نشریه مهندسی معدن

نشریه مهندسی معدن

بهبود بخش آماده‌سازی و استخراج در معادن زیرزمینی زغال‌سنگ با استفاده از نقشه جریان ارزش

نوع مقاله : علمی - پژوهشی

نویسندگان
1 دانشجوی دکترای استخراج معدن، دانشکده مهندسی معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، ایران
2 استاد، دانشکده مهندسی معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود، ایران
3 محقق پسادکتری، دانشکده مهندسی و ایمنی، دانشگاه ترومسو، نروژ
4 استاد، دانشکده مهندسی و ایمنی، دانشگاه ترومسو، نروژ
چکیده
اجرای تولید ناب در واحدهای معدنی تأثیر مستقیم در ارتقای جایگاه رقابتی این واحدها و سودآور بودنشان دارد. هدف از مطالعه حاضر، شناسایی فرصت‌های بهبود و ارتقاء فرآیندهای بخش آماده‌سازی و استخراج در معادن زیرزمینی زغال‌سنگ غیر مکانیزه با استفاده از روش نقشه جریان ارزش در شرکت معادن زغال‌سنگ البرز شرقی است. این مطالعه یک پژوهش کمّی است و داده‌های مورد نیاز از طریق اندازه‌گیری‌های میدانی جمع‌آوری شده است. زمان سپری شده برای هر اقدام، از زمان شروع تا انتهای هر فرآیند در بخش آماده‌سازی و استخراج اندازه‌گیری و در نقشه جریان ارزش ثبت شد. پس از آن در جلسات بحث گروهی با حضور کارشناسان و مدیران، نقشه ترسیم و تحلیل شد و منابع اتلاف شناسایی شد و با استفاده از ابزارهای تفکر ناب، نقشه جریان ارزش طراحی شد. نتایج نشان داد که کل زمان یک برش کامل در روش استخراج جبهه کار طویل تخریبی در کارگاه استخراج به طول متوسط 100 متر با شیب 35 تا 45 درجه با ضخامت ماده معدنی 90 سانتی‌متر و عرض برش 80 سانتی‌متر به همراه حفر دو عدد گالری نفررو به طول متوسط هر یک 13 متر و حفر دویل اصلی به طول 112 متر و با در نظر گرفتن زمان چوب‌رسانی به طور میانگین 10469 دقیقه بود که 245 دقیقه آن زمان در انتظار بود. بعد از شناسایی منابع اتلاف، ابزار مناسب برای رفع آن پیشنهاد شد. مجدداً زمان سپری شده برای هر اقدام، از زمان شروع تا انتهای هر فرآیند اندازه‌گیری شد. نتایج نشان داد که زمان کل به 8206 دقیقه و زمان انتظار بین فرآیندی به 86 دقیقه تقلیل یافت و مدت زمان کل فرآیند از 22 شیفت کاری به 17 شیفت کاری کاهش یافت.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

The Use of Value Stream Mapping to Improve the Development and Exploitation Section in Non-Mechanized Underground Coal Mines (A Case Study: Eastern Alborz Coal Mines Company)

نویسندگان English

Keramat Ghanbari Teylami 1
mohammad Ataei 2
farhang Sereshki 2
Ali Nouri Qarahasanlou 3
Abbas Barabadi 4
1 Ph.D. Candidate, Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology, Shahrood, Iran
2 Professor, Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology, Shahrood, Iran
3 Postdoctoral Researcher, Department of Engineering and Safety, University of Tromsø, N-9037 Tromsø, Norway
4 Professor, Department of Engineering and Safety, University of Tromsø, N-9037 Tromsø, Norway
چکیده English

Implementing lean production principles in industrial processing units has a direct and significant impact on improving their competitive position and profitability. By reducing production time, achieved through minimizing hidden and apparent losses and streamlining workflows, these units gain valuable time and resources while indirectly lowering product costs. This study aims to identify opportunities for process improvement and optimization in the development and exploitation section of non-mechanized underground coal mines using the Value Stream Mapping (VSM) method in the Eastern Alborz Coal Mining Company. A VSM utilizing lean production tools was then designed to address these inefficiencies. This quantitative research collected data through field measurements, recording the time required for each action from start to finish within the development and exploitation section. Through brainstorming sessions and group discussions with relevant experts, a process map was created and analyzed, and waste sources were identified. The results indicated that the average total cycle time for the development and exploitation section was 10469 minutes, with 245 minutes attributed to waiting waste. After identifying the waste sources, appropriate solutions were proposed. The study concludes that lean production is a practical approach for analyzing processes, enhancing efficiency, reducing waiting times, and maximizing value to improve process flow.

کلیدواژه‌ها English

Lean Production
Value Stream Mapping
Wastes
Development and Exploitation Section
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