Main Roof Broken and Falling of Coal Mining Face Connected to Dislocation Seam and Main Roof Classification

With the theoretical analysis and the summarization on the similar simulation experiment phenomenon,base on the definition and features of direct roof and the main roof and taking the elastic thin plate mechanics and the key strata theory as the study base,the scientific classification was conducted on the roof of the connected face for the full seam mining method with the layout of the dislocated seam gateway.In combination with the comprehensive analysis on the factors affected to the main roof broken,falling and others,a scientific judgment relationship established in the coal face length factor and the main roof pressure behaviors to provide certain theoretical basis to the actual production.