Reviews in Engineering Geology
The first in this series, this volume contains several engineering geology articles that are still applicable and useful today: Petrography Applied to Portland-Cement Concrete, by Mielenz; Engineering Aspects of Sediment Transport, by Bruun (includes section on Biological Aspects, by Lackey); Photo Analysis and Interpretation in Engineering Geology Investigations, by Mollard; Engineering Geology of Radioactive Waste Disposal, by de Laguna; Engineering Seismology, by Neumann; Sand and Gravel, by Lenhart; Review of USSR Publications in Selected Fields of Engineering Soil Science, by Drashevska; and Stabilization of Rock by Bolting, by Thomas.
During the past 10 years rock bolting has evolved into a systematic method of underground roof, wall, and floor support, which is generally accepted wherever ground can be consolidated economically and efficiently. Although the method was known and used occasionally over a long period of time, apparently acceptance was contingent upon the improvements in drilling and mechanized loading that have taken place just before and concurrent with the development. Rock bolting effects a general improvement in safety by reducing roof-fall accidents, increases efficiency, and makes for conservation in mining.
This paper attempts a logical classification of rock bolts from the standpoint of utilization and provides current criteria for designing and testing installations.