Feasibility Study and Technical Report - Pretivm

JUMBOSEach jumbo can support 150 to 160 m/mo of development. Four jumbos will berequired to meet the peak scheduled advance.LHDSUp to five diesel LHDs will be required to move the blasted material from the variousdevelopment headings and from the mass excavations. The contractor will provide threediesel units for this period as the electric LHDs planned for the production phase will nothave the flexibility of movement required during the pre-production phase.TRUCKSThree 40 t trucks will provide adequate haulage capacity for pre-production activities.BOLTERSDemand on bolting during pre-production development will be higher than duringproduction as development peaks during this time. Both bolters required for productionwill be brought on line during this phase to provide the contractor with bolting capacity.CABLE BOLTERCable bolting will not be required in the stope undercuts during pre-productiondevelopment as few will be excavated. However, there will be a need for cable bolting inthe shop excavations and in all of the intersections. A single cable bolter will be sufficientto handle this load, with any excess bolting being handled manually.SHOTCRETE SPRAYERSIt is anticipated that 10% of all development over the LOM will require shotcrete. Theentire workshop and crusher area will also require shotcrete. One shotcrete sprayershould be of sufficient capacity to meet the expected volume; however, a second unit isplanned in the interest of ensuring capability for this critical task.TRANSMIXERSTwo transmixers will be required to transfer the expected volume from the surface batchplant to the sprayers underground, to ensure no shotcreting delays.LONG HOLE DRILLSA long hole drill will be required for the crusher excavation, drop-raising of the fresh airraise to advance the VOK ramp, and early slot development in the VOK upper block. Thedrill may also be employed to drill cable bolt holes if the cable bolter is unavailable.16.7.2 PRODUCTION PHASEPretivm will supply all equipment during production with the exception of Alimak raiseclimbers, which will be included in the raising contracts. Table 16.12 lists the requiredequipment for development, stoping, and support activities.Pretium Resources Inc. 16-40 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC