摘要
Fry analysis was employed to study the spatial distribution patterns of known coal occurrences in Chengde region. The authors concluded that the orientation of all occurrences were in line with that of main fault zones. Zone A with more occurrences than other places was chosen to be compared with the whole region in terms of fractal dimensions of faults and known occurrences. It was concluded that the main fault belts played a controlling role in the orientation of coal layers, whereas the formation of the coal was affected by some factors like the structure, paleogeography and paleoclimate.