Affiliation:
1. Department of Mining Engineering, University of Mines and Technology, Tarkwa, Ghana
Abstract
Surface mining operations depend critically on the durability and performance of haul truck tyres, as achieving optimal operational hours directly influences cost-effectiveness and productivity. This study delves into the causes of premature tyre failures, which prevent mining companies from reaching their operational targets. Among the most frequent types of tyre damage are bead damage, separation, punctures, heat separation, impacts, liner, tube, or rust band failures, radial cracks, and failures due to repairs. Additional issues include seized brakes, shoulder and sidewall cuts, tread chunking, and tread cuts, as well as wear from normal operations. To systematically identify and analyse these failures, the study employed the Supervisor-Field Engineering Approach (S-FEA) during the period from January 2020 to December 2020. The findings indicate that the predominant causes of significant tyre failures are multifaceted, including poor underfoot conditions, presence of water, operator negligence, and incorrect tyre inflation. Other critical factors contributing to tyre deterioration are excessive heat generation, and mechanical stress such as spinning, skidding, or sliding. Additionally, external factors such as rocks becoming lodged between dual wheels, underinflation, and overloading were identified as contributing to tyre failures. The study strongly recommends that mining operations adhere to the specified Ton Mile Per Hour (TMPH) ratings, which are designed to optimize tyre performance by matching tyre capabilities with the operational demands. By adhering to these guidelines, mines can enhance tyre longevity, reduce downtime due to tyre failures, and ultimately achieve a more efficient and cost-effective mining operation. This approach not only addresses immediate operational challenges but also contributes to sustainable mining practices by reducing waste and increasing the reuse of resources.