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Showing: 1 to 10 of 325 matches for "a long hole open stopping"
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| TITLE |
Techniques for Pitch Mining in Anthracite |
| SUMMARY |
... turned into the coal chute by means of a stopping. ... or rushes of rock in the open cut can ... Experimental Blasthole Mining Interest in long hole methods has been ... |
| AUTHOR |
Schnee, Garfield, A. |
| PUBLISHED |
1950 |
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| TITLE |
New Developments in Mine Ventilation |
| SUMMARY |
... amount of time in carefully installing the test stopping so as ... mm (4-in.) duct, if the duct is not too long. ... it is desirable to leave as much open hole at the ... |
| AUTHOR |
Kissell, Fred N. |
| PUBLISHED |
1982 |
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| TITLE |
The New Horadiam Method Of Mining At Copper Mountain |
| SUMMARY |
... Open stopin ... in cross section, using the four-hole pyramid cut and employing one miner and helper with ... As long columns had to be employed there was much vibration ... |
| AUTHOR |
Douglas, R. S. ; Brehaut, C. H. ; Taylor, W. N. ; Shannon, H. A. |
| PUBLISHED |
1945 |
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Showing: 1 to 10 of 325 matches for "a long hole open stopping"
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