Transactions . cor- rse, gto the the aJU o225 S 71 •J iiI. Profile, General Workings. LoNGWALL Mining and Emery Pit—Burland of seam. 50 feet up this cross-gate, a cross-gate was broken offto the right which is termed 1 off 1 to left of 2. Now head ofNo. 3 gate was parallel with this gate and its cross-gates, so Xo. 1to left of 3 was started out and coal was drawn from stalls of Xo. 2gate by this new road. Similarly 1 to right of 3 cut off Xo. 4 the workings, this process was continued and accom-panying table shows the gates, their lengths antl cost of mainten-ance. It can
Transactions . cor- rse, gto the the aJU o225 S 71 •J iiI. Profile, General Workings. LoNGWALL Mining and Emery Pit—Burland of seam. 50 feet up this cross-gate, a cross-gate was broken offto the right which is termed 1 off 1 to left of 2. Now head ofNo. 3 gate was parallel with this gate and its cross-gates, so Xo. 1to left of 3 was started out and coal was drawn from stalls of Xo. 2gate by this new road. Similarly 1 to right of 3 cut off Xo. 4 the workings, this process was continued and accom-panying table shows the gates, their lengths antl cost of mainten-ance. It can be seen that it would be unnecessary expense tokeep Xo. 2 gate in repair when the coal could l)e drawn by Xo. 3gate. The gates are designed to meet the face at from 75 to 100feet apart. The average grade will be assumed to be , which cor-responds to pitch noted in several gates. It is difficult, of course,to extenuate the actual pitch without a complete survey, owing tothe creeps formed by pack walls squeezing pavement up into theroadways. The cost
Size: 3163px × 790px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, booksubjectmineralindustries, bookyear1895
