Surrounding rock broken zone evolution law of high-intensity mining affectedroadway in shallow coal seam

In order to study the broken rock zone evolution law of mining affected roadway in shallow coal seam and to ensure the safe operation of coal mine underground reservoir, a typical high-intensity fully-mechanized mining face of shallow coal seam in Bulianta Coal Mine was choosed as the project background, and the intergrated research methods include theoretical analysis, numerical simulation and field measurement were carried out to analyze the stress and deformation characteristics for the mining affected rectangular roadway. The results indicated that the broken rock zone was developing with convex type which mainly concentrated in both sides of the shallow high-intensity mining roadway, and it was significantly affected by the side abutment pressure of goaf than the front abutment pressure of mining face, besides, the broken zone of pillar side was more serious than working face side in the roadway. The roadway was damaged worst at secondary recovery which impaction was combined with the mining and the recovery, and to ensure the long-term stability of the remaining coal pillars that the method of bolting and shotcreting with wire mesh was proposed. The research results provide a scientific basis for the safe operation of underground coal mine reservoir and the control of roadway surrounding rock with similar conditions.