. Deep borehole surveys and problems. Boring. (c)-Suspension Glamp Fig. 22. 5. For hydraulic stowing. 6. For utilizing any hydraulic head which peculiar geo- logical conditions may provide in old workings (Fig. 23). rSurface rrr7TTfrr->i. + 850' El A 800' FiQ. 23.—Ideal cross section of a synclinal basin. 7. To aid ventilation by draining off gases. 8. For circulating tubes when sinking by the freezing process. 9. For cementation. 10. For checking any other Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
. Deep borehole surveys and problems. Boring. (c)-Suspension Glamp Fig. 22. 5. For hydraulic stowing. 6. For utilizing any hydraulic head which peculiar geo- logical conditions may provide in old workings (Fig. 23). rSurface rrr7TTfrr->i. + 850' El A 800' FiQ. 23.—Ideal cross section of a synclinal basin. 7. To aid ventilation by draining off gases. 8. For circulating tubes when sinking by the freezing process. 9. For cementation. 10. For checking any other Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Haddock, M. H. (Marshall Henry). New York, McGraw-Hill
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