Đặc đıểm quặng hóa và mạng lướı thăm dò Urani khu vực Khe Hoa

Đặc đıểm quặng hóa và mạng lướı thăm dò Urani khu vực Khe Hoa – Khe Cao, tỉnh Quảng Nam

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Tác giả: Quyết Tâm Lê, Phương Nguyễn, Trường Giang Nguyễn, Lê Châu Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

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

Mô tả vật lý: tr.63

Bộ sưu tập: Metadata

ID: 380252

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According to the investigation and assessment results of the Federation of Radiation and Rare Geology, the Khe Hoa - Khe Cao area is an area with industrial prospects for uranium ore in sandstones, which needs investment in exploration and mine development. Therefore, research to contribute to clarifying mineralization characteristics and orienting the uranium exploration network in the Khe Hoa - Khe Cao area is necessary. This article introduces some new research results based on the combination of traditional geological methods and statistical methods, combining structural function analysis. The research results achieved are as follows: The uranium ore bodies in the area have a relatively complex structure, the ore bodies are seam-shaped, the lens seams are pseudo-congruent with the surrounding rocks, and the angle of insertion is gentle
The scale of ore bodies is small to medium. The average uranium content in ore bodies ranges from 0.027% to 0.073%, distributed unevenly to very unevenly (Vc = 86.0% to >
100%), belonging to the poor ore category. Based on the level of difficulty in exploration work, the research area is classified as exploration mine group III, requiring exploration to establish mining investment projects to reach level 122 reserves. To explore to meet the requirements for calculating reserves at level 122 for uranium ore bodies in the Khe Hoa - Khe Cao area, it is most reasonable to use a network of parallel lines, combined with odd fans, with distances between lines. drilling 50 - 60 m, drilling works on the route 25 - 30 m, surface works (wells) 25 - 30 m apart.Theo kết quả điều tra đánh giá của Liên đoàn Địa chất Xạ - Hiếm, khu vực Khe Hoa - Khe Cao là diện tích có triển vọng công nghiệp về quặng urani trong cát kết, cần được đầu tư thăm dò phát triển mỏ. Vì vậy, việc nghiên cứu nhằm góp phần làm sáng tỏ đặc điểm quặng hóa và định hướng mạng lưới thăm dò urani khu vực Khe Hoa - Khe Cao là cần thiết. Bài báo giới thiệu một số kết quả nghiên cứu mới trên cơ sở áp dụng phối hợp phương pháp địa chất truyền thống với phương pháp toán thống kê, kết hợp phân tích hàm cấu trúc. Kết quả nghiên cứu đạt được như sau: Các thân quặng urani trong khu vực có cấu trúc tương đối phức tạp, thân quặng dạng vỉa, vỉa thấu kính nằm giả chỉnh hợp với đá vây quanh, góc cắm thoải
quy mô các thân quặng thuộc loại nhỏ đến trung bình. Hàm lượng urani trung bình trong các thân quặng từ 0,027% đến 0,073%, phân bố không đồng đều đến rất không đồng đều (Vc = 86,0% đến >
100%), thuộc loại quặng nghèo. Dựa vào mức độ gây khó khăn trong công tác thăm dò, thì khu vực nghiên cứu được xếp vào nhóm mỏ thăm dò III, yêu cầu thăm dò phục vụ lập dự án đầu tư khai thác mỏ phải đạt được trữ lượng cấp 122. Để thăm dò đạt yêu cầu tính trữ lượng ở cấp 122 cho các thân quặng urani khu vực Khe Hoa - Khe Cao, hợp lý nhất là sử dụng mạng lưới dạng tuyến song song, kết hợp dạng lẻ quạt, với khoảng cách giữa các tuyến khoan 50 - 60 m, công trình khoan trên tuyến 25 - 30 m, các công trình trên mặt (hào, giếng) cách nhau 25 – 30 m.

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