Stability analysis of powered support and its control technology in inclined thick seam

Aimingfor the mining problems of 858inclined thick seam in Dahuangshan coalmine,adopting long wall with top coal caving was put forward.And after the stabilityanalysis on anti-dumping and anti-sliding of ZFS5200/17/32powered support,the dumping angle of ZFS5200/17/32powered support is 27°.Due to the average inclination of 858face is 25° and taking local changes into account,anti-dumping and anti-sliding measures should be taken.Besides,after the analysis on the key long wall withcoal caving parameters,thecutting height,theway and step distanceof top-coal caving were determined.Actual practice shows that 858faceachieved high production andhigh efficiency caving on the basis of ensuring support stability,which provides important realistic basis for similar face.