An engineered approach to conveyance inspection and repair

CIM Bulletin, Vol. 87, No. 984, 1994

R. De Ruiter, Wabi Iron & Steel Corp., New Liskeard, Ontario

In times when mines are emphasizing cost reductions, a properly rebuilt shaft conveyance can be more cost-effective than building a new unit. A wareness of the safety aspects of conveyance design along with proper maintenance play a large part in reducing operating costs. A knowledgeable operator can maintain a high level of safety and significantly lengthen the service life of a conveyance. Such an operator is also in a better position to determine when a major overhaul is necessary. After the decision has been made to rebuild, operators must decide who will do the overhaul. Whether the work is to be done in-house or contracted out, the goal is to achieve a conveyance recertified to "as new" condition. By dealing with conveyance rebuilds as an engineered product, operators can be certain they are getting a top quality product jor their money. This paper deals with the engineering aspects of conveyance rebuilds. Actual examples of typical problems are discussed and corrective action outlined. Design considerations such as proper material selection, component fatigue due to cyclic loading, effects of stress concentrations and corrosion are all part of the initial design considerations that must carry over into the rebuild process. All too often equipment overhauls are done by people who are not experienced in conveyance design. As a manufacturer of mining equipment, Wabi has gained expertise over the past 70 years. By sharing this knowledge the company hopes to create a safer work environment and help to reduce operating costs.

Keywords: Maintenance, Inspection processes, Equipment.