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Author: Lewis Emanuel Young
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 124
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Book Description
Author: Lewis Emanuel Young
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 124
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Book Description
Author: Lewis Emanuel Young
Publisher:
ISBN:
Category : Subsidences (Earth movements).
Languages : en
Pages : 212
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Book Description
Author: Lewis Emmanuel Young
Publisher: Forgotten Books
ISBN: 9781333344672
Category : Technology & Engineering
Languages : en
Pages : 216
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Book Description
Excerpt from Subsidence Resulting From Mining The subject of the subsidence of the earth's crust as a result of underground excavation due to mining has attracted Widespread attention for some years past, but particularly during recent years. With the extension of mining and the increased value of the surface above the mines in many localities, the growth of towns in mining regions, and the extension of railroads over mining properties, the subject is one that will be of increasing interest as time goes on, not alone to those engaged in mining coal and ores, but to the railroads, municipalities, and other owners and users of the surface that may be affected by mining opera tions. That the subject is not one of mere local interest is shown by the widespread distribution of surface subsidence as described in the follow ing pages. This bulletin has been prepared not with a View of bringing forward any new theories in regard to the subject, but it is in the nature of a reconnoissance and a statement of present knowledge of the subject, based upon the literature available up to the present time. It and a com panion preliminary Cooperation bulletin on subsidence in Illinois by Dr. Young, which will be issued by the Illinois Geological Survey, are intended as studies upon which to base a detailed cooperative investiga tion of. Subsidence conditions in Illinois. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Lewis Emanuel Young
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Author:
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ISBN:
Category :
Languages : en
Pages : 0
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Author: Keros Cartwright
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 24
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Author: Jack R. Nawrot
Publisher: Forgotten Books
ISBN: 9780483536081
Category : Technology & Engineering
Languages : en
Pages : 570
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Excerpt from Problem Sites: Lands Affected by Underground Mining for Coal in Illinois Early coal mining in Illinois consisted of digging in outcrops along river bluffs or stripping shallow overburden from seams near the surface. Such techniques resulted in very little refuse (waste coal and other debris) at the surface, as most coal was selected by hand without further processing. Modern mining practices incorporating continuous mining machines, as well as the demand for clean, processed coal, has resulted in current refuse rates of 20 to 50 percent of the deep mined coal. In 1974, the nation's coal industry generated about 130 million tons of coal mine refuse (schlick and Wahler Refuse produced by underground mines in Illinois totaled an estimated 8 to 15 million tons in 1975, or approximately million cubic yards. Coal preparation plants produce two types of refuse material gob and slurry. Coarse refuse (plus 28 sieve or referred to as gob, contains waste coal, rock, pyrites, or other materials of relatively large size. The washing process produces effluent (minus 28 sieve), referred to as slurry, containing small coal particles, clay, and other debris (martin In the past, gob was deposited in refuse piles; slurry was pumped and deposited into streams, onto adjacent terrestrial areas, or into impoundments. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Charles Arthur Herbert
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 874
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Author:
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 40
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Author: Thomas O. Glover
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 8
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