Coal Miners Pocketbook Formerly the Coal And Metal Miners Pocketbook Princip
Coal Miners Pocketbook Formerly the Coal And Metal Miners Pocketbook Princip
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In our eReader you can find the full English version of the book. Read Coal Miners Pocketbook Formerly the Coal And Metal Miners Pocketbook Princip Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Coal Miners Pocketbook Formerly the Coal And Metal Miners Pocketbook Princip
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Box Regulator. This is simply an obstruction placed in those airways that would naturally take more air than the amount required. . It consists of a brattice or door placed in the entry, and having a small shutter that can be opened to a greater or less amount. The shutter is so arranged as to allow the passage of more or less air, according to the requirements. The box regulator is, as a rule, placed at the end or near the end of the return air- 920 VENTILATION OF MINES way of a split. It is u...sually placed at this point as a matter of convenience, because, in this positipn, it obstructs the roads to a less extent, the haulage from the back entry in this split being carried over to the main haulway, through a crosscut, before this point is reached. The difficulty, however, can be avoided, in most cases, by proper consideration in the planning of the mine with respect to haulage and ventilation. The objection to this form of regulator is that, in effect, it lengthens the airway, or increases its resist- ance, making the resistance of all the airways, per foot of area, the same.
What to read after Coal Miners Pocketbook Formerly the Coal And Metal Miners Pocketbook Princip?
You can find similar books in the "Read Also" column, or choose other free books by Thomas J Foster to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Box Regulator. This is simply an obstruction placed in those airways that would naturally take more air than the amount required. . It consists of a brattice or door placed in the entry, and having a small shutter that can be opened to a greater or less amount. The shutter is so arranged as to allow the passage of more or less air, according to the requirements. The box regulator is, as a rule, placed at the end or near the end of the return air- 920 VENTILATION OF MINES way of a split. It is u...sually placed at this point as a matter of convenience, because, in this positipn, it obstructs the roads to a less extent, the haulage from the back entry in this split being carried over to the main haulway, through a crosscut, before this point is reached. The difficulty, however, can be avoided, in most cases, by proper consideration in the planning of the mine with respect to haulage and ventilation. The objection to this form of regulator is that, in effect, it lengthens the airway, or increases its resist- ance, making the resistance of all the airways, per foot of area, the same.
What to read after Coal Miners Pocketbook Formerly the Coal And Metal Miners Pocketbook Princip?
You can find similar books in the "Read Also" column, or choose other free books by Thomas J Foster to read onlineMoreLess
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