Feasibility Study and Technical Report - Pretivm

vehicles and assets can also lead to increased productivity and efficiency by eliminatingtime wasted looking for equipment underground.FIXED PLANT MONITORING AND CONTROLA programmable logic controller (PLC) system will be used for fixed plant monitoring andcontrol. The PLC system processor (main rack) will reside in the portal indoor substation.Remote PLC racks placed near equipment (as necessary) will monitor and control theunderground systems, including, but not limited to:• rock box levels• crusher• conveying equipment• magnet• substations• sumps and pumps• ventilation doors• fuel delivery• traffic control• air quality and quantity.A fiber optic backbone stemming from the portal substation will be used for remoteinput/output racks and Internet protocol network communications. A fiber to coppernetwork switch at the portal substation will connect the fiber backbone. Twoindependent fiber cables will branch out through the portals into the underground accessdeclines, one in the main access decline and one in the conveyor decline. Fiber tocopper switches will be installed at substations and at remote input/output locations,bridging the network together.The PLC system will be tied to the mill and control room on surface using a wirelessantenna to bridge the underground network and the control room networks together.UNDERGROUND STORES DATA MANAGEMENTThe underground stores data management system will use the fiber optic network to linkits assets to a central web server, whereby any computer on the information technologynetwork can access the database.COLLISION AVOIDANCEA proximity detection system will allow drivers to be aware of other vehicles or personnelthat are 60 to 120 m away from their vehicles. This facilitates overall safety in the mine.This system will also integrate with the integrated communications cap lamps.Pretium Resources Inc. 16-66 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC