Nghiên cứu đề xuất các phương pháp thiết kế hợp lý cho nhóm lỗ khoan đột phá khi khoan nổ mìn đường lò đào trong đá=Reasearch on and proposal for proper design methods for cut hole group when drilling & blasting roadways in rock

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Ngọc Minh Nguyễn, Thị Ngọc Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí điện tử Khoa học và Công nghệ QUI, 2024

Mô tả vật lý: tr.12

Bộ sưu tập: Metadata

ID: 483261

Thêm vào giỏ

A complete blasting passport usually consists of 3 groups of blastholes: Cut holes, auxiliary holes and contour holes. The cut hole group is the first group which is detonated to create a second free surface on the roadway face and facilitate the detonation of other blasthole groups. The blasthole utilization coefficient (or efficiency) of a blasting passport largely depends on the depth of the detonation of the cut hole group. However, in reality, the the design for the cut hole group in our country has not really been focused on. The designer often chooses the blasting parameters based on experience, sometimes the error is very serious when there is no method and reference parameters for the selection and calculation of an appropriate cut hole group. In this article, based on the synthesis and analysis of the cut hole group using methods used in Vietnam commonly
Some designs have been proposed to meet with different blasting conditions for roadways in rock in underground mining. Finally, based on the theoretical research and the results of the graph analysis, which are obtained by analyzing the data compiled from the practical research, the parameter calculation principle for cut holes designs has been proposed. This is considering as a scientific basis for developing a software which can automatically design drilling & blasting passports in AutoCAD.Một hộ chiếu khoan nổ mìn đầy đủ thường tồn tại 03 nhóm lỗ khoan: đột phá, phá và tạo biên. Nhóm lỗ khoan đột phá là nhóm lỗ đầu tiên được khởi nổ để tạo ra mặt thoáng tự do thứ 2 trên gương lò và tạo điều kiện thuận lợi cho sự phá nổ của các nhóm lỗ khoan khác. Hệ số sử dụng lỗ mìn (hay hiệu quả) của một hộ chiếu khoan nổ mìn đường lò phần lớn phụ thuộc vào khả năng phá nổ theo chiều sâu của nhóm lỗ khoan đột phá. Tuy nhiên, trong thực tế khi thi công, tầm quan trọng của nhóm lỗ khoan đột phá chưa thực sự được đề cao, người thiết kế thường lựa chọn thông số nổ mìn dựa trên kinh nghiệm, đôi khi sai số rất nghiêm trọng khi không có phương pháp và thông số tham chiếu cho việc lựa chọn và tính toán phù hợp cho nhóm lỗ khoan đột phá. Trong bài báo, dựa trên sự tổng hợp và phân tích các phương pháp sử dụng nhóm lỗ khoan đột phá thường sử dụng tại Việt nam
một số thiết kế đã được đề xuất giúp đáp ứng được với sự thay đổi về điều kiện nổ mìn khác nhau cho đường lò đào trong đá trong hoạt động khai thác mỏ hầm lò. Cuối cùng, dựa trên nghiên cứu lý thuyết và kết quả phân tích đồ thị thu được bằng cách phân tích dữ liệu tổng hợp từ nghiên cứu thực tế, nguyên lý tính toán tham số cho các thiết kế lỗ khoan đột phá đã được đề xuất làm cơ sở khoa học giúp phát triển phần mềm thiết kế tự động hộ chiếu khoan nổ mìn trong AutoCAD.

1. Đọc trực tuyến

1. Đọc trực tuyến

Tạo bộ sưu tập với mã QR