Testing of the resistance towards the cutting of the coal mass by the mechanical means on the example of deposit 'Kostolac'

Ispitivanje otpora prema rezanju ugljene mase mehaničkim sredstvima na primeru ležišta 'Kostolac'

Abstract

  For cutting of the coal mass in the coal mines, in addition to explosive, different machines and devices whose construction has to be adjusted to the working conditions are used. This paper deals with the problems related to the conditions of coal mass cutting and the corresponding resistance based on an examination of a sample from coal basin Kostolac - Field 'Drmno', under different conditions and different shapes and sizes of etalon for cutting (different widths, angles...) varying degrees of blockage (blocked, semi blocked and free) and for different depths of cutting. For the purpose of determining the behavior of coal mass from the point of its destruction by mechanical means, as the most appropriate research method, a method of three-component load measuring on the cutting element during the cutting process was used. Based on the simulation of this process in the laboratory the corresponding equations depending on these influential factors in the process of cutting coal were obtained.