Abstract: Using the top dynamic monitoring system KJ216 of Uroica company，the mine pressure monitoring of the 1st east working face of the 13th seam axis working face in Da′anshan coal mine is made.Through analyzing the monitoring results，the mine pressure behavior law of fully-mechanized face having gently inclined seam with complicated geological structure is obtained，which ensures the safe mining of working face and provides the scientific basis for the similar face.The monitoring results show that the average first weighting length is 52.67 m，the average periodic weighting length is 22.12 m，the range of stress increasing in front of the face is 8~16.2 m and 5.2~13.6 m and the average peak of stress increasing is 24 MPa and 23.57 MPa as the pressure changes，and the mine pressure at the middle of the face is obviously higher than the upper and the lower part.

Key words: Coal mine, Mine pressure behavior, Pressure law, Mine pressure monitoring