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Keywords: formula
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Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-019
... Abstract Theoretical calculation methods generally exaggerate the extent of the EDZ and used formulas do not apply to most rock types. This study comprises of correlating the theoretical to the realized extend of the EDZ on drill and blast (D&B) excavation surface. Generally when...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-105
... thoroughly. Based on the coupling relationship between the high prestress cable truss and the roof rock, the mechanical model of cable truss is built, and the calculation formulas of anchoring force and pre-tightening force are drawn out. The numerical simulation and field observation results of Xinsan mine...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-129
...- component volume borehole strainmeter. The volume or pressure change of three chambers can be given after little transformation to the analytical formula. 2 THE NEW STRUCTURAL DESIGN 2.1 Three-chamber structure When the stress and strain state of rock are delivered to the probe crust, it is converted...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-063
... at the bottom. formula MPa plane stress value Upstream Oil & Gas prefecture inclination azimuth rock burst Reservoir Characterization measuring point crustal stress measurement stress measurement Crustal stress hydropower traffic tunnel principle stress value reservoir geomechanics...
Proceedings Papers
Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-098
... ABSTRACT: This paper describes longwall numerical model of Tabas Coal Mine (Iran) by using commercial code FLAC3D. The coal seam was modeled as strain softening material and its parameters were established by calibrating separate test pillar models to common empirical pillar strength formulas...