Relocation schemes of picks with cutting, coupling and group cuts on shearer cutting drums

The possibilities of increasing the efficiency of separating coal from the massif by improving the pick alignment schemes of shearer cutting drums are considered. Given the existing structural limitations of the radial extension of the picks and the thickness of the cuts, an increase in efficiency is achieved by using combined series-group schemes for arranging picks, including energy-efficient cutting, paired and group with a larger cross-sectional area of the cuts and, therefore, with a larger particle size of the separated coal fragments, reduced dust yield and specific energy consumption. (paper)