Abstract: 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.