نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش آموخته کارشناسی ارشد استخراج معدن دانشکده مهندسی معدن و متالورژی دانشگاه یزد
2 دانشکده مهندسی معدن و متالورژی دانشگاه یزد
3 استادیار، دانشکده مهندسی معدن و متالورژی دانشگاه یزد
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The design process for underground mines is more complex than that of open-pit mines due to the complexity and large number of factors influencing the selection of the mining method. In modern underground mining, however, in addition to considering all influencing factors, safety requirements, and operational constraints, the selection of an appropriate mining method, the design of stopes, and their implementation are of critical importance. Furthermore, economic feasibility, geotechnical stability, equipment compatibility, production efficiency, and environmental considerations must be carefully evaluated throughout the planning process to ensure that the selected mining approach achieves both technical reliability and sustainable long-term operational performance. Lead–zinc ore deposits with narrow thicknesses, scattered distribution, and steep dips require specialized mining methods because of their more complex geological conditions compared to other types of ore deposits. In this study, the Hoz-e Sefid Ardakan lead–zinc mine was selected as the case study. Accordingly, three mining plans were proposed for Block A and two mining plans for the Abbaspour Block, all of which were designed using Datamine software. The analyses, considering development and execution time, as well as the costs of drilling, blasting, labor, fuel, and equipment for tunnels, raises, and drawpoints, together with the tonnage, grade, and revenue generated by the designs, showed that Design 3 for Block A, with a tonnage of 18,813.97 t, a grade of 7.6%, 25% dilution, and 59.75% recovery, and Design 1 for the Abbaspour Block, with a tonnage of 16,404.48 t, a grade of 11.45%, 18% dilution, and 68.76% recovery, were selected as the optimal designs. Sensitivity analysis showed that the net profit of the designs is most sensitive to the concentrate selling price. A 30% decrease in the concentrate selling price resulted in a 38% reduction in the profits of both Design 1 for the Abbaspour Block and Design 3 for Block A. The results of this study indicate that the use of drawpoints in conjunction with sublevels improves blasting efficiency, increases advance rates, and reduces preparation costs.
کلیدواژه‌ها [English]
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