Grapho-analytical method of analyzing bit life and replacement

Abstract The purpose of this paper was to determine a means of evaluating data obtained from an Eickhoff double drum ranging arm shearer loader. The data included usage of bits, bit holders replaced and bit holders repaired. An analysis was forthcoming to evaluate the anticipated cost of bits and their replacement. This paper was concerned with bit replacements and bit life to demonstrate a technique for determining the efficient use of such a shearer in a coal mine with given geological and technical parameters.