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<br />I ^ <br />^ <br /> <br />i~ <br />^ <br />MINING <br />The principal mining methods used at the Sunnyside Mine are <br />shrinkage stoping, overhand cut and fill stoping, open back cut <br />without fill, and sublevel long hole stoping. <br />Shrinkage Stopinq <br />Shrinkage stoping consists of <br />preparation, stoping and free pull. <br />preparations are used, depending <br />removed from the stops by using a <br />lateral with cross-cu t. pockets. <br />three distinct phase:;: stops <br />Two different type:: of stops <br />on whether the ore will be <br />slasher scram or a sill level <br />The slasher scram type shrinkage stops is prepared by <br />driving three raises 30 feet up from the track level, qne raise <br />fs situated in the center of the block approximately 150 feet on <br />either side of the center. At the top of the center raise, dog <br />holes are driven a short distance along strike in both <br />directions. Fingers are raised from the track level on either <br />side of the center raise to connect with the dug holes. <br />Twenty-five hp slashers are then set back to back at the top of <br />the center raise so that they can slush to the fingers. <br />- 11 - <br />