Possibility of using the smoothed spline functions in approximation of average course of terrain inclinations caused by underground mining exploitation conducted at medium depth

International Conference on Applied Sciences 2017

Orwat, J.^1

Silesian University of Technology, Department of Mining and Geology, Akademicka street, no. 2, Gliwice

44100, Poland^1

关键词: Average values;    Random scattering;    Spline functions;    Standard deviation;    Terrain inclinations;    Theoretical values;    Typical values;    Underground mining;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/294/1/012029/pdf
DOI  :  10.1088/1757-899X/294/1/012029

来源: IOP

【 摘 要 】

In this paper was presented an obtainment way of the average values of terrain inclinations caused by an exploitation of the 338/2 coal bed, conducted at medium depth by four longwalls. The inclinations were measured at sections of measuring line established over the excavations, perpendicularly to their runways, after the termination of subsequent exploitation stages. The average courses of measured inclinations were calculated on the basis of average values of measured subsidence obtained as a result of an average-square approximation done by the use of smooth splines, in reference to their theoretical values calculated via the S. Knothe's and J. Bialek's formulas. The typical values of parameters of these formulas were used. Thus it was obtained for two average courses after the ending of each exploitation period. The values of standard deviations between average and measured inclinations σIand variability coefficients of random scattering of inclinations MIwere calculated. Then they were compared with the values appearing in the literature and based on this the possibility evaluation of use smooth splines to determination of average course of observed inclinations of mining area was conducted.