Two- and three-dimensional calculations of scaled in situ tests using the M-D model of salt creep

Munson, D.E.; Weatherby, J.R.; DeVries, K.L.

doi:10.1016/0148-9062(93)90120-3

Cited by 10 publications

(5 citation statements)

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“…Either reductions in pore pressure after mining or abnormally low post-mining pressures (Le., well below undisturbed lithostatic pressure) were, in fact, observed at all boreholes with the exception of QPP12. Munson et al (1993) at 3.5 yr after mining for each borehole location as a function of I radial distance from the Room Q axis. Also plotted are the higher of: 1) interpreted post-mining testzone pressures; 2) extrapolated post-mining guard-zone pressures; or 3) test-zone pressures measured in March 1995 (Appendix B).…”

Section: Stress Changes Around Room Qmentioning

confidence: 99%

“…Ehgartner (1990) numerically simulated the stress field at the approximate locations of the boreholes during excavation of Room Q. Munson et al (1993) also simulated the stresses around Room Q as a function of time. The stress modeling was performed using a finite-element code that implemented the Munson-Dawson model (Munson and Dawson, 1979) to calculate the transient deformation of the evaporites.…”

Section: Mechanisms and Processes Affecting Salad0 Properties Around mentioning

confidence: 99%

“…Therefore, the rapid changes in borehole pressures during the mine-by were probably due to the instantaneous stress changes occurring in the rock. Munson et al (1993) modeled the evolution of the stress field around Room Q with time. The calculated stresses at the borehole locations are presented in Figures 8-1 through 8-3.…”

Section: Stress Changes Around Room Qmentioning

confidence: 99%

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Hydraulic testing around Room Q: Evaluation of the effects of mining on the hydraulic properties of Salado Evaporites

Domski¹,

Upton²,

Beauheim

1996

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Section: Stress Changes Around Room Qmentioning

confidence: 99%

Section: Mechanisms and Processes Affecting Salad0 Properties Around mentioning

confidence: 99%

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Hydraulic testing around Room Q: Evaluation of the effects of mining on the hydraulic properties of Salado Evaporites

Domski¹,

Upton²,

Beauheim

1996

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“…A triaxial compression rheological test is often conducted during the rock’s rheological experiment to better understand its stress state. This test provides information on the rocks’ mechanical properties 28 and allows for the establishment of a suitable rheological constitutive model and the determination of rheological parameters for numerical analysis of the rock’s rheology. Therefore, a creep constitutive equation of rock under 3D stress must be established.…”

Section: Promotion Of 3d Creep Model Parameter Determinationmentioning

confidence: 99%

Determination of the parameters of rock viscoelastic creep model and analysis of parameter degradation

Zheng

Pan

2023

Sci Rep

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Different stress creep tests are conducted on the sandstone in this study to better describe the creep properties of rocks under different stress states. A model that describes the rock creep process is established. The various stages of creep can be described by combining the creep properties of the creep elements of the model. A new method for determining creep parameters is proposed by using the special point on the creep curve and the definition of creep deformation. The relationship between the creep parameters, stress, and time is analyzed. An improved creep model that considers the effects of stress state and time on the creep parameters is developed. This model is verified using experimental data and calculation results. Results shows that the improved creep model better describes the creep properties of rocks and provides a new method for determining future model parameters. The shear modulus of elastic model controls the instantaneous deformation. The shear modulus of viscoelastic model governs the limit of viscoelastic deformation. The shear viscoelastic coefficient of viscoelastic model increases with the increase in stress. The coefficient of viscoplastic model controls the viscoplastic creep rate. The coefficient of a nonlinear Newtonian dashpot mainly controls the accelerated creep deformation of rock. The calculation results of the proposed model agree well with the experimental data under the action of different stress levels. This model accurately reflects the creep characteristics of the primary and steady-state creep stages, and overcomes the shortcomings of the traditional Nishihara model in describing accelerated creep.

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“…To develop a snow plow model, damage around an excavation must be determined. Munson et al (1993) and Munson et al (1996) have predicted salt creep, fracture and damage around WIPP underground excavations using the Multimechanism Deformation Coupled Fracture (MDCF) model (Chan et al, 1992). The MDCF model is an extension of the Modified Multimechanism Deformation (M-D) steady-state creep model with work-hardeninglrecovery transients proposed by Munson et al (1 989).…”

Section: --mentioning

confidence: 99%

Modeling brine inflow to Room Q: A numerical investigation of flow mechanisms

Freeze¹,

Christian-Frear²,

Webb³

1997

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A hydrologic modeling study was performed to gain insight into the flow mechanisms around Room Q. A summary of hydrologic and structural data and of predictive fluid flow models from Room Q are provided. Six years of measured data are available from the time of excavation. No brine accumulation in Room Q was measured in the first two years following excavation. However, there is considerable uncertainty associated with this early-time data due to inadequate sealing of the room. Brine may have been lost to evaporation or it may have flowed into newly created disturbed rock zone (DRZ) porosity resulting from excavation. Non-zero brine accumulation rates were measured from 2-5 years, but brine accumulation within the room dropped to zero after 5.5 years. A conceptual model for brine inflow to Room Q was developed which assumes far-field Darcy flow combined with an increasing DRZ pore volume. Numerical simulations employed TOUGH28W and used predictive DRZ porosity increase with time from SPECTROM-32 rock deformation simulations. Simulated brine inflow showed good agreement with measured brine accumulation rates for the first five years. Two important conclusions were drawn fiom the simulation results: (1) early-time brine inflow to the room can be reduced to zero if the DRZ pore volume increases with time, and (2) brine accumulation (inflow) rates fiom 2 to 5 years suggest a far-field permeability of 5 x m2 with a bulk rock compressibility of 5.4 x 10-I2 Pa-I. The early-time brine inflow to the DISCLAIMER This report was prepared as a n account of work sponsored by a n agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disdased, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or sern'ce by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necesSarily state or reflect those of the United States Government or any agency thereof.. Greg Ruskauff of INTERA Inc. for performing many of the TOUGH28W numerical simulations; Kerry DeVries of RE/SPEC Inc. for his time and efforts providing results from SPECTROM-32 simulations; Rick Bower of TechReps Inc. for providing Room Q data;

show abstract

Two- and three-dimensional calculations of scaled in situ tests using the M-D model of salt creep

Cited by 10 publications

References 1 publication

Hydraulic testing around Room Q: Evaluation of the effects of mining on the hydraulic properties of Salado Evaporites

Hydraulic testing around Room Q: Evaluation of the effects of mining on the hydraulic properties of Salado Evaporites

Determination of the parameters of rock viscoelastic creep model and analysis of parameter degradation

Modeling brine inflow to Room Q: A numerical investigation of flow mechanisms

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