Computation of influence functions for automatic mining subsidence prediction |
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| Authors: | M?E?Díaz-Fernández Email author" target="_blank">M?I?álvarez-FernándezEmail author A?E?álvarez-Vigil |
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| Institution: | (1) Department of Mining Engineering, Mining Engineering School, University of Oviedo, Independencia 13, 33004 Asturias, Spain;(2) Department of Construction Engineering and Manufacturing, Mining Engineering School, University of Oviedo, Independencia 13, 33004 Asturias, Spain;(3) Department of Mathematics, Mining Engineering School, University of Oviedo, Independencia 13, 33004 Asturias, Spain |
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| Abstract: | This paper presents a computer tool that automatically predicts mining subsidence using the generalized n-k-g influence function detailed in (González Nicieza et al. Int J Rock Mech Min Sci 42(3):372–387, 2005). This function depends on two physical concepts: the first is gravity, which characterizes the forces acting on the ground,
and the second, the convergence of the roof and floor of the mine workings due to the stress state of the ground. The developed
tool also allows other influence functions to be used to predict subsidence, namely the spatial influence function (Ramírez
Oyanguren et al. 2000) and the normal-type classical (Knothe, Arch Gór Hut 1, 1952) and modified (González Nicieza et al. Bull Eng Geol Environ 66(3):319–329, 2007) time functions. Moreover, the inputting and periodic updating of data from subsidence monitoring surveys is controlled by
one of the tool’s modules using a method that minimizes errors resulting from time discontinuities in landmarks measurements.
In addition, when actual landmarks measurements exist, the developed tool allows calibration of the subsidence parameters,
minimizing the errors between actual measurements and those obtained by prediction. The tool includes a viewer, developed
using OpenGL, which enables the results of the calculations carried out to be viewed, allowing the point of view to be varied.
It also includes the option of viewing and saving the results of the calculations carried out over the original topographic
plane defined in the AutoCAD DXF data file format. The efficacy of the tool is demonstrated via its application to a real
case of mining work carried out in a village in the Principality of Asturias, Spain. |
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