Preparation solutions to improve anti-drift efficiency for complex mechanized equipment in diagonal working face

Abstract

Mechanization of underground coal mining is being widely applied and highly effective in most of the different mine geological conditions in many countries around the world. However, in complex geological conditions, the working face’s length is not large, which is factor that negatively affect the efficiency of this technology. In the process of applying mechanization to exploit the medium thick seams, the slope angle is smooth to inclined with longwall system, when the slope angle changes greatly (from 200 to 350), complex mechanized equipment in the coal mining process often slide downwards along the slope. The paper presents the basis of cutting coal in working face in the diagonal direction with the calculation to determine the actual slope angle of working face in the diagonal direction which is in the dependence on the coal seam slope angle to reduce the working face slope angle in order to limit the influence of the coal seam slope angle on the drifting of the complex mechanized equipment in the working face in the medium thick coal seams with sloping to inclined slopes.