The paper presents investigations related to quantification of wear in head ropes of mine drum winders. The loss of metallic area (LMA) of a worn-out rope is determined based on the geometry of the wear and on loss of wire mass. It is then related to the loss of corresponding breaking strength of the rope (LBS). The relation between the two is used to quantify the reliability of various rope condition assessment methods. (C) 2000 Elsevier Science Ltd. All rights reserved.The paper presents investigations related to quantification of wear in head ropes of mine drum winders. The loss of metallic area (LMA) of a worn-out rope is determined based on the geometry of the wear and on loss of wire mass. It is then related to the loss of corresponding breaking strength of the rope (LBS). The relation between the two is used to quantify the reliability of various rope condition assessment methods