Tóm tắt:

At present, the technology of mining by shearer, the hydraulic props wìth square bar or hìnged bar to exploit thin, gently sloping coal seams have been vvídely applied in countries around the world, especially in China. However, in Vietnam and the mines of Quảng Ninh coal basin, the mining technology for thin, gently sloping seams is still mainly blasting technology. The technology of mining by blasíing for thin seams of underground mines oí the Northeast Corporation basically meets the requirements, but there are still shorícomings that need to be changed. Through practical research on thin seam mining technology in mines in China, the advices from mining experts, results of analyáng the characteristics of geological conditions in some seams of Tây Bắc Khe Chàm coal mine, the paper proposes technology of mining by shearer suitable for thin, gently sloping seam conditions of Tây Bắc Khe Chàm coal mine of 790 Limited Company. After being applied in pracíícal production, this technology has brought about the exploitaíion efficiency, ensuring satety. Since then, the technology of mining by shearer, the hydraulic props with square bar or hinged bar proves that it can be applied to thin, gently sloping coal seams in mines of the Northeast Corporation and underground mines of Quảng Ninh coal basin.