Multi-HV cable install in production shaft<\/h1>\n


IME Consultants (IMEC) is pleased to announce the successful completion of a high voltage cable installation project near Mt Isa, Queensland. A total of four 240mm2 cables were successfully installed within a 960m deep production shaft terminating at substations located off various levels in the shaft to contribute to a site wide HV upgrade project.<\/p>\n

The cables were installed within the active production shaft, serving as a huge challenge to not only coordinate the scheduling of the installation works with the mining production requirements, but also to safely gain access and space within the shaft.<\/p>\n

IMEC have established a solid relationship with Murray Engineering Pty Ltd (Principle Contractor) through the provision of engineering support across a number of their other successfully completed cable installation projects which most notably includes the Gwalia Deeps HV Installation in Leonora W.A. completed in 2013, which is considered to be the deepest single point suspended cable install in Australia at 1370m.<\/p>\n


Murray Engineering Pty Ltd (MEPL) appointed IME Consultants to provide support to the project with developing a methodology, installation equipment and materials design and specification, procurement support and finally onsite construction technical support.<\/p>\n

The project was broken down into 3 key phases; \u2018phase 1\u2019 was to install permanent wall brackets to the shaft wall which cable clamps would be later affixed to. \u2018Phase 2\u2019 would constitute the lowering of the cables down the shaft and then finally \u2018phase 3\u2019 was to install the lowered cables on to permanent wall brackets installed to the shaft wall.<\/p>\n


The cables were large 240mm2 copper XLPE insulated cables required to transmit 11kV of electrical power down the shaft and into the various sub-level substations. There were four separate cable installations with each cable being lowered from the surface collar area.<\/p>\n

IMEC designed a specialised skid based sheave arrangement that would fit into a recess between the headframe structural bracing and allow the lowering catenary support wire rope to be deflected accurately into the compartment within the shaft where the cables would be installed. The skid based arrangement also provided for a safe work deck for workers to clamp and fix the HV cable onto the supporting catenary wire rope. This skid would be fitted with handrails designed to Australian standard ensuring the workers would be safely protected whilst working next to the open hole.<\/p>\n


The skid arrangement enabled full Non-Destructive Testing of all equipment to be carried out prior to mobilising to site, negated the need for a crane for installation (which would be typically used) and provided a safe work area for MEPL employees throughout the lowering at the shaft collar.<\/p>\n

An MEPL developed custom cable clamp was used to fix the cables to the catenary wire rope for lowering the cable into the shaft. The cables were then transferred from the catenary wire rope to wall brackets which were designed by IMEC for the permanent cable support. All of which was designed in accordance with the applicable Australian Standards and the site specifications.<\/p>\n


Strict QA\/QC was carried out during the installation of all equipment including anchor pull testing, MPI of fabricated item welds, conformance testing\/inspection of equipment and material certificates for procured items. The strict conformance of all items was both prudent for the safety of persons and client equipment along with Mining Regulations.<\/p>\n

The successful completion of this project marks a significant achievement for both IMEC & MEPL in demonstrating their industry leading capabilities for not only delivering projects of this nature, but also the technical & management skill sets of their experienced staff.<\/p>\n"]