Empirical methods of subsidence prediction a case study from Illinois

Journal Article · Mon Aug 01 00:00:00 EDT 1983 · Int. J. Rock Mech. Min. Sci. Geomech. Abstr.; (United States)

DOI:https://doi.org/10.1016/0148-9062(83)90940-3· OSTI ID:5421268

Hood, M

Subsidence profiles above two adjacent panels in Illinois are compared with profiles predicting subsidence behaviour obtained using: (1) the NCB method; (ii) the profile function method; and (iii) the influence function method. The NCB method predicts the maximum subsidence values at the centre of the troughs accurately, but the overall shapes of these predicted profiles do not match the profiles from the measured data well. Problems associated with calculation of surface curvatures from vertical displacement data are highlighted and a recommendation is made for future studies to consider direct measurement of parameter. A hyperbolic tangent profile function is shown to serve, as an accurate predictive tool for subsidence behaviour in 2 adjacent longwall panels at an Illinois mine. This function predicts not only vertical displacements, but also the surface curvature above both panels. Influence functions are shown to be more problematic, although potentially more flexible, in their application than the profile functions.

• OSTI ID: 5421268
• Journal Information: Int. J. Rock Mech. Min. Sci. Geomech. Abstr.; (United States), Vol. 20:4
• Country of Publication: United States
• Language: English

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