Roof Structure Characteristics and Support Resistance Determination of Working Face with Large Dip Angle

In view of the difficulty of stope surrounding rock, taking 3313 working face as background, the stope roof structure is analyzed through theoretical study and the mine pressure behavior laws of 3313 working face are analyzed by using FLAC^3D. What’s more, combined with the features of stope roof structure, the support capacity is calculated. The result shows that: considering the early failure of upper beam and dip angle of coal seam, the work face can be divided into solid filling zone, surrounding stable zone and bending subsidence zone and instability zone; the stress concentration coefficient of the upper part, middle part and bottom part working face is 1.95, 1.88 and 1.74, respectively, which indicates the mine pressure behavior of upper-middle part working face is severe; when roof weighting appears, the support working resistance of upper part working face is larger than that in the middle part and the support working resistance of middle part of working face is larger than that in the bottom, besides, the support capacity of 6 000 kN is determined.