tailieunhanh - Dự báo độ chứa khí mêtan trong các vỉa than khai thác từ -250 m đến -400 m của mỏ than Mông Dương

Bài viết đã đưa ra những dự báo độ chứa khí mê tan của mỏ than Mông Dương ở các độ sâu khác nhau. Bài báo đã xây dựng biểu đồ dự báo độ chứa khí mê tan khi khai thác xuống sâu dựa trên phương pháp bình phương nhỏ nhất của phần mềm Excel. | Journal of Mining and Earth Sciences Vol. 62 Issue 5a 2021 76 - 84 76 Forecast methane content in coal seams from -250 m to -400 m of Mong Duong coal mine Thinh Van Nguyen 1 Hung Phi Nguyen 1 Thang Viet Nguyen 1 Khaosay Vilayheuang 2 Duc Trung Ngo 3 1 Mining Faculty Hanoi University of Mining and Geology Vietnam 2 Vietnam National Coal Mineral Industries Holding Corporation Limited Vietnam ARTICLE INFO ABSTRACT Article history Methane is considered to be the most dangerous gas in underground Received 10th Apr. 2021 mining coal mines and is particularl especially dangerous for mines Accepted 30th July 2021 ranked high in methane such as Mao Khe Quang Hanh Khe Cham Mong Available online 1st Dec. 2021 Duong. Mong Duong coal mine is tending to exploit down to -400 m and Keywords will zone mining areas in 2022 which means that the methane content in Coal seam the coal seams also tends to increase with the mining depth especially for Methane the level below -250 m of Mong Duong coal mine where has relatively complicated geological conditions and very limited methane exploration Mong Duong coal mine works. In order to have effective preventive measures to avoid methane Quang Ninh. gas explosions the paper has made predictions for the methane storage capacity of Mong Duong coal mine at different depths. The paper has built the prediction chart of methane concentration when exploiting deeply based on the least squares method of Excel software. From there the forecast data of methane content in coal seams from the current mining depth to -400 m level of Mong Duong coal mine. The forecast results of the methane content in coal seams at -400 level of Mong Duong coal mine are markedly increased compared to the current exploitation level especially at I12 with increased methane content in the coal seam maximum reached . The methane content in reservoir I-12 is shown by the equation y . The results of the prediction of methane content make it easier to