As we all know, there are certain risks in the construction process. We should try our best to avoid potential safety hazards. Let's introduce the safety requirements and measures in the use of hollow grouting anchor bolt.

1. During construction, the working state of support shall be inspected regularly and irregularly. In sections with unfavorable geology, special personnel shall be assigned to inspect each shift.

2. When the construction is suspended, the support shall be directly against the excavation surface.

3. The simple bench of hollow grouting anchor bolt shall be placed stably.

4. In case of blockage or burst of air, water and material conveying pipelines during operation, the conveying of air, water and materials must be stopped in turn.

5. In the monitoring and measurement of hollow grouting anchor bolt support system, remedial measures should be taken when dangerous situations such as deformation and cracking of support system are found. When the danger is critical, the personnel shall be evacuated from the dangerous area.

6. In case of large deformation or bolt failure in the anchored section, the reinforced bolt shall be added in the section immediately, and the length shall not be less than 1.5 times of the original bolt length.