Standardization of Mining Methods
Standardization of Mining Methods
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In our eReader you can find the full English version of the book. Read Standardization of Mining Methods 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 Standardization of Mining Methods
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This can be proved by the Paynter testing machine.
Sufficient rock drills should be kept in stock under- ground. Accidents will happen occasionally, and ma- chines get out of order, and there should be a number on hand to provide against such an emergency. In this event any man who starts a round, even if he has STANDARD EQUIPMENT 85 serious machine trouble, will be able to finish it in the shift.
SMALL MACHINES OFTEN SUITABLE Wherever possible, the small machines should be used, except in drif...ting in extremely hard ground, where the larger machine still holds it own. Recent competitive tests have been made with several drifting machines weighing about 150 lb. , and the results compared with those obtained from small machines, weighing about 45 lb. , and the drilling speed was found to be the same in both cases. This is possible because the smaller ma- chine puts in a smaller hole, and consequently less ground is taken out. The tests were made in fairly hard ground. In medium ground, however, more satis- factory results were obtained with the small machine than with the larger one ; and this indicates a wider field for it than has been thought possible.
What to read after Standardization of Mining Methods?
You can find similar books in the "Read Also" column, or choose other free books by Charles a Mitke to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This can be proved by the Paynter testing machine.
Sufficient rock drills should be kept in stock under- ground. Accidents will happen occasionally, and ma- chines get out of order, and there should be a number on hand to provide against such an emergency. In this event any man who starts a round, even if he has STANDARD EQUIPMENT 85 serious machine trouble, will be able to finish it in the shift.
SMALL MACHINES OFTEN SUITABLE Wherever possible, the small machines should be used, except in drif...ting in extremely hard ground, where the larger machine still holds it own. Recent competitive tests have been made with several drifting machines weighing about 150 lb. , and the results compared with those obtained from small machines, weighing about 45 lb. , and the drilling speed was found to be the same in both cases. This is possible because the smaller ma- chine puts in a smaller hole, and consequently less ground is taken out. The tests were made in fairly hard ground. In medium ground, however, more satis- factory results were obtained with the small machine than with the larger one ; and this indicates a wider field for it than has been thought possible.
What to read after Standardization of Mining Methods?
You can find similar books in the "Read Also" column, or choose other free books by Charles a Mitke to read onlineMoreLess
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