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 84
Página 18
... driven off and the coal fully ignited , the fire is similar in every way to that pro- duced by a hard - dry anthracite . Coals of this class predominate in the western parts of the Southern and Western Middle coal - fields and in the ...
... driven off and the coal fully ignited , the fire is similar in every way to that pro- duced by a hard - dry anthracite . Coals of this class predominate in the western parts of the Southern and Western Middle coal - fields and in the ...
Página 20
... expose the coal to view . The smut of a bed having been thus discovered , a small drift is driven in a sufficient distance to fully expose its thickness and to determine its quality , and the 20 AC . REPORT OF PROGRESS . H. M. CHANCE .
... expose the coal to view . The smut of a bed having been thus discovered , a small drift is driven in a sufficient distance to fully expose its thickness and to determine its quality , and the 20 AC . REPORT OF PROGRESS . H. M. CHANCE .
Página 24
... driven at right angles to it until the top slate is encountered . The accompanying illustration ( Page plate 4 ) is taken from Vol . II of the final report of the First Survey . It shows the long " tailing out " of an outcrop down hill ...
... driven at right angles to it until the top slate is encountered . The accompanying illustration ( Page plate 4 ) is taken from Vol . II of the final report of the First Survey . It shows the long " tailing out " of an outcrop down hill ...
Página 26
... driven remains free from water , and the vein can be exam- ined at any time in the future . But a tunnel often requires much heavier timbering than a shaft , ( and a greater dis- tance must be driven to reach hard coal , ) and this is a ...
... driven remains free from water , and the vein can be exam- ined at any time in the future . But a tunnel often requires much heavier timbering than a shaft , ( and a greater dis- tance must be driven to reach hard coal , ) and this is a ...
Página 27
... driven upon an outcrop laid bare in a ravine or cross- cut valley , there is no necessity for digging the preliminary trench or for commencing the entry below the seam . The drift is located immediately upon the bed , and driven in on a ...
... driven upon an outcrop laid bare in a ravine or cross- cut valley , there is no necessity for digging the preliminary trench or for commencing the entry below the seam . The drift is located immediately upon the bed , and driven in on a ...
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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...