Contiguous coal seam mining using powered systems in terms of lvov-volyn coal field mines

The monograph is devoted to the problems of substantiation of the parameters for contiguous coal seam extraction using powered systems under complex mining and geological conditions. Rational parameters (strength and geometrical parameters of a powered support, allowable distance between stopes within contiguous seams, shearer feed rate, longwall advance rate) for stoping operations in Lvov region mines are determined. Recommendations as for the parameters for contiguous seam extraction in terms of both overworking and underworking are given.