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Investigations Aimed At The Development Of An Efficient Rock Excavation For Driving Machinery In Hard Rock Untersuchungen Gesteinsangriff Von Vortriebsmaschinen Fuer Hartes Gestein
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Book Synopsis Investigations Aimed at the Development of an Efficient Rock Excavation for Driving-Machinery in Hard Rock (Untersuchungen Gesteinsangriff Von Vortriebsmaschinen Fuer Hartes Gestein). by : Heinz Hendriks
Download or read book Investigations Aimed at the Development of an Efficient Rock Excavation for Driving-Machinery in Hard Rock (Untersuchungen Gesteinsangriff Von Vortriebsmaschinen Fuer Hartes Gestein). written by Heinz Hendriks and published by . This book was released on 1972 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: With simple rotary cutters it is possible to achieve an advantageous method of rock excavation at a free surface if the rotary cutters are mounted either in step-wise configuration on a conical drill-head with concentric cutting paths or mounted on a drill-head having planetary-type circulating drill-tool carriers and cycloidal cutting paths. For these methods of rock excavation, in drilling experiments which closely approximated actual practice, measurements were made on a test stand of the cutting forces affecting the rotary cutters for various penetration depths. The observations show that the advantage of rock excavation at a free surface consists above all in the fact that one can attain very high drilling velocities with comparatively low penetration forces. Moreover, this method of excavation also reduces the specific energy cost. (Author).
Book Synopsis USA CRREL Technical Publications by : Cold Regions Research and Engineering Laboratory (U.S.)
Download or read book USA CRREL Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1972 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Special Report - Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory by : Cold Regions Research and Engineering Laboratory (U.S.)
Download or read book Special Report - Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1972 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bibliography on Cold Regions Science and Technology by :
Download or read book Bibliography on Cold Regions Science and Technology written by and published by . This book was released on 1972 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book UMTA-MA written by and published by . This book was released on 1980 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
