Research on the possibility of applying mechanism technology to coal mining in complex geological conditions at underground mines in Quang Ninh region

Abstract

The article evaluates the possibility of applying mechanized mining technology (CGH) to underground coal mining in areas with complex geological and technical conditions in Quang Ninh. Through analyzing the characteristics of coal seams such as: coal, soft and weak wall/pillar rocks, large seam slope angles, strong tectonic destruction levels and small-scale mining areas, the study determined that the total reserves that can be applied with CGH are about 231.5 million tons (accounting for 34.6% of the total reserves). The research results propose a number of CGH models suitable for each geological and technical condition of the mine, at which time the mining output can increase from 4.3 to 9.3 million tons/year, raising the proportion of CGH mining to about 29%.