Download or read book Mine ventilation Stoppings with Especial Reference to Coal Mines in Illinois written by Robert Young Williams and published by . This book was released on 1915 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine ventilation Stoppings with Especial Reference to Coal Mines in Illinois written by United States. Bureau of Mines and published by . This book was released on 1916 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine ventilation Stoppings with Especial Reference to Coal Mines in Illinois written by Robert Young Williams and published by . This book was released on 1915 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine Ventilation Stoppings written by R. Y. Williams and published by Forgotten Books. This book was released on 2018-02-28 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Mine-Ventilation Stoppings: With Especial Reference to Coal Mines in Illinois The foregoing discussion of renewals deals with the depreciation of stoppings through normal mining conditions. There are, however, extraordinary agencies that destroy stoppings, some of these agencies partly or wholly wrecking certain types of stoppings and yet in no Way injuring other types. Such agencies are: Fires, windy shots, blown-out shots, explosions, local roof falls, general mine squeezes, and water. In order to obtain the annual expense for emergency repairs on the different kinds of mine stoppings, information was obtained from coal operators regarding the number of stoppings and the cost of repairs each year because of these extraordinary agencies. The quotient obtained by dividing the total cost by the number of stop pings ih use at the particular mine was charged to each stopping as the a1mual cost of emergency repairs. For example, at one mine the records showed that 18 stoppings were destroyed by windy or blown out shots; the cost of each repair averaged the total cost was and, as stoppings were in use, the expense to be dis tributed over each stopping was 12 cents per annum. A compilation of the information obtained on the annual expense required for emergency repairs is given in Table 7 following. 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.
Download or read book Mine ventilation Stoppings with Especial Reference to Coal Mines in Illinois written by Robert Young Williams and published by . This book was released on 1913 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine ventilation Stoppings with Especial Reference to Coal Mines in Illinois by R Y Williams written by Robert Young Williams and published by . This book was released on 1915 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Factors Affecting and Suggested Ways for Improving Coal mine Ventilation with Particular Reference to Mines in Illinois Indiana and Western Kentucky written by C. A. Herbert and published by . This book was released on 1953 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stoppings for Ventilating Coal Mines written by Edward M. Kawenski and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methane Accumulations From Interrupted Ventilation written by Howard I. Smith and published by Forgotten Books. This book was released on 2018-02-26 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Methane Accumulations From Interrupted Ventilation: With Special Reference to Coal Mines in Illinois and Indiana The mining laws Of many States provide that when ventilation is interrupted in mines in which methane is generated the men. In the workings affected, especially if open lights are used there, shall be gotten out as quickly as possible. There are many mines or sections Of a mine in which only a small quantity Of methane is generated and where, under regular conditions of ventilation, it is so diffused with the air as not to be detectable with a safety lamp. These places are considered nongaseous and Often no concern is felt if the ventilation is interrupted even for several hours at a time. That locally in such mines there may be dangerous accumulations of methane within a short time if the air current is stopped is indi cated by the tests described in this paper. In three mines, two in southern Illinois and one in Indiana, samples Of mine air were collected and analyzed from working places where no methane had been reported by the mine examiner. By stopping the air current during the tests any accumulation Of methane through this interrupted ventilation was detected. The results show a8 methane accumulations from interrupted ventilation. 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.
Download or read book The Humidity of Mine Air with Special Reference to Coal Mines in Illinois written by United States. Bureau of Mines and published by . This book was released on 1915 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Humidity of Mine Air written by Robert Young Williams and published by . This book was released on 1914 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by and published by . This book was released on 1922 with total page 914 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the Institution of Mining Engineers written by Institution of Mining Engineers (Great Britain) and published by . This book was released on 1908 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Paper written by United States. Bureau of Mines and published by . This book was released on 1936 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Host Bibliographic Record for Boundwith Item Barcode 30112118408787 written by and published by . This book was released on 1917 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by United States. Bureau of Mines and published by . This book was released on 1914 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Carbonizing Properties and Petrographic Composition of Millers Creek Bed Coal from Consolidation No 155 Mine Johnson County Ky written by Arno Carl Fieldner and published by . This book was released on 1937 with total page 1252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
