In addition to field and laboratory studies of mechanical properties, development bench stability calculations should be performed. Based on this, it is possible to determine the failure curve with the greatest risk of slippage. On the other hand, the corresponding value of the safety factor. A level of +805 m was set as his daily operating limit for the Roşia Poieni open pit mine. The bench was created by cutting a 15 m thick horizontal slice equal to the height of the bench based on this plane. Thus, there were 23 benches in the Luginish region and 27 benches in the Kuratura region. The general approach angle was set at 35°. This is the angle at which the amount of tailings and the implied aperture factor are calculated. Stability analyzes were performed for the typical slope of the quarry (consisting of 24 benches) using a single bench, a two-bench system, and two methods (Fellenius and Jambu). The values obtained are above 1.3 for the single-slope and two-bank systems and above 3.754 for the typical slope, corresponding to the values imposed by the standards. A polygonal slip surface was also modeled. These landslide-prone areas occur on the slopes of the Russian Punic Quarry, due to the natural cracking system of the massif and secondary cracks caused by the operations used for drilling and blasting (development technology) There is a possibility. Stability assessment was performed using the Hoek graph analysis method and the safety factor values found meet the requirement of 1.3 or higher. Under these circumstances, no additional measures are required to increase the stability reserve.
Author(s) Details:
Mihaela Toderaș,
Department of Mining Engineering, Surveying and Underground Constructions, University of Petrosani, 20, University Street, Petrosani, Romania.
Please see the link here: https://stm.bookpi.org/TAIER-V3/article/view/8429
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