Laboratory research on the influence of selected technological parameters on cutting forces during hard rock mining with asymmetric disc tools

excavation methods is the possibility of the disc tools usage in new
constructions of mining machinery. For many years, such research
on the excavation using both symmetrical and asymmetrical disc
tools has been conducted in the Department of Mining, Dressing
and Transporting Machines in the AGH University in Cracow. The
primary effect of these tests is an innovative solution of a mining
head with complex motion trajectory asymmetrical disc tools. The
concept of the disc head assumes the mining of rock stone by
chipping as a result of a complex trajectory of disc tools. To
develop such innovative construction of roadheader head,
determination of work principles and guidelines based on laboratory
tests was necessary. The article presents the methodology, course,
and results of the disc tools mining tests. Those studies included
quasi-static and dynamic experiments of excavation using disc
tools. In this paper constructions of specially prepared laboratory
stands for the examination of disc tools of complex trajectory were
presented. Each trial has been performed for different physical
properties of rock samples and different excavation technology. The
conducted research significantly broadens the scope of knowledge
in the field of mining with asymmetrical disc tools. The results of
tests described in the paper could be used in the construction of
innovative machines and devices for mechanical hard rock mining,
in opposition to classical mining methods involving explosive
materials.