... ABSTRACT: The subsurface pillar-supported mining openings in Mendig extend over an area of about 200,000 m 2 . They are remaining from former basalt mining activities. In certain parts of the disused mining openings stability problems like pillar failure and surface collapses occurred already...

... ABSTRACT: The paper presents the methodology applied for the compilation of a conceptual level geotechnical model for Kao Mine in Lesotho. The assumption was made whereby the geology, structure, rock mass and hydrogeological conditions of the Jurassic basalt country rock and the Cretaceous...

... ABSTRACT: This paper deals with the geomechanical characterization of the Lalibela (Ethiopia) rock-mass within which the famous UNESCO cultural heritage hewn churches were excavated. The churches were excavated into a layer of ignimbrite embedded between basalts flows. On the base...

... ABSTRACT: Basaltic rocks display a wide range of porosity depending on size of vesicles as a result of their complex genesis. Predicting of strength of rock material have crucial importance for design of engineering structures such as dams, foundations, tunnels, and other engineering projects...

.... Geological Conditions The area of the project is situated in a volcanic environment of tertiary and quaternary age. The topographical form of the valley is U-shaped. Rocks of basaltic and andesitic composition are the predominant rock types. In the geological terminology of the project, these rocks...

... monoaxial loading condition point load test Artificial Intelligence experimental relationship porosity machine learning Upstream Oil & Gas basalt mean value strength data Rock Mech specimen macropore lithotype effusive rock strength value volcanic rock tensile strength Rock...

... rock mass is common (Bye and Bell 2001). Engineering basalt stability metals & mining Rock mechanics discontinuity Reservoir Characterization kinematic analysis water content kimberlite Lesotho bench stack configuration procedure wedge failure friction angle western pitwall...

..., the comparative data and correction factors, necessary in identification of rock massive behaviour at a great depths, have been acquired. structural geology attenuation anhydrite reservoir geomechanics absolute dilatancy threshold basalt great depth threshold elastic wave velocity Upstream Oil...

... to define processes occurring during the interaction as well as the influence of the pulsing jet on newly created rock surface. In this paper, selected results obtained during laboratory tests of cutting of rocks by pulsing water jets are presented. Tests were performed on basalt, sandstone and granite...

... is excavated to its full width and the bottom of cavern has reached to 150.0m level. In the paper mainly the results of roof monitoring are presented. The underground cavity is excavated through the igneous basaltic rock mass. For better appreciation, a brief geology of the area with the rock mass quality Q...

... from the projects mentioned above and specifically focus on the parameters used in the application of quantitative rock mass classification systems in volcanic, basaltic rock types. Upstream Oil & Gas sprayed concrete Artificial Intelligence rock bolt natural language basalt bedrock...

... principal stress at strength failure as a function of confining pressure in the brittle, or at most, transitional field. Samples of these rocks were tested by different investigators at confining pressures that rarely exceeded 100 MPa; it was only Shimada (1986) who tested samples of Yakuno basalt under...

... Basalts are the most common rocks of the Volcanic Complex of Lisbon. The interest of knowing the mechanical properties of this type of rock lays both in its interference with engineering projects (as tunnels and foundations) and its industrial exploitation (crushed stone for road paving, high...