The supporting hydraulic prop should be perpendicular to the top plate.
When there is an uphill angle, the uphill angle must be appropriate (usually 30-50), and the adjustable props must be firm to prevent the acrow prop from falling down. The top cover of the adjustable props and the top beam should be in contact with each other tightly and smoothly. When using a top cover, the four-corner claws of the hydraulic prop top cover should be clamped in the side grooves of the lace top beam to prevent the claws of the top cover against the top beam body Upper or top beam joints.
When raising the acrow prop, first put the injection gun tube on the injection valve of the three-way valve, hang the locking sleeve of the injection muzzle, and then operate the injection gun handle.
The high-pressure emulsion is supplied to the inner cavity of the hydraulic prop through a liquid injection gun, and the movable pillar rises rapidly until the pillar top cover contacts the metal roof beam and is close to the top plate of the working surface.
The hydraulic pressure of the hydraulic prop station should be stable to prevent the adjustable props unloading valve from overflowing when the injection gun is removed.
After the injection of the single hydraulic prop is completed, the injection gun should be placed on the handle of the prop, or on the injection nozzle of the prop, not on the bottom plate, let alone dragging on the bottom plate, to prevent coal dust pollution .
When moving poles in the mining face, there must be at least two people to operate.
One person puts the prepared monomer into the column socket dug against the large wall, and planted the middle roof in advance. Both of these two monomer acrow prop Use coal to fill it firmly, and another person discharges and unloads the monomer on the side of the old pond. When unloading, first try to discharge the liquid to see if the roof is stable. If the roof is unstable and the phenomenon of ballast is serious, it must be backed up first. The top plate can be completely unloaded only after it is stable. Then move the beam to the new pole position steadily and quickly, and require that the groove of the ∏ beam and the top of the column completely coincide.
When returning to the acrow prop, insert the unloading handle into the unloading hole of the right valve barrel of the three-way valve, and turn the unloading handle. The emulsion in the column cavity is discharged through the gap between the unloading valve, the right valve barrel and the liquid injection, and sprayed on In the goaf area of the working face, the movable column is retracted under the action of its own weight and the return spring, so as to achieve the purpose of returning the column.
Do not hit the working face with metal objects or hammers on all parts of the hydraulic prop, especially the chrome plating layer, otherwise pits will occur, the plating layer will peel off, and the performance of the pillar will be damaged or even scrapped.
When the hydraulic prop is not supported, the pillar cannot be placed horizontally as a pushing jack. Pay special attention to not using the support handle as the fulcrum of the pushing column jack, otherwise it will damage the pillar a lot.
