Author: Robert Young WilliamsPublisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 46
Book Description
Mine-ventilation Stoppings with Especial Reference to Coal Mines in Illinois
Author: Robert Young WilliamsPublisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 46
Book Description
Mine-ventilation Stoppings with Especial Reference to Coal Mines in Illinois
Author: United States. Bureau of MinesPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Mine-ventilation Stoppings with Especial Reference to Coal Mines in Illinois
Author: Robert Young WilliamsPublisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 0
Book Description
Mine-ventilation Stoppings with Especial Reference to Coal Mines in Illinois
Author: Robert Young WilliamsPublisher:
ISBN:
Category : Mine ventilation
Languages : en
Pages : 30
Book Description
Mine-Ventilation Stoppings
Author: R. Y. WilliamsPublisher: Forgotten Books
ISBN: 9780484629485
Category : Technology & Engineering
Languages : en
Pages : 42
Book Description
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.
Mine-ventilation Stoppings, with Especial Reference to Coal Mines in Illinois, by R. Y. Williams...
Author: Robert Young WilliamsPublisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
Some Factors Affecting and Suggested Ways for Improving Coal-mine Ventilation, with Particular Reference to Mines in Illinois, Indiana, and Western Kentucky
Author: C. A. HerbertPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 32
Book Description
Stoppings for Ventilating Coal Mines
Author: Edward M. KawenskiPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 28
Book Description
Methane Accumulations From Interrupted Ventilation
Author: Howard I. SmithPublisher: Forgotten Books
ISBN: 9780666457110
Category : Technology & Engineering
Languages : en
Pages : 54
Book Description
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.
The Humidity of Mine Air with Special Reference to Coal Mines in Illinois
Author: United States. Bureau of MinesPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description