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3D topographic stress perturbations and implications for ground control in underground coal mines
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
  • Ashley W. Griffith, University of Akron Main Campus
  • James Becker, University of Akron Main Campus
  • Krysta Cione, University of Akron Main Campus
  • Tim Miller, University of Akron Main Campus
  • Ernian Pan, University of Akron Main Campus
Document Type
Article
Publication Date
9-1-2014
Disciplines
Abstract
It is well known that the perturbed stress field beneath valleys can result in roof instabilities in shallow underground coal and stone mines. Quantitatively predicting the magnitude of these stress perturbations, particularly beneath complicated three-dimensional (3D) topography, has not become commonplace in mine planning, perhaps due to the complexity and time-consuming nature of the problem. Here we utilize 3D digital elevation models and the 3D boundary element method (BEM) approach to efficiently calculate the pre-mining topographically perturbed stress field in the vicinity of the Carroll Hollow coal mine in eastern Ohio. We find that regions of elevated compressive stress in the mine correspond to areas in which cutter roof failure is a common source of roof instability. Furthermore, both the magnitude and inclination of the principal stresses calculated from the 3D topographic BEM model are found to be consistent with observed failure distributions within the mine. We propose that the approach outlined in this study can be efficiently applied to the mine planning process in order to mitigate or avoid potentially hazardous mining conditions. (C) 2014 Elsevier Ltd. All rights reserved,
Citation Information
Ashley W. Griffith, James Becker, Krysta Cione, Tim Miller, et al.. "3D topographic stress perturbations and implications for ground control in underground coal mines" INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES Vol. 70 (2014) p. 59 - 68
Available at: http://works.bepress.com/ernian_pan/11/