Characteristics of Strata Behavior of Shot Firing and Roof-coal with Large Inclined Angle

By strata control observation and numerical simulation in the first shot firing and roof-coal working face with large inclined angle in Lugou coal mine of Zhengzhou coal industry Co.,Ltd.,it has been obtained that the supports resistance distributed in resistance-diminishing status during the mining process in shot firing and roof-coal working face with large inclined angle,the supporting pressure along the incline showed " saddle shape",and the peak of the supporting pressure of head entry is higher than air tail entry’s.Therefore it’s difficult for roadway to maintain.