Design and Application of Advance Support Frame of Fully Mechanized Mining Crossheading in Carboniferous Ten Million Tons Coal Mine

In order to solve the problems of large advance pressure and hard support in working face return air crossheading of Carboniferous extremly thick seam during mining period.ZQL2 × 6000 /23 /45 and ZQL2 × 8000 /23 /45 roadway advance support frames are designed and applied in 8210 working face of Tashan coal mine.Underground tests show that the support group has larger support strength and better support effect than traditional support way of " single prop + articulated beam",which is conducive to the rapid progress of mechanized mining face and to achieve safe and efficient production.