The hydraulic prop is suitable for the mining face of inclined coal seam with a dip angle of less than 25 ° - 35 °. The conditions of coal seam roof and floor are as follows:
Backwardness of the roof does not affect the recovery of the adjustable props, the floor should not be too soft, and the depth of the adjustable props pressed into the floor does not deteriorate the integrity of the floor, otherwise, the adjustable props base should be increased.
When the hydraulic prop is used in the blasting face with soft coal quality, protective measures shall be taken for the coating surface of the movable pillar to prevent collapse.
When the hydraulic prop is used in combination with the wood roof beam or as a point column, the top cover shall be replaced with the column cap to avoid damaging the wood beam.
