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Back-Calculation Method for Estimation of Geomechanical Parameters in Numerical Modeling Based on In-Situ Measurements and Statistical Methods

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  • Karolina Adach-Pawelus

    (Faculty of Geoengineering, Mining and Geology, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

Abstract

An important element of numerical modeling for specific mining issues is the selection of model parameters. The incorrect determination of geomechanical parameters can result in significant calculation errors carried throughout the entire problem. This paper presents a method for determining effective geomechanical parameters for technological and residual pillars through the use of numerical modeling, specifically, back-calculation. This is based on the results of numerical simulations, measurement data (e.g., excavation convergence measurements), and statistical methods (a non-linear regression model with “dummy” variables). The result is that appropriate parameters of pillars are set out iteratively so that the displacements of selected points in the numerical model correspond (with some approximation) to the results of mine measurements. The procedure of determining pillar parameters is presented using a case study of one mining field in an underground copper mine, where the deposit is mined using the room and pillar system. Numerical calculations were performed using a Phase2 v. 8.0 program (Rocscience, Toronto, Canada), while statistical calculations used a Statistica computer program. The results of excavation convergence measurements performed in the analyzed mine have been applied. This paper shows that for the presented method, the resulting matching of theoretical values of convergence determined numerically for specified pillar parameters to in-situ results of convergence measurements, is very good (R 2 = 0.9896). This work exemplifies a set of the parameters of pillars for an elastic model of rock mass, but this method can also be applied to other models.

Suggested Citation

  • Karolina Adach-Pawelus, 2022. "Back-Calculation Method for Estimation of Geomechanical Parameters in Numerical Modeling Based on In-Situ Measurements and Statistical Methods," Energies, MDPI, vol. 15(13), pages 1-17, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4729-:d:850425
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    References listed on IDEAS

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    1. Karolina Adach-Pawelus & Daniel Pawelus, 2021. "Influence of Driving Direction on the Stability of a Group of Headings Located in a Field of High Horizontal Stresses in the Polish Underground Copper Mines," Energies, MDPI, vol. 14(18), pages 1-13, September.
    2. Karolina Adach-Pawelus & Daniel Pawelus, 2021. "Application of Hydraulic Backfill for Rockburst Prevention in the Mining Field with Remnant in the Polish Underground Copper Mines," Energies, MDPI, vol. 14(13), pages 1-17, June.
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    Cited by:

    1. Marat M. Khayrutdinov & Vladimir I. Golik & Alexander V. Aleksakhin & Ekaterina V. Trushina & Natalia V. Lazareva & Yulia V. Aleksakhina, 2022. "Proposal of an Algorithm for Choice of a Development System for Operational and Environmental Safety in Mining," Resources, MDPI, vol. 11(10), pages 1-16, September.

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