The monitoring and analysis of mining pressure on shallow buried deep and large mining heigh

In view of the present situation and characteristics of the shallow burial depth and high cutting coal mining face in Yanfjiacun mine,we used the KJ216 type mine observation equipment to observe and analysis the coal layer pressure on the 222203 coal mining face in Yanfjiacun Mine.The results showed that when the mine initial pressurized Pressure phenomenon was obvious,and supporter pressure roof pressure was bigger than the Rated resistance of support,the periodical weighting step distance of coal mining face was ranging from 8.5m to 17.5m.Meanwhile the roof breaking was rather obvious,and surface collapsing was violent,ground fissures almost perpendicular to the working face.This study provide a reliable basis of experimental data and strength to the strata behaviors of the shallow burial depth and high cutting coal mining face and roof controlled.