THE VARIABILITY OF INDICES OF ENGINEERING GEOLOGIC PROPERTIES IN COAL MEASURES ROCKS

The variability of physical and mechanical properties of various engineering geological types in the overburden and floor of coal seam No.3 in Jinshan coalfield,Shangdong Province,is studied in this paper.The Kolmogorov-mirnov tests for fitting of distribution show that the indices mainly fit logarithmic normal distribution.Moreover,the relationship among indices and the anisotropy of coal-measures rocks is preliminarily analyzed.The results are basis for probability research of coal mine engineering geology.