Bài báo viết đã sử dụng các phương pháp đo, lấy mẫu và phân tích thực tế để xác định mức độ phát thải khí mê tan từ các lò chợ ở các mức khai thác khác nhau của vỉa 7; mối quan hệ giữa thoát khí mê tan và hàm lượng khí mê tan trong vỉa than với sản lượng khai thác của lò chợ được xác định có dạng hàm số y = (x) + b. | Journal of Mining and Earth Sciences Vol. 62 Issue 5a 2021 112 - 118 112 The relationship between mining output and methane of the N010 coal seam in Ha Lam coal mine Nhung Thi Pham 1 Thinh Van Nguyen 1 Hung Nhu Le 2 1 Mining Faculty Hanoi University of Mining and Geology Vietnam 2 Vietnam Mining Science and Technology Association Vietnam ARTICLE INFO ABSTRACT Article history Ha Lam coal mine is exploited from 75 m to -300 m with an output of Received 18th May 2021 million tons year. To meet the production requirements the mine Accepted 28th July 2021 mobilizes 3 coal seams to exploit simultaneously seam 7 seam 10 and Available online 1st Dec. 2021 seam 11 in which seam 10 has the highest methane content among the 3 Keywords seams. Currently Ha Lam coal mine is ranked II in terms of methane. Coal seam 10 However in the mining process of the mechanized longwall there is a Ha Lam coal mine sudden increase in methane release especially at the times when the machine can operate continuously due to favorable geological conditions Methane content of the reservoir and the sudden increase in the thickness of the seam leads Methane release. to a sudden increase in the volume of recovered coal. In order to contribute to ensuring safety in mining be proactive in controlling the methane concentration in the seam 10 mining longwall. The article has studied to determine the relationship between the level of methane emission with the methane content in the coal seam and the mining output of the longwall. These are two factors that greatly affect the methane release process from the longwall. The article used practical methods of measurement sampling and analysis to determine the level of methane release from longwall furnaces at different mining levels of coal seam 10. The relationship between methane release and methane content in the coal seam with the mining output of the longwall has been determined in the form of a function y x b. With each mining level of coal seam
