When you buy back the single hydraulic prop, don't operate blindly, be sure to follow the correct operation method, so as to use the steel acrow props safely.
1. In case of "crushing" of working face steel acrow props, it is strictly forbidden to collapse by blasting or withdraw by mechanical force. To lay a good temporary acrow prop, through the top, undercover method to take it out.
2. The one-way valve and injection nozzle should be cleaned by injection gun before the support. If there is no pulverized coal contamination, insert the liquid gun into the three-way valve and start to supply liquid after connection.
3. The acrow prop should be perpendicular to the roof.
4. The liquid pressure of the hydraulic pump station should be stable to prevent the acrow prop unloading valve from overflowing or being placed on the injection nozzle of the adjustable props when the injection gun is pulled out.
5. After the liquid injection of the single hydraulic prop, the liquid injection gun should be placed on the handle of the acrow prop or on the injection nozzle.
6. When the pole is moved, there must be at least two people to operate. One person will put the prepared monomer into the adjustable props nest dug against the big wall, and plant the middle roof in advance. The two monomer columns should be filled firmly with coal, and the other person will discharge and unload the monomer on the side of the old pond.
7. Don't knock with metal objects on the working face. Hammer and pick the three parts of the adjustable props, especially the chrome coating. Otherwise, it will produce pits and the coating will peel off, which will damage the prop performance and will be scrapped all the time.
8. When the adjustable props is not supported, it is not allowed to place the prop horizontally and use the push jack. Especially, it is not allowed to use the support handle as the fulcrum of the push jack, otherwise a large number of adjustable props will be damaged.
