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sets with back and side lagging instal led. In the more competent ground, <br /> rock bolts with steel mats will be the more prevalent ground support system. <br /> When the decline bottoms out on the ore horizon (approximately one year) , <br /> development drifting will continue in the general direction of the ventilation <br /> bore hole location and then continue on into the ore body. <br /> Mining <br /> Once the development has progressed into the ore body, the ore will <br /> be mined by a modified room-and-pillar system. This method is very <br /> similar to that presently being used throughout the Uravan Mineral Belt, <br /> i .e. leaving ore and waste pillars wherever necessary and installing rock <br /> bolts and steel mats for roof support. <br /> Ore thickness in some areas will be too thin to carry the full <br /> height of the heading so a method called "split shooting" will be used. <br /> This involves removing the waste first by drilling, blasting and mucking, <br /> and then repeating the process for the ore. <br /> Ventilation <br /> During the driving of the..decline and the development drift to the <br /> ventilation bore hole location, fresh air will •be delivered by a surface <br /> fan to the working face via a ventilation tube. After the ventilation <br /> bore hole is upreamed, secondary ventilation systems will be established <br /> as required for the stopes and development headings. <br /> Levels of radon daughter concentrations will be monitored and records <br /> kept in accordance with MSHA regulations. In addition, the ventilation <br /> -5- <br />