Justification of the Disk Tool Application for Working Bodies of Mining Machines

Abstract

The dynamics analysis of coal mining and mine workings in Russia and Kuzbass was made with an assessment of operational productivity and load on fully-mechanized long-walls (FMLW). The article presents statistical data on the average number of FMLW and average monthly productivity of a miner. Disadvantages in the cutters work of working bodies of shearers and tunnelling machines during the mining of seams with a solid rock inclusions were determined. The usage of a disk tool instead of a cutter of working bodies of mining machines at operation at the mining enterprises of Kuzbass was offered in the article. The article recommends to expand the area of application of the mechanical method of coal seams and rocks destruction with a breaking down point of uniaxial compression up to 100 MPa by using a biconic disk tool of working bodies of extracting machines. Shearers’ tractive characteristics during mining of coal seams with rock inclusions, allowing to determine the energy intensity of destruction process by a disk tool were obtained. The options of design implementation of unified attachment points of a disc tool of working bodies of mining machines are presented. It was established that the main advantages of a disk tool over the cutter are the implementation of reversible modes of operation of working bodies, hardening and reducing dust level in face space.

Determination of contact temperature on cutting disc during rock destruction

“…Cutting picks are well proven in the destruction of weak and medium-strength rocks. At the same time, it was proven that when operating mining performs in difficult geological conditions (the presence of solid inclusions and highly abrasive rocks) it is advisable to destroy the rocks using disc cutters [1][2][3][4]. Different types of cutting drums equipped with such tools are shown in the fig.…”