Single hydraulic prop operation protection measures

When the single hydraulic prop is used on the working surface, the following operations must be completed as required:

1. The working faces of the single hydraulic props are not allowed to be mixed with pillars of different nature.

2, in accordance with the specifications of the support design, strictly pay attention to and check the quality of the support specifications, to ensure that the horizontal row, vertical line. Unqualified pillars must be checked for corrections and replacements.

3. The working surface of the single pillar is not allowed to shoot. If the working surface must be fired, it is necessary to prevent damage to the single hydraulic props and be approved by the chief engineer.

4. The pillars of the working face should be used in conjunction with the top beam for the “checking in the seat” and “card management”.

5. After the work of the column is completed, it must be ensured that the pillar reaches the rated initial support force.

6. If it is found that the pillar of the working face is “depressed”, it is strictly forbidden to use the artillery to collapse or to forcefully withdraw. To lay the temporary pillars, take them out by picking them up and undercover.

7, the front support pillars is provided to use a check valve gun injection and the injection nozzle washed clean of contaminants after the no coal powder, and then inserted into the liquor gun with three valves, the coupling is completed, starts the liquid supply.

8. Support the pillars to be perpendicular to the top plate. When there is a mountain angle, the angle of the mountain should be appropriate (usually 30 to 50), and the support should be firm to prevent the pillar from being pushed down. The pillar top cover and the top beam should be in close contact with each other. When the top cover is used, the four corner claws of the pillar top cover should be clamped in the side groove of the lace top beam to prevent the claw of the top cover from being placed on the top beam body or the top beam joint portion.

9. When lifting the column, first place the injection gun tube on the three-purpose valve injection valve, and hang the locking sleeve of the injection gun to operate the liquid injection gun handle. A high-pressure emulsion by injection gun to the liquid supply lumen struts, rapid increase in live column until strut cap with gold metal contacts the top beam, roof and close to the face so far.

10. The hydraulic pressure of the hydraulic pump station should be stable to prevent the pillar unloading valve from overflowing when the liquid injection gun is removed.

11. After the injection of the single hydraulic props, the liquid injection gun should be placed on the handle of the pillar, or placed on the injection nozzle of the pillar, not on the bottom plate, and can not be dragged on the bottom plate to prevent coal dust pollution. .

12. When the surface is moved, there must be at least two people to operate. One person puts the prepared monomer into the column nest that is dug by the big wall, and plantes the middle top in advance. The two single columns must be Filled with coal firmly, another person discharges the monomer on the side of the old pond. When unloading, first try to release the liquid to observe whether the top plate is stable. If the top plate is unstable and the falling phenomenon is serious, it must be back first. The top plate can only be unloaded after it has been stabilized. Then, the beam is moved to the new pole position stably and quickly, and the groove of the beam is required to completely coincide with the top of the column.

13. When returning to the column, insert the unloading handle into the unloading hole of the right valve cylinder of the three-way valve, rotate the unloading handle, and discharge the emulsion in the inner cavity of the pillar through the gap between the unloading valve, the right valve cylinder and the injection liquid, and spray it on The goaf of the working face, the living column is shrunk under the action of the self-weight and the return spring, thereby achieving the purpose of returning the column.

14, do not use metal objects striking face, iron pick hammer strike portions hydraulic prop, particularly chrome plating, else a pit, plating peeling even undermine the performance of scrap struts.

15. In the process of unsupported support, the pillars should not be placed horizontally for the jacks. In particular, the support handles should not be used as the fulcrum of the push-rod jacks, otherwise the pillars will be damaged in large quantities.

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