... metals & mining esterhuizen proceedings element size boundary element modeling samuel escobar stone pillar width-to-height ratio cell element reservoir characterization pillar strength pillar concentric ring zone capacity pillar upstream oil & gas strength strength equation...

... reservoir geomechanics strength upstream oil & gas rock pillar metals & mining squat pillar esterhuizen pillar model international journal reservoir characterization pakalnis rock mechanics mpa brittle rock pillar wall long-term strength short-term strength time...

... at three different stages of longwall retreat mining. This work provides a basis for continued research aimed at an engineering-based design of coal pillar rib support design. metals & mining Reservoir Characterization reservoir geomechanics coal bed methane coalbed methane esterhuizen...

... planes in the roof provides good correlation with areas of observed and measured roof displacement that occurred in the mine. metals & mining esterhuizen concentration reservoir geomechanics Reservoir Characterization roof displacement vertical stress concentration mining progress...

... and Reed, 2005). Furthermore, the GRC concept has been implemented in the analysis of pillar stability analysis (Esterhuizen et al., 2010b and Damjanac et al., 2014). This method also found application, though to a lesser extent, in designing natural support systems (Gill et al., 1994). The GRC concept...

... pillar strength equation. metals & mining esterhuizen rock strength pillar collapse Upstream Oil & Gas Iannacchione mountain structural geology strength discontinuity through-going discontinuity southwestern pennsylvania limestone pillar rock mass classification Reservoir...

... eastern and western U.S. mines. Reservoir Characterization US government Artificial Intelligence reservoir geomechanics esterhuizen Ground Control subsidence pillar overburden coal material proceedings gob parameter mining strength sandstone MPa metals & mining field...

..., and discontinuity dip and properties) can be used to create site specific empirical design charts. metals & mining esterhuizen numerical analysis Reservoir Characterization pillar strength strength formula discontinuity height ratio structural geology strength confinement design chart rock...

... in numerical model analysis in rock slope stability engineering (Lorig and Varona, 2000). This modeling technique was adapted to underground coal mine entry analysis by Esterhuizen (2015) to address the need for a method to compare the effectiveness of different support systems when designing ground support...