Abstract:
The gob-side entry with small coal pillars is significantly influenced by rock burst and mining of adjacent coal face. Therefore, it would be difficult for regular bolt-net-anchor combined support to control the deformation of small coal pillars and the stability of the roof. Based on the characteristics of roadway stress and surrounding rock deformation, an integrated maintenance technology "three-reinforcement" including reinforcement of mine pressure monitoring and forecast, reinforcement of pressure relief of the surrounding rock in the roadway and reinforcement of the structural strength of support is proposed in this study. This technology effectively combines monitoring and forecast, surrounding rock pressure relief and support. In addition, the bolt-net-anchor support parameters were optimized and bolt-anchor bottom supplement support and Malisan grouting were utilized at special sections. Thus, the stability of the advancing mining gob-side entry with strong pressure could be maintained.