Nghiên cứu lựa chọn biên giới khai thác lộ thiên hợp lý cho Mỏ đồng Tả Phời dưới góc độ kinh tế tuần hoàn

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Tác giả: Ngọc Thanh Đặng, Đức Phương Lê, Xuân Tráng Phạm, Trung Kiên Phí

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Công nghiệp Mỏ, 2024

Mô tả vật lý: tr.45757

Bộ sưu tập: Metadata

ID: 461855

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In the realm of mining, the quest for optimal extraction of precious mineral resources has always been the focal point of open-pit boundary selection. Tả Phời copper mine, a quintessential example, garners particular attention due to its distinctive copper reserves distribution. This study introduces a novel approach to open-pit boundary selection, transcending conventional practices by adopting a circular economic perspective. By encompassing the entire mining lifecycle, from extraction to refinement, the study aims to establish an economically justified open-pit boundary for Tả Phời copper mine. The research entails the development of various pit bottom scenarios, where three scenarios were meticulously studied for selection purposes. Furthermore, a fourth scenario was developed to estimate potential boundary expansion. The key components of the study are the volumetric evaluation of ore deposits, the creation and in-depth analysis of pit operation diagrams (PODs) pertinent to the chosen scenarios, and the calculation of the stripping ratio using two different methodologies: the conventional ore-grade-based method and the end-product-oriented method, both from a circular economic perspective. The study's findings affirm the imperative of adopting a circular economic perspective in delineating open-pit boundaries. By employing this methodology, the optimal pit bottom for Tả Phời Copper Mine is established at +80 m. This novel insight distinctly contrasts with the prior boundary determination of +110 m by the 2013 Institute of Mining Science and Technology - Vinacomin (IMSAT) project. This redefined boundary not only amplifies raw copper ore production by almost 500,000 tons, contributing substantially to the mining enterprise's revenue in billions of VND but also reveals the latent potential by almost 1.6 million tons of 333-grade ore, thus fostering future growth prospects. This research not only underscores the significance of a circular economic perspective in open-pit boundary selection but also accentuates its broader significance in sustainable resource management and economic growth.Trong lĩnh vực khai thác mỏ, lựa chọn biên giới khai thác lộ thiên luôn tập trung vào khai thác tối đa hiệu quả các khoáng sản quý giá. Mỏ Đồng Tả Phời, là một ví dụ điển hình, đáng được quan tâm đặc biệt vì sự phân bố của trữ lượng đồng. Nghiên cứu này đưa ra một phương pháp tiếp cận mới trong việc lựa chọn biên giới khai thác lộ thiên, vượt xa các phương pháp truyền thống bằng cách xem xét dưới góc độ kinh tế tuần hoàn. Bằng cách xem xét toàn bộ chu kỳ khai thác mỏ, từ khâu khai thác đến luyện chế biến, nghiên cứu này nhằm xác định biên giới khai thác lộ thiên có tính kinh tế hợp lý cho mỏ đồng Tả Phời. Nghiên cứu này bao gồm sự phát triển của các phương án đáy mỏ khác nhau, trong đó có ba phương án đã được nghiên cứu cặn kẽ để lựa chọn. Ngoài ra, một phương án thứ tư được xây dựng để dự đoán biên giới triển vọng. Điểm chính của nghiên cứu bao gồm việc đánh giá khối lượng quặng, xây dựng và phân tích biểu đồ chế độ công tác mỏ có liên quan đến các phương án được chọn và tính toán hệ số bóc giới hạn bằng hai phương pháp khác nhau, đó là phương pháp dựa trên quặng tinh truyền thống và phương pháp dựa trên sản phẩm cuối cùng theo góc độ kinh tế tuần hoàn. Kết quả của nghiên cứu xác nhận sự cần thiết của việc áp dụng mô hình kinh tế tuần hoàn khi xác định biên giới khai thác lộ thiên. Bằng cách sử dụng phương pháp này, vị trí đáy mỏ tối ưu của mỏ đồng Tả Phời được xác định tại +80 m. Khám phá thông tin mới này đáng chú ý khác biệt so với việc xác định biên giới trước đó là +110 m theo dự án do Viện Khoa học Công nghệ Mỏ - Vinacomin (IMSAT) lập năm 2013. Việc xác định lại biên giới này không chỉ tăng trữ lượng quặng đồng nguyên khai quy đổi gần 500.000 tấn, góp phần làm lợi hàng chục ngàn tỷ đồng cho doanh nghiệp mỏ, mà còn hé lộ tiềm năng gần 1,6 triệu tấn quặng cấp 333, tạo ra triển vọng tăng trưởng trong tương lai. Nghiên cứu này không chỉ chứng tỏ tầm quan trọng của góc độ kinh tế tuần hoàn trong việc lựa chọn biên giới khai thác lộ thiên mà còn nhấn mạnh tới tầm quan trọng rộng hơn đối với quản lý tài nguyên bền vững và tăng trưởng kinh tế.

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