بررسي عوامل ناپايداري شيرواني مشرف بر نوار نقاله مجتمع مس سونگون و پايدارسازي آن

Evaluation of Instability Factors of a Slope of Overlooking Conveyor-Belt System in Sungun Copper Complex and Its Stabilization

در سال 1385 خشي از شيرواني مشرف به نوار نقاله و سنگ‌شكن معدن مس سونگون ريزش كرده و ساختمان هاي بالاي آن دچار جابه‌جايي و شكست شده است. با توجه به اهميت كاركرد بي عيب نوار نقاله و سنگ‌شكن به‌منظور تداوم در توليد، ويژگي‌هاي زمين‌شناسي ساختماني و مهندسي منطقه بررسي شده و وضعيت موجود شيرواني به لحاظ پايداري ارزيابي شد. نتايج ارزيابي ها نشان داد كه شيرواني اطمينان كافي در مقابل لغزش را ندارد و ناپايداري آن باعث آسيب ديدن يا از بين رفتن نوار نقاله و تونل آن خواهد شد. بنا بر اين، با توجه به شرايط فني و اقتصادي، روش اصلاح هندسه شيرواني، به‌همراه تلفيقي از ساير روش‌ها، به‌عنوان راه‌كار پايدارسازي بخش بالاي نوار شيرواني انتخاب‌ مي‌شود. هم‌چنين پيشنهاد مي‌شود كه در بخش زير نوار نقاله نيز بايد از ديگر روش‌هاي پايدارسازي استفاده گردد.

A slope overlooking conveyor-belt system in Sungun copper mine complex has been downfall in 2006 and the buildings located on the upper part of the slope has been moved and destructed. Since the conveyor-belt system is an important part of the production process that transports excavated material from original stock to the rock-crusher equipment and to have continuous and firm production in the mining process, this slope must be stable during exploitation period safely. For this purpose, in this paper, first the structural and engineering geology of the area was studied and then the stability risk analysis is performed on the slope. According to the results of the stability analyses, the slope may be unstable against slip and probable instability may lead to damage or destroy conveyor-belt and its tunnel. Therefore, considering technical and cost conditions, slope geometry modification method with incorporation of the other methods are suggested to stabilization the part of slope above conveyer belt. In addition, in the part of slope under conveyor-belt it is suggested to use other slope stabilization methods.