglvshan Open‐Pit Mine

Risk assessment on landslides focused on the role of the water: examples from model regions (Rio de Janeiro State and Hong Kong)

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