Application of Hydraulic Support to the Working Face of Pitching Seam

At the fully-mechanized coal working face with the mining condition of pitching seam,the measures to prevent the hydraulic support to glissade and to incline down are proposed to improve the reliability of fullymechanized working face system based on demonstrating the unreliable factors of hydraulic support and analyzing the limit state of hydraulic support to glissade and incline down.