Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. X
Written by Mihai Valentin HERBEI, Roxana Claudia HERBEI, Florin SALA
The study analysed the phenomenon of diving (Div) and the diving distance (DivD) of the land under the influence of coal mining in the specific conditions of the Jiu Valley, Romania. 16 control points (CP1 to CP16) placed randomly on the study area were used. Measurements of control point coordinates (X, Y, Z coordinates) were made at a reference time (t0) and at an interval of 3 months (t1). ANOVA test confirmed the statistical safety of the data and the presence of variance in the data set (p≤0.001, F>>Fcrit, for Alpha = 0.001). The variation of the Div parameter according to Z1 and Z0 was described, in general conditions of statistical safety at the level of R2 = 0.999; p≤0.001. The variation of the Div phenomenon according to X0 and Z0 was described under reduced statistical safety conditions (p = 0.895). The variation of DivD according to Z1 and Z0 was described in statistical safety conditions at the level of R2 = 0.697, p = 0.0142, and according to X0 and Z0 it was described in statistical safety conditions at the level of R2 = 0.722, p = 0.0095. The cluster analysis led to the grouping of control points based on affinity, in relation to the values Div and DivD, in statistical safety conditions (Coph.corr = 0.850).
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