and engineering journal . smuch to be desired; instead of being a facility provided bythe managi mi ai for the removal of thia hindrance and obstruction. The construction of a good stope box connotes that theexcavation where the box is to be ereeted must be of ampledimensions. The slope boxes should beand dimension:—the pieces should be interch _ and I gether, the members could be made on the surfaceexcepting the bearers < r legs, they can be easily assembled,and when required nearer the stope face can be pulled dand re-erected. The size of a stope box is somewhat determined by th
and engineering journal . smuch to be desired; instead of being a facility provided bythe managi mi ai for the removal of thia hindrance and obstruction. The construction of a good stope box connotes that theexcavation where the box is to be ereeted must be of ampledimensions. The slope boxes should beand dimension:—the pieces should be interch _ and I gether, the members could be made on the surfaceexcepting the bearers < r legs, they can be easily assembled,and when required nearer the stope face can be pulled dand re-erected. The size of a stope box is somewhat determined by thesize of the kokopan. The ordinary mine ear is 40 in36 in., and stands 42 in. high on rail. Your box has gdischarge into this space and without spillage. To ensurethis some designers taper the boxes, the height ot sides 36in., above which should be a strong brow-piece bithrough the stull pieces; this gives strength and rigidity tothe structure. A double-box e, aitaining above featwould be a potent factor in reducing working costs. Another View Underground on a Rand Mine. The principle of the Kimberley chute could beintroduced in the stope box in this manner, that behindthe stopping boards the deals should extend far enough tohold a load to,- the ordinary mine car, below the stoppinboards the floor of the box sh mid extend far enough to proVide space tor spillage to be lashed back into the box. and thus providing against fouling of the track. To avoid theboxes being damaged 1>\ blasting, a good plan i- to leav -sullicicnt stuff in and around the boxes to act a- a shieldagainst Lying rocks, The angie of the floor of the boxshould be about 25 degrees; this provision prevents theentiii weight of the column ol oi< pressing on the stoppingboards, this will allow the boards being easily opened andclosed* At will, cither box could be used as a waste box. ifit is desired to sort in the -tope. The waste could be usedfor pigstyes and walling up the drives, as then are nopillars. T
Size: 1933px × 1292px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
