Reinforcement of Coal Roadway in Area of Bearing Stress and Irregular Coal Pillar Superposition
With the increase of coal mining depth,the requirements of coal mining on the layout of working face,mining methods and support strength were becoming stricter.Taking 3307 transportation channeling face of Dayang Coal Mine as the research object,the distribution law of supporting stress in surrounding rock and deformation and failure characteristics of irregular coal pillar in the roadway were studied by numerical simulation.Based on this,the surrounding rock of the new excavation roadway was reinforced to solve the reinforcement and support problem of the new excavation double coal roadways.The stability of surrounding rock was ensured by the targeted high-strength rock bolt(cable)support,and good support effect was obtained,which can provide reference for the same type of mine engineering.
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