September 15, 2017
A mine’s network of haul roads can either be its greatest asset or its greatest liability. The path to safe and efficient haul road operations begins with understanding what friction is, being able to measure it and knowing how to manage it. A haul road that is dusty when it is dry can become extremely slippery and dangerous due to rain or when sprayed with water to suppress the fugitive dust. Two independent friction concepts are required to effectively manage haul road safety and maintain competent haul road operations: Friction Supply is the available friction where vehicle tyres meet the haul road surface. Typically, when water is applied to haul roads (rain or by water cart to suppress fugitive dust) the friction supply value will decrease by varying amounts. Quality coarse haul road…