... of the measured borehole diametrical deformation. One of the key input parameters in this back-analysis method is the borehole convergence. To calculate the convergence, the initially-drilled borehole diameter before deformation is required. The rock mass in the ground is always under stress and a drilled hole...

... ABSTRACT: In tunnel construction, the total tunnel wall displacement increases due to face advancement and the time-dependent behavior of the surrounding rock mass. The convergence confinement method (CCM) is one of the approaches used to analyze the interactions between tunnel wall...

... geomechanics completion installation and operations geological subdiscipline reservoir characterization cylinder netherlands reduction deformation apparatus rocksalt mpa caprock aperture deformation geomechanics symposium upstream rocksalt creep convergence hydraulic aperture hydrocarbon...

... such as wedge-failures and plan-failures, squeezing phenomena, karst formations, water inrush in the tunnel, hard and abrasive rock, landslides, and convergence are considered as primary causes of geotechnical risks in hard rock tunnelling. The primary objective of this study is to identify potential...

... ABSTRACT: New Afton's B3 block cave footprint has been in steady state production since 2022. During mining, the production footprint is subject to changing stresses that have been observed to cause squeezing and convergence of the drift profile at drawpoints and extraction drives. This can...

... ABSTRACT: The iterative sequential fixed stress coupling scheme ( SC ) for coupled flow and geomechanics has proven to be unconditionally stable. However, SC suffers from poor outer loop convergence, particularly evident in tightly coupled poromechanics problems. This work addresses...

..., resulting in the transition toward the formation of shear fracturing. reservoir geomechanics excavation geology geological subdiscipline hydraulic fracturing displacement diederich footprint convergence criterion dmlz calibration excavation boundary geologist reservoir characterization...

... convergence data to identify significant variables and estimate future deformation and stability. The second case study focuses on ongoing analysis of coal burst mechanics and associated factors. Over the last three decades, a hybrid statistical-analytical methodology has been applied for identifying...

... and openings over three levels, including shaft access. The S.X. underground mine will be the launch site and be used as a testbed for trialing the Ground Support Asset Management program. Key aspects that degrade the useful life of elements are corrosion and deformation due to excessive convergence yielding...

.... The convergences related to these stress redistributions around the mine openings might change their structural integrity and, subsequently, the explosion resistivity. Studying the effect of increasing vertical load like abutment stress on such underground mine stopping for the explosion resistance is difficult...

.... tangent formulae gradient instruction tensor partition history convergence artificial intelligence calculation comprehensive constitutive model solver operator formulation matrix equation transformation software computation ARMA 22 865 A Comprehensive Constitutive Model Solver Chieslar...

... chain monte carlo convergence ARMA 22 0774 Stochastic Inversion of Wellbore Stability Models Calibrated With Hard and Soft Data Nicolaidou, E. University of Bristol, Bristol, United Kingdom Birchwood, R.A., and Prioul, R. Schlumberger-Doll Research, Cambridge, Massachusetts, USA Rodriguez-Herrera...

.... To represent the swelling phenomenon, a zone of ground strength reduction is developed in the area surrounding the tunnel, and swelling pressure is exerted on the initial lining. This method is able to match the results of convergence monitoring. Numerical simulations show that the original initial support...

... pillar strength proceedings excavation grc reaction curve criteria strength convergence src stiffness ground reaction curve pillar deformation pillar deformation ARMA 21 1238 Support Design Using the Ground Reaction Curve and Support Reaction Curves at Underground Limestone Mines...

... surveys and convergence measurements) and from embedded sensors (deformation and pore pressure measurements). Different sensors, from extensometers and inclinometers to fiber optics and deformation gauges, will be installed. A multi-physical assessment of the fracture network around the intersection...

... ABSTRACT: Tunnels constructed in soft rock and high field stress show significant gradual convergence with even after the excavation. This paper proposes a new visco-elastic-plastic solution for deep circular tunnel under squeezing conditions. The model is composed of Mohr-Coulomb plasticity...

... characterization extensometer maximum failure zone reservoir geomechanics displacement failure zone upstream oil & gas rmr development drift shotcrete mesh safety factor rock mass strength ground support turquoise ridge inflatable bolt convergence excavation convergence rate ARMA 20 1712...

... investigation into the utilization of the GRC and SRC for the design of mine pillar support systems with respect to anticipated pillar loading and opening convergence. metals & mining Ground Control international conference Morgantown reservoir geomechanics convergence pillar load grc approach...

... active mining. Cutter roof formation is also prevalent in the monitored area, and the location and severity of this damage can be easily tracked. Most damage to the roof was observed after failure had occurred, but at two locations convergence was detected that has not yet resulted in failure...

... geology displacement halite operational safety reamed interval wellbore integrity Upstream Oil & Gas numerical simulation wellbore closure time closure time underbalance rock salt geomechanical numerical simulation creep axi-symmetric model convergence differential stress well barrier...