and engineering journal . ng up to 6,000 ton I i -I. per month of theaverage grade of the mine for practically the cost of lashingand tramming. The idea is to timber the stop< faces in panels, the pigstys bring put in systematically a certain distance apart onthe strike and dip. Where necessary, thej would bethoroughly filled and made solid Winn one knows that allstuff in the pigstys will eventually be recovered, it matterslittle what quantity or how rich the stuff is stowed away. Apanel would consisl of a breaking off line of well-buill solid below, and maintain communicatii i -
and engineering journal . ng up to 6,000 ton I i -I. per month of theaverage grade of the mine for practically the cost of lashingand tramming. The idea is to timber the stop< faces in panels, the pigstys bring put in systematically a certain distance apart onthe strike and dip. Where necessary, thej would bethoroughly filled and made solid Winn one knows that allstuff in the pigstys will eventually be recovered, it matterslittle what quantity or how rich the stuff is stowed away. Apanel would consisl of a breaking off line of well-buill solid below, and maintain communicatii i - for travelling purposi utilation. I pig- stys 8 sible, tie-;, could I studded at the four comi i- and alsof the tope as shown. As the drawn, the fev* pigstye left immediate! ? the old sto pe would be taken out - 1 ly. Thi drawing of the panels would n the night shift. ne expei ienced I imberman working each night wouldhi- abl( to do all the timber drawing in an mine captain secti a \ -hift boss would report when he had a. _ F»c;.2 _ pigstys, say, 12 ft. x 8 ft., and two intermediate lines of8 ft. x 8 ft. pigstys. The distance apart of the packs wouldhe, say, 8 feet on the dip and 4 feet on the strike. Fig. 1shows a stope which has been opened up sufficiently to allowthree complete panels to be put in. When a stope was inthis condition it would be read} for the removal of the middlepanel. There would always be a width of about 11 or 12yards of supported hanging next the face. Being a newdeparture in mining practice, many will look upon it withsuspicion and put it down as unworkable. To go into a stope,which has been worked for a few years, and 300 feet or more panel ready lor drawing, and the drawer would go from -to stope as required. A pigsty would be readibj unkeyed bystope as required. A pigsty would be readily unkeyed byknocking out the wedges and chopping out one of tie. panel would be drawn from the top downwards and keptin a line as shown in Fig. 3, always pres
Size: 2130px × 1173px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
