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Keywords: Martin
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-023
.... At higher confinement the stress envelope makes a transition to the CD defined envelope (Diederichs & Martin 2010). Few test data in this range are available. Another objective is to detect the effect of low confinement on CI. 2 ROCKS INVESTIGATED Five different sedimentary rocks were selected...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-105
...-mechanical response of a backfilled and sealed microtunnel (Marschall et al. 2006). fluid modeling equation of state Disposal waste management hydraulic fracturing Martin Reservoir Characterization Upstream Oil & Gas reservoir geomechanics fracture aperture indurated claystone...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-101
... of approximately 100±30 m across the Molasse Basin and the Jura Fold and Thrust Belt in Northern Switzerland. Reservoir Characterization Mont Terri URL reservoir geomechanics Martin bedding laboratory Engineering fluid pressure opalinus clay anisotropy excavation EDZ Upstream Oil & Gas...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-079
... batholites in Manitoba, Canada (Martin, 1997). Reservoir Characterization distinct element method simulation Simulation MPa reservoir geomechanics strength confinement LdB granite heterogeneity rock strength Upstream Oil & Gas Martin international journal excavation tunnel...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-005
... Characterization Martin experiment uniaxial compressive strength structural geology Rock mechanics Lac du Bonnet granite excavation Upstream Oil & Gas cohesion failure envelope tunnel Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-055
... machine learning wellbore integrity Upstream Oil & Gas variation reservoir geomechanics structural geology Martin Reservoir Characterization Wellbore Design compressive strength test plagioclase boundary groundmass crack initiation initiation unconfined compressive strength...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-087
... are drilled perpendicular to the maximum principal stress orientation (Martin and Christiansson, 1991). drilling operation Reservoir Characterization LdB granite borehole orientation sample disturbance Upstream Oil & Gas borehole parallel approximate stress path reservoir geomechanics...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-083
... can also shift to a brittle phase due to the closure of pre-existing fractures in the rockmass as the result of the rise in confinement as the depth increases (Martin et al 2001). In rockmasses that are categorized as the mid-range of the rock classification systems where their failure is controlled...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-148
... appears to be critical for the propagation of the fractures. The low magnitude stress field (Ask et al. 2007) enhances the propagation of existing fractures in the network. On the other hand, the high magnitude stress field (Martin 2007) tends to close the existing fractures and mobilise the frictional...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-071
... and under an anisotropic in situ stress field, the process of spalling can form notch-like geometries. Extensive research over the last few decades, as summarized by Martin (1997), Kaiser et al. (2000) and by Diederichs (2003,2007), has demonstrated that brittle non-porous rocks exhibit an maximum long term...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-072
... that the in-situ spalling strength of a rock mass is significantly lower than the uniaxial compressive strength (UCS), even when the rock mass is massive and homogeneous (Diederichs et al. 2004, Martin & Christiansson 2009). Martin and Christiansson (2009) suggested that the spalling strength is fundamentally...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-073
... be damaged, resulting in significantly reduced core strengths (e.g. Martin and Stimpson, 1994). Such core damaging processes are highly probable in stress environments relevant for breakout formation. Thus, an underestimation of UCS due to core damage could lead to an underestimation of in-situ stress...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-005
... reinforcement rock mass property Upstream Oil & Gas criterion discontinuity Reservoir Characterization excavation vertical stress rock mass Hoek numerical model deformation classification Martin characteristic situ stress tunnel 49 Rock Engineering in Difficult Ground Conditions Soft...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-168
... method. Reservoir Characterization Martin intersection cube thin section Upstream Oil & Gas microcrack Lac du Bonnet granite granite p-wave velocity orientation variation MPa grey granite s-wave velocity polarisation borehole extension tunnel face 2 Eurock '96, Barla (ed...

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