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Tunnel contract strategy and implementation
Published in Dean Brox, Practical Guide to Rock Tunneling, 2017
Engineering geologists should perform geological and geotechnical mapping of all exposed rock conditions, collect samples for testing, and compile observations on tunnel stability and or deterioration. The Assistant Resident Engineer should perform detailed visits and inspections of all of the underground works on a routine basis, typically 3–4 times per work week, to evaluate the overall stability of the tunnel, and confirm the installed tunnel support is of acceptable quality, or provide instructions for additional support.
Geohazards
Published in White David, Cassidy Mark, Offshore Geotechnical Engineering, 2017
It is the job of geotechnical engineers and engineering geologists to identify geohazards, potential triggers, failure modes, event severity, event frequency, the consequences of failure and the probability of failure. Geohazard assessment and analysis must be based on adequate technologies and techniques. Kvalstad et al. (2001) identified the following areas for development to improve geotechnical engineering in geohazard areas:
Conclusions
Published in Peter N.W. Verhoef, Wear of Rock Cutting Tools, 2017
The following conclusions can be drawn from the survey of problems of wear in rock dredging in the preceding chapters: Wear problems in rock dredging have commonly been approached from a mechanical engineering point of view, through the design of better performing excavation tools and the use of improved wear resistant materials. The science of tribology has made clear that wear processes in general are a result of the particular conditions that are operating. Intensive study of the tribological system, involving microscopic examination of the worn parts, may reveal the wear mechanisms that have operated on the tool. The tribological approach can be of help in the case of dredging, but is hampered by the varying nature of the rock masses being dredged. Even when the rock properties identified as having influence on wear (such as strength, mineral composition (hardness of the abrasive minerals), grain size and shape, rock mass structure) are properly described and measured in a site investigation, it remains problematic to predict the amount of wear on the dredging equipment. A trial excavation would always be needed.Looking at the practice of rock dredging, it becomes clear that even basic information is sometimes lacking in site investigation reports. Often the most common abrasive mineral, quartz, has been ignored. This is probably the most important cause of unexpected wear problems. The resolution of these problems, of course, must be found in improved site investigation practice. For example, just complying with the classification of soils and rocks to be dredged of the PIANC (1984; see Appendix A), is not enough.Site investigations should preferably be carried out with the involvement of engineering geologists, which are especially trained to translate geological information to the engineering project at hand. The engineering geologist studying dredging projects should consult geologists familiar with the geology of the site surroundings. The engineering geologist should be aware of the requirements of a dredging operation.
A comprehensive skills catalogue for the raw materials sector and the structure of raw materials education worldwide
Published in Mining Technology, 2020
Philipp Hartlieb, Luis Jorda Bordehore, Manuel Regueiro y González-Barros, Vitor Correia, Jelena Vidovic
The starting point, presented in this paper, focusses on the two professions most linked to the world of mining, that is the ‘classical’ geologist and mining engineer (in some countries considered civil engineer of mines), as well as engineering geologist and geological engineer. The skills may be later completed at a later stage with other related professions.