تخمین قطعات یدکی مورد نیاز در معادن به روش تحلیل قابلیت اطمینان، مطالعه موردی معدن مس سونگون

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشکده معدن، ژئوفیزیک و نفت، دانشگاه صنعتی شاهرود

2 مدیر شرکت بین‌المللی SGS شعبه تبریز، ایران

10.29252/anm.8.15.25

چکیده

مدیریت قطعات یدکی و تدارکات، وجهی از مدیریت پشتیبانی محصولات و مؤثر در هزینه چرخه عمر محصول است. دسترسی به قطعات یدکی به هنگام تقاضا، زمان افت سیستم/ماشین را کاهش داده و کارایی آن را افزایش و در نتیجه سود حاصله از کل پروژه را افزایش خواهد داد. در صورت ذخیره تعداد بهینه قطعات یدکی در انبار، هزینه‌های چرخه عمر محصول به عنوان تابع هدف، کمینه خواهد شد. تعداد بهینه قطعات‌یدکی را نیز می‌توان با وارد نمودن عوامل مختلف مانند تعداد وقوع خرابی، تعداد تجهیزات موجود، حساسیت قطعه، هزینه‌های خرید قطعه، فاصله بین تولیدکننده تا مصرف‌کننده و زمان‌های تأخیر بین تصمیم تا اجرا تعیین کرد. تخمین قطعات یدکی مورد نیاز بر اساس ویژگی‌های فنی و کارکردی سیستم و اجزاء یکی از مؤثرترین راه‌ها برای بهینه‌سازی توقفات ناخواسته است. از این‌رو در این مقاله رویکرد پیش‌بینی قطعات یدکی مورد نیاز بر اساس قابلیت اطمینان پیشنهاد شده است. در این رویکرد نخست قابلیت اطمینان جزء، بر اساس داده‌های خرابی تعیین شده و سپس تعداد قطعات یدکی موردنیاز، میزان سفارش بهینه و زمان ارسال سفارش بر اساس مصرف سالیانه محاسبه خواهد شد. همچنین به‌منظور کاربرد اجرایی رویکرد پیشنهادی مطالعه موردی از معدن مس سونگون بررسی شده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Mining Spare Parts Provision by Reliability Analysis, Case Study: Sungun Copper Mine

نویسندگان [English]

  • Ali Nouri Gharahasanloo 1
  • Reza Khalokakaie 1
  • Mohammad Ataei 1
  • Mehdi Mokhberdoran 2
1 Dept. of Mining, Geophysics & Petroleum Shahrood University of Technology, Iran
2 Branch Manager of SGS, Tabriz, Iran
چکیده [English]

Summary
Maintenance and spare parts support are two basic and critical issues of support to product, because often due to lack of technology and other compelling factors (like economy, environmental situations, etc), in the design phase it is impossible to design a product that will fulfill its function. Therefore, the need for support haw become vital to enhance system effectiveness and prevent unexpected failure. This paper was focused on second issues of support. Thus, for studying of the required spare parts, we analyzed the failure time data for a period of 11 years, which has been obtained from Sungun Copper mine in Iran. The expected number of the required spare tires in one year (three working shifts per day) when ,  and  hours for lower, optimum and upper value are considered to be the real mean time to failure of the tire with a 95 percent confidence of availability are equal to 3.2, 2 and 1.2 respectively. Then, the economic order quantity with respect to annual demand rate is calculated.
 
Introduction
Product support falls into two broad categories, namely support to the customer and support to the product. The research presented in this paper is focused on support to the product, which is greatly influenced by the product reliability characteristics. Spare parts organize one of the product support issues that can be divided into two types, namely repairable and non-repairable. In the present research we deal with non-repairable parts. Spare parts provisioning is a complex problem and requires an accurate analysis of all factors that may affect the required number of spare parts. Different reliability based statistical approaches have been developed for spare parts provision. The reliability-based spare parts provision is the most common one.
 
Methodology and Approaches
The methodology is based on three main tasks, 1) Definition of boundaries, assumptions, and data collection.2) Identification of analysis approach and estimation of component reliability and failure rate characteristics. 3) Required spare parts calculation and inventory management requirements
 
Results and Conclusions
In this paper, a methodology is proposed to consider reliability in the required spare parts tires estimation. The result of analysis for optimum estimation of PLP parameters presented that for a year dump truck need 2 new tires. For inventory management whenever the inventory position reaches 1 units/dump truck, we should order 2 units/dump truck.

کلیدواژه‌ها [English]

  • Mining
  • Reliability
  • Spare parts
  • Tire
  • Sungun Copper Mine
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