Testing rig for experimental study of the mechanical rock cutting

Abstract

This paper presents some problems as for the characteristics experimental determination when mechanically cutting coals and rocks. The booth for cutting heterogeneous material, dedicated to the determination of specific resistances when cutting the lignite and sterile rocks is consisted of an hydraulic shaper model 7310D, a strain dynamometer used for the measure ment of the stressin the dipper tooth, the standard dipper tooth, the sample of lignite or rock, the installation for remaking and registering experimental data, and the electrical power plant and central of fice, both needed for electrical supplying and commanding the booth. The booth provides the existence of cutting forces with values between 5000...28000 N, cutting rate from 0,05 m/s up to 0,8 m/s and a 1000 mm forward motion. Also the set of standard dipper teeth allows avariation of the front rake angle between 10 and 50° and simulation of the dipper tooth abrasive wear. The working table allows using a test sample having the maximum size of 600x500x400 mm.