Maintaining shaft access and services during headframe replacement

CIM Bulletin, Vol. 84, No. 954, 1991

R.B. Smith, NERCO Con Mine Ltd., Yellowknife, Northwest Territories, and D.C. Brady, J.S. Redpath Mining Consultants Ltd., North Bay, Ontario

A review of the major renovation of the fifty-year old C-l headframe facilities at NERCO's Con Mine, Yellowknife, N. W. T. is provided. The project was complete with only two 3-day shutdowns of the facility. Work consisted of four major phases: structural reinforcement of the adjoining mill building prior to dismantling; relocation of virtually all mine and mill utilities which transited the headframe collar en route from the adjacent powerhouse; dismantling of the entire headframe facility and portion of the mill building, including the removal of asbestos siding; and erection of a new head-frame, idler rower, collarhouse and mill wall. This paper describes the work and methods used by NERCO, J.S. Redpath Mining Consultants Limited, Acres International Limited, and others to bring the project to a successful completion. The history of the project is discussed from the planning phase through construction, including; design, procurement, and construction scheduling. The paper discusses the unique elements of the project, the problems encountered, and the methods used to achieve success.
Keywords: Maintenance, Equipment, Headframes, Con Mine, NERCO Con Mine Limited.