Nghiên cứu tính khối lượng xúc bốc tại mỏ lộ thiên từ đám mây điểm 3D thành lập bằng ảnh máy bay không người lái=Study on calculating the excavation volume at open-pit mines using 3D point cloud generated from UAV imagery

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Tác giả: Văn Cảnh Lê, Quốc Long Nguyễn, Đình Trọng Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học công nghệ xây dựng (Đại học Xây dựng Hà Nội), 2024

Mô tả vật lý: tr.92-101

Bộ sưu tập: Metadata

ID: 239940

Thêm vào giỏ

Currently, the calculation of excavation volumes in open-pit mines using unmanned aerial vehicle (UAV) data, where cross-sections are generated by establishing from the Digital Surface Model (DSM), and subsequently computing excavation volumes as prescribed by TCVN 10673:2015. This approach reduces the accuracy of the collected surface data, while also consuming considerable time for accurate terrain digitization from the DSM and cross-section generation, thereby introducing errors in this process. To address these limitations, this study employs 3D point clouds derived from UAV imagery to compute excavation volumes. Additionally, to assess the accuracy of this method, test data consists of a terrain model designed to mimic the terraced morphology of actual open-pit mines for excavation volume calculations using mathematical (TH), cross-sectional (MC), and 3D point cloud (PC) methods. The results reveal a deviation of 0% between TH and MC, and 0.03% between TH and PC. Practical volume calculations at Cọc Sáu coal mine exhibit a 1.3% discrepancy between MC and PC methods. Thus, direct excavation volume calculation on the PC point cloud model fully meets the technical requirements according to TCVN 10673:2015. The research outcomes also contribute to affirming the effectiveness of UAV technology in data collection at open-pit mines, ensuring the completion of tasks that require high precision.Hiện nay, trong tính toán khối lượng xúc bốc tại các mỏ than lộ thiên sử dụng ảnh máy bay không người lái UAV, mặt cắt được thành lập từ mô hình số bề mặt DSM, sau đó mới tính toán khối lượng bằng phương pháp mặt cắt theo TCVN 10673:2015. Cách tính toán như vậy không hiệu quả về thời gian, và làm giảm độ chính xác bề mặt thu thập được. Với mục đích khắc phục nhược điểm trên, nghiên cứu này ứng dụng đám mây điểm 3D để tính khối lượng xúc bốc. Để đánh giá độ chính xác của phương pháp, dữ liệu kiểm nghiệm là mô hình địa hình được thiết kế dưới dạng tầng bậc tương đồng với bờ mỏ lộ thiên thực tế để tính toán khối lượng xúc bốc theo phương pháp toán học (TH), mặt cắt song song (MC) và đám mây điểm 3D (PC), kết quả cho thấy độ lệch TH-MC là 0% và TH-PC là 0,03%. Tính toán thực tế khối lượng xúc bốc tại mỏ than Cọc Sáu cho thấy độ lệch MC-PC là 1,3%. Như vậy, tính khối lượng trực tiếp trên mô hình đám mây điểm PC hoàn toàn đáp ứng được yêu cầu của TCVN 10673:2015. Kết quả nghiên cứu cũng góp phần khẳng định hiệu quả của công nghệ UAV trong thu thập dữ liệu tại các mỏ lộ thiên, đảm bảo các công việc yêu cầu độ chính xác cao.

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