The Ventilation of Mines Designed for Use in Schools And Colleges And for Prac
The Ventilation of Mines Designed for Use in Schools And Colleges And for Prac
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In our eReader you can find the full English version of the book. Read The Ventilation of Mines Designed for Use in Schools And Colleges And for Prac 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 The Ventilation of Mines Designed for Use in Schools And Colleges And for Prac
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To quickly assess the difficulty of the text, read a short excerpt:
Of air per minute, and each mule 500 cu. Ft. Per minute, we shall require 27, 000 cu. Ft. Per min. Travelling; but, as we must provide against 46 MINE-VENTILATION.
every exigency, gob-fires, poor stopings, obstructed air-courses, etc. , etc. , it will not be safe to estimate upon less than 30, 000 cu. Ft. Of air per minute in circula- tion. In this problem the values assumed are taken as existing, adopted, or possible limiting values of the various factors of ventilation. We will suppose that t...he inlet and discharge openings are shafts of the same depth, and the seam of coal maintains a practical level throughout the pit. Assume the following : h = 900 ft motive height.
a = 50 sq. Ft sec. Area of airway.
s = 120, 000 sq. Ft rubbing surf, of airway.
Q = 30, 000 cu. Ft at temp. T v , = 32 F avg. Temp, of downcast.
/ 3 = 60 F. Temp. Of air where quant, is taken. T^ = 70 F. Temp. Of air before reaching furn. / B = (?)... . Temp, of air at bottom of upcast.
tfj = (?) avg. Temp, of upcast.
B = 30" height of barom.
What to read after The Ventilation of Mines Designed for Use in Schools And Colleges And for Prac?
You can find similar books in the "Read Also" column, or choose other free books by James Thom Beard to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of air per minute, and each mule 500 cu. Ft. Per minute, we shall require 27, 000 cu. Ft. Per min. Travelling; but, as we must provide against 46 MINE-VENTILATION.
every exigency, gob-fires, poor stopings, obstructed air-courses, etc. , etc. , it will not be safe to estimate upon less than 30, 000 cu. Ft. Of air per minute in circula- tion. In this problem the values assumed are taken as existing, adopted, or possible limiting values of the various factors of ventilation. We will suppose that t...he inlet and discharge openings are shafts of the same depth, and the seam of coal maintains a practical level throughout the pit. Assume the following : h = 900 ft motive height.
a = 50 sq. Ft sec. Area of airway.
s = 120, 000 sq. Ft rubbing surf, of airway.
Q = 30, 000 cu. Ft at temp. T v , = 32 F avg. Temp, of downcast.
/ 3 = 60 F. Temp. Of air where quant, is taken. T^ = 70 F. Temp. Of air before reaching furn. / B = (?)... . Temp, of air at bottom of upcast.
tfj = (?) avg. Temp, of upcast.
B = 30" height of barom.
What to read after The Ventilation of Mines Designed for Use in Schools And Colleges And for Prac?
You can find similar books in the "Read Also" column, or choose other free books by James Thom Beard to read onlineMoreLess
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