Bài viết đã nghiên cứu, phân tích, đánh giá kỹ điều kiện địa chất - mỏ, đặc điểm công nghệ khai thác, đo đạc xác định nồng độ bụi, nhiệt độ, độ ẩm,tốc độ gió tại các gương lò và đề xuất các giải pháp áp dụng phù hợp nhằm giảm thiểu lượng bụi phát sinh, cải thiện điều kiện vi khí hậu (nhiệt độ, độ ẩm và tốc độ gió) tại các lò chợ cơ giới hóa. | 54 Journal of Mining and Earth Sciences Vol. 62 Issue 5a 2021 54 - 61 Research solutions to reduce dust concentration at the VM - L 7 - 1 mechanized longwal of the Mong Duong coal mine Nhan Thanh Thi Dinh 1 Thinh Van Nguyen 1 Manh Cuong Le 2 1 Faculty of Mining Hanoi University of Mining and Geology Vietnam 2 VietNam National Coal - Mineral Industries Holding Corporation Limited Vietnam ARTICLE INFO ABSTRACT Article history Mong Duong coal mine is currently exploiting from m to -250 m with Received 28th Mar. 2021 an output of million tons year of which million tons are from Accepted 19th May 2021 longwall mining and 100 thousand tons from dig tunnel in coal. To meet Available online 01st Dec. 2021 the production requirements of the mine 5 blasting longwall have been Keywords mobilized with a total output of million tons year and 1 mechanized Dust concentration longwall with an output of 350 000 tons year. At the mechanized Mechanized longwal longwall VM - L 7 - 1 of Mong Duong coal mine after the time of putting into use there was dust concentration exceeding the allowable limit Mine dust according to QCVN 05 2013 BTNMT. The article has researched MongDuong coal mine. analyzed assessed geological - mine conditions mining technology characteristics dust concentration temperature humidity and wind speed at furnace mirrors and proposed suitable solutions to minimize dust generation improve microclimate conditions temperature humidity and wind speed at mechanized longwall. The solution selected and applied is the mist spraying at the mechanized longwall VM - L 7 - 1. After applying the solution in practice it has brought effective results minimized dust concentration in all working stages of the mechanized kiln VM - L 7 - 1. The applied results show that the dust concentration is within the allowable limit according to QCVN 05 2013 BTNMT dust concentration in production stages decreased from to . Copyright 2021 Hanoi University of Mining
