Research results show that the subsidiary folds in the Burte mine were settled under NNE-SSW compression stress in Yanan Formation during late Jurassic, which occurred in shallow structural layer.

And some research on problems of small fault, small fold, character of roof rock,seam and so on are analyzed in order to strengthen technological management and realize high production and efficience of coal face.

Normal fault plane pattern and associated fold in upside and their meaning in oil-gas exploration;