RESEARCH OF INTERACTION OF THE CUTTING TOOL WITH THE COAL MASSIF
Researches on improvement of process of interaction of the cutting tool of mining machines executive bodies with the destroyed massif are relevant now. The purpose of research was to justify geometrical parameters of the cutting tool, schemes of its installation on the advancing expander for drilling wells in coal seams in mines of Kuzbass. The matching of the single cutting tool to the slot-hole scheme of the destroyed massif is made. This scheme provides decrease in the yield of small fractions of coal ω0-1 and ω1-6 that is very important from the point of view of reduction of dust content in the bottom hole zone of the deadlock well. In the course of the bench researches (on the coal block), depth, width of slots, parameters of block, cutting depth, the angle of cutters installation, the form of their forward side were varied. Based on the results of oscillograms processing, the forms of impulses of coal cutting efforts by cutters are determined. Regularities of formation of cutting efforts are defined. Analytical expressions of correlation functions and spectral density are received. It is established that cutters with an asymmetric, wedge surface of the front face provide smaller by 8,3 % total dispersion and by 2,16 times coefficient of exponential fading component in comparison with the cutters having a flat surface of the lip side.