Mining: An Elementary Treatise on the Getting of MineralsLongmans, Green, 1904 - 547 страници |
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Страница xii
... holes , etc. ( case 4 ) . 51. Section of above estate , showing faults 52. Section of bore - hole • 53. Section of above estate , showing faults and dips drawn to a " natural " scale 54. Plan of estate , showing outcrops , etc. , etc ...
... holes , etc. ( case 4 ) . 51. Section of above estate , showing faults 52. Section of bore - hole • 53. Section of above estate , showing faults and dips drawn to a " natural " scale 54. Plan of estate , showing outcrops , etc. , etc ...
Страница xiii
... holes 58588 65 65 66 67 68 99. Mather and Platt : engines and frame 69 100 . Mather and Platt : drilling - tool 70 ΙΟΙ ... hole , fuse , and candle 129. Electric blasting : circuit series 130. Electric blasting in parallel 131. Electric ...
... holes 58588 65 65 66 67 68 99. Mather and Platt : engines and frame 69 100 . Mather and Platt : drilling - tool 70 ΙΟΙ ... hole , fuse , and candle 129. Electric blasting : circuit series 130. Electric blasting in parallel 131. Electric ...
Страница xiv
... hole draining pit IIO 164 . Rectangular shafts : section III 165 . 166 . Shaft nearly round 167 . Temporary shaft lining Rectangular shafts : plan 168. Temporary shaft lining ( Walker's ) : plan 169. Temporary shaft lining ( Walker's ) ...
... hole draining pit IIO 164 . Rectangular shafts : section III 165 . 166 . Shaft nearly round 167 . Temporary shaft lining Rectangular shafts : plan 168. Temporary shaft lining ( Walker's ) : plan 169. Temporary shaft lining ( Walker's ) ...
Страница xv
... hole 153 212. Open hole at Mechernich 154 213. Bell pits 154 214 . Pillar - and - stall 155 215. Stoops and rooms 216. View of stall . 217. Props and packs 218. Section of pillars and stalls , showing creep 219 , 220. Diagrams of ...
... hole 153 212. Open hole at Mechernich 154 213. Bell pits 154 214 . Pillar - and - stall 155 215. Stoops and rooms 216. View of stall . 217. Props and packs 218. Section of pillars and stalls , showing creep 219 , 220. Diagrams of ...
Страница xvi
... hole 265. Hydraulic gold - mining 186 187 VENTILATION . 266. Brattice wooden boards 189 267. Brattice cloth . 189 268. Bratticed brick quadrant . 189 269. Bratticed brick wall 190 270. Bratticed brick wall , covered 190 271. Air - pipes ...
... hole 265. Hydraulic gold - mining 186 187 VENTILATION . 266. Brattice wooden boards 189 267. Brattice cloth . 189 268. Bratticed brick quadrant . 189 269. Bratticed brick wall 190 270. Bratticed brick wall , covered 190 271. Air - pipes ...
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air-current air-road anemometer bars bore-hole boring bottom brattice brick cage capstan cent centre coal measures coal-dust Coal-field colliery compressed conductors cubic foot cylinder Davy lamp depth detonator dirt distance drill driven drum electric engine fire-damp flame flange foot foot-pounds friction fulminate of mercury furnace gauze ground gunpowder haulage heat hole hoppet inches in diameter incline iron ironstone lamp length lifted load lower machine Millstone Grit mineral mines minute outcrop pass Permian pillars pipe piston pit-bottom plate props pulley pump road rocks rods roof rope rule safety-lamp sandstone screw seam of coal shaft shale shown in Fig shows side sinking sometimes speed spur-gearing square inch stalls steam steel stone strata stroke surface temperature thick timber tons tubbing tube upcast valves vein velocity vertical waggons Warwickshire water-gauge wedge weight wheel wire yards
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