Abstract: Taking 40111 fully mechanized caving face of a coal mine in Shaanxi Binchang Mining Area as the background, the study made mine pressure law simulation during the mining cycle process by FLAC according to the actual geological condition and the extraction conditions, and compilied field monitoring scheme of mine pressure law. The observed results show that the first weighting interval of 40110 face was 83.3~100.8 m, the first weighting interval of roof was about 91.2 m, periodic weighting interval was 40~ 65.6 m, the average value of periodic weighting interval was about 55.5 m.