A Text-book of Ore and Stone MiningGriffin, 1897 - 744 Seiten |
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Seite xx
... horizontal slices , with filling up , Foxdale Mine 335 336 Working a wide lode having a hard and a soft part • 337 385. Rio Tinto , pillar and chamber workings , vertical section 386 . 339 29 11 19 387 . 19 19 99 99 393 . 394 . 395 ...
... horizontal slices , with filling up , Foxdale Mine 335 336 Working a wide lode having a hard and a soft part • 337 385. Rio Tinto , pillar and chamber workings , vertical section 386 . 339 29 11 19 387 . 19 19 99 99 393 . 394 . 395 ...
Seite 5
... horizontal ; its strike is the direction of a horizontal line drawn in the plane of stratification . The thickness of workable beds varies within very wide limits . The productive part of the copper - shale at Mansfeld is only 3 inches ...
... horizontal ; its strike is the direction of a horizontal line drawn in the plane of stratification . The thickness of workable beds varies within very wide limits . The productive part of the copper - shale at Mansfeld is only 3 inches ...
Seite 10
... horizontal ; more frequently they are inclined . The wall above a lode is called the hanging FIG . 6 . FIG . 7 . E FA wall , AB , the one underneath , the foot wall , CD . The rock surrounding or enclosing the lode is called the country ...
... horizontal ; more frequently they are inclined . The wall above a lode is called the hanging FIG . 6 . FIG . 7 . E FA wall , AB , the one underneath , the foot wall , CD . The rock surrounding or enclosing the lode is called the country ...
Seite 28
... HORIZONTAL SCALE 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 VERTICAL SCALE THREE TIMES THAT OF THE HORIZONTAL SCALE the Mountain Limestone filled up with red clay which encloses small lumps of asbolane . This deposit was worked ...
... HORIZONTAL SCALE 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 VERTICAL SCALE THREE TIMES THAT OF THE HORIZONTAL SCALE the Mountain Limestone filled up with red clay which encloses small lumps of asbolane . This deposit was worked ...
Seite 89
... horizontal displacement , and BC the shift along the line of dip . The study of faults is important he- FIG . 79 . cause the miner working the bed AB ( Fig . 78 ) , wants to know after reaching the fault XY where to find the ...
... horizontal displacement , and BC the shift along the line of dip . The study of faults is important he- FIG . 79 . cause the miner working the bed AB ( Fig . 78 ) , wants to know after reaching the fault XY where to find the ...
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Häufige Begriffe und Wortgruppen
adit attached belt boring Boryslaw bottom bucket cage carbonic acid carried cast-iron cent clay coal compressed air Comstock lode consists containing copper Cornwall crushed cylinder Davy lamp deposit depth district drawn drill driven drum employed engine excavation explosives feet fire-damp galena gold ground gypsum holes horizontal inches in diameter inclined Inst iron pyrites ironstone ladders lamp limestone lode lower machine machinery magnetic main rod Mansfeld Mechernich metal method metres mineral mines ordinary ozokerite particles passes phosphate piece pipe piston plate plunger pressure pulley pumping quantity quarries quartz revolving rock roof rope sandstone SCALE screw separate shaft shale side sieve sinking slate sometimes specific gravity steam steel stone stroke sulphur surface thick timber tube tunnel underground valve veins ventilation vertical waggon washing wheels whilst winding wire wire rope wooden yards
Beliebte Passagen
Seite 53 - KNOW YOUR OWN SHIP. BY THOMAS WALTON, NAVAL ARCHITECT. Specially arranged to suit the requirements of Ships' Officers, Shipowners, Superintendents, Draughtsmen, Engineers, and Others. This work explains, in a simple manner, such important subjects as: — Displacement. — Deadweight.— Tonnage.— Freeboard. —Moments. — Buoyancy.— Strain Structure.— Stability.— Rolling.— Ballasting. — Loading. — Shifting Cargoes. — Admission of Water.— Sail Area.
Seite 43 - The Micro-Structure of Metals and Alloys. — Economic Considerations. " No English text-book at all approaches this in the COMPLETENESS with which the most modern views on the subject are dealt with. Professor Austen's volume will be INVALUABLE, not only to the student, but also to those whose knowledge of the art is far advanced.
Seite 31 - I. — ALKALIES AND ALKALINE EARTH METALS : Magnesium, Lithium, Beryllium, Sodium, Potassium, Calcium, Strontium, Barium, the Carbides of the Alkaline Earth Metals. PART II. — THE EARTH METALS: Aluminium, Cerium, Lanthanum, Didymium. PART III. — THE HEAVY METALS: Copper, Silver, Gold, Zinc and Cadmium, Mercury, Tin, Lead, Bismuth, Antimony, Chromium, Molybdenum, Tungsten, Uranium, Manganese, Iron, Nickel, and Cobalt, the Platinum Group. " COMPREHENSIVE and AUTHORITATIVE ... not only FULL of VALUABLE...
Seite 9 - We are of opinion, therefore, that the term as used in the acts of Congress is applicable to any zone or belt of mineralized rock lying within boundaries clearly separating it from the neighboring rock.
Seite 33 - NYSTROM'S POCKET-BOOK OF MECHANICS AND ENGINEERING. Revised and Corrected by W. DENNIS MARKS, Ph.B., CE (YALE SSS), Whitney Professor of Dynamical Engineering, University of Pennsylvania. Pocket Size. Leather, 155.
Seite 38 - was designed by Professor KANJUNE at an OOCTION to the above Series of Manuals. PROF. RANKINB'S WORKS— (Continued). VII. MISCELLANEOUS SCIENTIFIC PAPERS. Royal 8vo. Cloth, 31s. 6d. Part I. Papers relating to Temperature, Elasticity, and Expansion of Vapours, Liquids, and Solids. Part II. Papers on Energy and its Transformations. Part III. Papers on Wave-Forms, Propulsion of Vessels, &c.
Seite 16 - GENERAL CONTENTS. — The Materials of the Earth — A Mountain Hollow —Down the Valley — Along the Shore — Across the Plains — Dead Volcanoes —A Granite Highland— The Annals of the Earth— The Surrey Hills— The Folds of the Mountains. "The FASCINATING ' OpEN-AlK STUDIES' Of PnOF. OOLE give the subject a GLOW OF ANIMATION . . . cannot fail to arouse keen interest in geology."— Geological Magazine.
Seite 8 - All but the simplest explanations have, therefore, been avoided, and ANSWERS to the Exercises are given. Any person may readily, by careful study, become master of their contents, and thus lay the foundation for a further mathematical course, if desired. It...
Seite 17 - Management. PART II. — SEWAGE DISPOSAL WORKS IN OPERATION— THEIR CONSTRUCTION, MAINTENANCE, AND COST. Illustrated by Plates showing the General Plan and Arrangement adopted in each District.