تحلیل قابلیت دسترسی ماشین آلات معدنی درمعدن مس سونگون

نویسندگان

1 دانشجوی دکتری مهندسی استخراج معدن دانشگاه صنعتی شاهرود

2 عضو هیئت علمی گروه معدن دانشگاه صنعتی شاهرود

3 کارشناسی ارشد استخراج معدن، دانشگاه شاهرود

چکیده

قابلیت دسترسی به سبب پیچیدگی سیستم‌های نوین امروزی، هزینه‌های عملیاتی و تضمین عملکرد صحیح محصول (خدمات)، به عنوان یک چالش در قرن 21 به‌ شمار  می‌رود. در گذشته این شاخص تنها دغدغه صنایع حساس و پیچیده مانند صنایع نظامی، هسته‌ای و هوا ‌فضا بود، در‌حالی‌که امروزه این مساله به یک نگرانی عمومی و فراگیر در اکثر صنایع به ویژه صنعت معدنکاری با تجهیزات غول‌آسا تبدیل شده است. قابلیت دسترسی به ‌لحاظ ریاضی زمان سرپایی و زمان‌ افت را دربرمی‌گیرد که این دو پارامتر در قالب دو شاخص قابلیت اطمینان و تعمیرپذیری مطرح­اند. در این مقاله پس از معرفی مفهوم قابلیت دسترسی، انواع قابلیت دسترسی، پارامترهای تشکیل دهنده‌ آن و ایده‌ اهمیت قابلیت دسترسی مورد بحث قرار گرفته است. در آخرین بخش از مقاله نیز سیستم معدنی شامل زیرسیستم‌های لودر WA470-3، بلدوزر کوماتسو D155A و دامپتراک کوماتسو HD785-5 از معدن مس سونگون در یک بازه‌ 15 ماهه تحلیل شده است. با استفاده از تحلیل‌های آماری تابع یا مدل مناسبی بر داده‌های خرابی (زمان‌ بین خرابی‌ها) و تعمیرات (زمان تا انجام تعمیر) زیرسیستم‌ها برازش شده، سپس مقدار قابلیت دسترسی زیرسیستم و سیستم محاسبه و در آخرین مرحله نیز از ایده‌ اهمیت قابلیت دسترسی برای اولویت‌بندی زیرسیستم‌ها در ساختار سیستم کلی استفاده شده است. مقدار شاخص اهمیت قابلیت دسترسی نشان داد که زیرسیستم لودر به‌ شدت نیازمند ارتقا و بهبود وضعیت عملکردی است و بهبود قابلیت تعمیرپذیری نسبت به قابلیت اطمینان اولویت بیشتری دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Availability analysis of mining machinery in Sungun copper mine

نویسندگان [English]

  • A. Nouri Gharahasanlou 1
  • R. Khalokakaie 2
  • M. Ataei 2
  • S. Fatorachi 3
1 Faculty of Mining, Petroleum & Geophysics, Shahrood University of Technology, Shahrood, Iran
2 Professor, Faculty of Mining, Petroleum & Geophysics, Shahrood University of Technology, Shahrood, Iran
3 M.Sc. of Mining Engineering, Faculty of Mining, Petroleum & Geophysics, Shahrood University of Technology, Shahrood, Iran
چکیده [English]

Availability, due to the complexity of modern systems, operation costs, and guaranteed functioning of the product, is considered as a challenge; it is also regardeded as one of the most characteristic aspects of quality in the 21st century. While availability in the past was a concern in sensitive and complex industries such as military, nuclear, and aerospace industries, today this issue has become a universal concern in most industries, especially the mining industry with gigantic equipment. In mathematical terms, availability includes up time and down time. These two parameters are presented in the form of two indicators of reliability and maintainability. In this study, after introducing the concept of availability, its variants, its constituent parts and the importance of availability  are discussed. Finally, a mining system constituting of a WA470-3 loader, D155A bulldozer, and HD785-5 dump truck is considered from Sungun copper mine () in Iran, and analyzed for a period of 15 months. The failure data (time between failures) and repairs data (time to repair) were analysed, and the fitted best function or model as well as subsystems and subsystem availability were calculated using statistical analysis. In last step, availability importance measure concept for subsystem prioritizing in mining system configuration was used. Availability importance measure indicated that the performance of loader must be immediately improved. In addition, results showed that improving maintainability has priority over reliability.

کلیدواژه‌ها [English]

  • reliability
  • maintainability
  • availability
  • Availability importance measure
  • Mine
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