Aiming at the dynamic stress changes of roadway driving along goaf in mine

we use the method of drill cutting to get the dynamic change characters of seam stress along the strike direction of roadway and analyzed the variation characteristics of roadway driving along next goaf in Zhangshuanglou Coal Mine. According to the observation and analysis

it is shown that the peak of coal stress affected by lithology

geological structure and the "O-X" broken feature of roof

appears periodically; and the cycle length is equal to the periodic weighting step distance. Effected by the stress state of surrounding rock

the new stress distribution induced by the roadway excavation and the overlying strata movement

the solid stress of coal in roadway driving along goaf varied with reduction

increase or transfer. The stress variation characteristics can be used to guide pressure relief plan of rockburst and rockburst prevention and control work significantly.