When the single hydraulic prop is used in the working face, the following operations should be completed carefully according to the requirements:
1. The working face of hydraulic prop is not allowed to be mixed with props of different properties.
2. According to the specifications of support design, strictly pay attention to and check the specifications and quality of support to ensure the horizontal and vertical alignment. Unqualified pillars must be checked, corrected and replaced.
3. Blasting is not allowed in the adjustable props working face with single prop. If blasting is necessary in the working face, effective measures shall be taken to prevent damage to the single hydraulic prop, and the measures shall be reported to the chief engineer of the mine for approval.
4. The adjustable props of working face should be used together with the top beam.
5. After the lifting work is completed, it is necessary to ensure that the prop reaches the rated initial support force.
6. If it is found that the working face adjustable props is "crushed", it is strictly forbidden to use blasting or mechanical force to withdraw. To lay a good temporary pillar, through the top, undercover method to take it out.
7. The one-way valve and liquid injection nozzle should be cleaned by liquid injection gun before the support. After there is no pulverized coal contamination, the liquid gun should be inserted into the three-way valve. After the connection is completed, the liquid supply should be started.
