Report on the Mining Methods and Appliances Used in the Anthracite Coal FieldsBoard of Commissioners, 1883 - 579 páginas |
Dentro del libro
Resultados 1-5 de 71
Página 9
... increased dip - angle may perhaps give rise to a longitudinal fracture resulting in a more or less well - marked fault . The minor flexures usually run in a direction more nearly east and west than the average trend of the major axes ...
... increased dip - angle may perhaps give rise to a longitudinal fracture resulting in a more or less well - marked fault . The minor flexures usually run in a direction more nearly east and west than the average trend of the major axes ...
Página 30
... increases the man hoist- ing earth will raise it so slowly that the laborer below will remain idle much of the time . If it be impossible to place more than two men at work on the sinking , these two will be enabled to do tolerably well ...
... increases the man hoist- ing earth will raise it so slowly that the laborer below will remain idle much of the time . If it be impossible to place more than two men at work on the sinking , these two will be enabled to do tolerably well ...
Página 31
... increased by hedging off one corner of the shaft by a broad board , and within or immediately be- neath the triangular space thus formed ( which should run from within two or three feet of the bottom to the top ) placing a good strong ...
... increased by hedging off one corner of the shaft by a broad board , and within or immediately be- neath the triangular space thus formed ( which should run from within two or three feet of the bottom to the top ) placing a good strong ...
Página 39
... increased by about 20 % ; say to $ 2,500 , to make it available for comparison with other methods at the present time [ 1882. ] Cost of plant and drilling , Value of old rig , 66 66 fittings , $ 225 50 66 66 boiler and engine , 400 ...
... increased by about 20 % ; say to $ 2,500 , to make it available for comparison with other methods at the present time [ 1882. ] Cost of plant and drilling , Value of old rig , 66 66 fittings , $ 225 50 66 66 boiler and engine , 400 ...
Página 40
... increases the risk of flat and crooked holes , and necessitates careful watching and constant and uniform rotation of the drill . In some dis- tricts , as , for instance , the Wyoming basin , the hardness of the rocks is not a serious ...
... increases the risk of flat and crooked holes , and necessitates careful watching and constant and uniform rotation of the drill . In some dis- tricts , as , for instance , the Wyoming basin , the hardness of the rocks is not a serious ...
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Otras ediciones - Ver todas
Report on the Mining Methods and Appliances Used in the Anthracite Coal ... H. M. Chance Sin vista previa disponible - 2017 |
Report on the Mining Methods and Appliances Used in the Anthracite Coal ... H. M. Chance Sin vista previa disponible - 2015 |
Términos y frases comunes
accidents acid acid gas adopted airway amount angle anthracite coal anthracite regions anticlinal Atlas Sheet average bars basin bituminous bituminous coal boiler boss bottom brake brake band brattice breaker breasts built cage carbonic carbonic acid cent coal breaker cost depth diameter dirt distance drill driven drum dump eight empty Explosions fire fire boss fire-damp friction gangway gear gunboat haulage Hazleton head-frame holes inches inclined inside iron large number Lehigh less lever lift located manway method miner mining engineers mules necessary operated outcrop outlet pass pillars plane plate Pottsville District props pumps raised rock rods roof Roof-falls rope screen seam shaft or slope sheaves shown by Fig shute side sinking slate starting friction steam sufficient surface thick timber tion tons track tunnel underground usually ventilation wheels width Wilkes-Barre winding engine wire rope Wyoming basin yards
Pasajes populares
Página 504 - ... neglect or failure aforesaid, a right of action shall accrue to the widow and lineal heirs of the person whose life shall be lost for like recovery of damages for the injury they shall have sustained.
Página 513 - The owner or agent of every coal mine shall provide at least two shafts, or slopes, or outlets, separated by natural strata of not less than one hundred and fifty feet in breadth, by which shafts, slopes, or outlets distinct means of ingress and egress are always available to the persons employed in the coal mine...
Página 508 - ... employed therein, any but experienced, competent and sober engineers ; and no engineer in charge of such engine shall allow any person, except such as may be deputed for that purpose, by the owner or agent, to interfere with it or any part of the machinery, and no person shall interfere or in any way intimidate the engineer in the discharge of his duties ; and...
Página 497 - ... and shall ascertain that the mine is free from danger, and the workmen shall not enter the mine until such examination has been made and reported, and the cause of danger, if any, be removed.
Página 499 - It shall be the duty of the inspector upon being notified as herein provided to immediately repair to the scene of the accident, and make such suggestions as may appear necessary to secure the future safety of the men ; and if the results of the explosion...
Página 503 - ... or shall handle or disturb any part of the machinery of the hoisting engine, or open a door to a mine and not have the same closed again, whereby danger is produced, either...
Página 504 - For any injury to person or property, occasioned by any willful violation« of this Act, or willful failure to comply with any of its provisions, a right of action shall accrue to the party injured, for any direct damages sustained thereby...