... investigation plane discontinuity volcanology asia government phyllosilicate slickenside borehole groundwater breccia geothermal area sumatra The 5th International Workshop on Rock Mechanics and Engineering Geology in Volcanic Fields (RMEGV2021) ©2021 JSRM & JSEG, ISBN 978-4-907430-05-4 ISRM2021...

... site. The columns were regular but sinuous, 0.15 to 0.36 m in thickness, dipping 70 to 90°, with frequent low angle, discon- tinuous cross jointing. The measurements were made between four horizontal boreholes drilled 12 metres into the wall of a drill-and-blasted underground opening, at 46 m depth...

...: In this paper the geotechnical description of a halloysite clay, coming from boreholes performed in Barlovento Dam, is made. It is important to remark this material had a difficult behaviour during the performance of laboratory tests, clearly different of the materials Soil Mechanics usually treats...

... of approximately one meter thick. In order to achieve this arch, meter long and 22 mm diameter bore- holes were drilled. Fiberglass and polyester bolts, with high resistance to traction and inert to saline aggression, were introduced in the boreholes. The structural characteristics of the bolts are: deforma -tion...

... energy Deformational Behaviour instantaneous settlement construction trial embankment Reservoir Characterization embankment Island pyroclastic rock renewable energy borehole fill material upper reservoir Caldera settlement Upstream Oil & Gas El Hierro hydro-wind plant site...

... deformation potential Reservoir Characterization Marino geotechnical unit deep tunnel chert Frequency histogram geological unit deformation modulus rock mass structural geology peridotite borehole Hoek tunnel dolerite lava GSI Volcanic Rock Mechanics Olalla etal. (eds) © 2010 Taylor...