1 Check the integrity of the feng shui pipeline, material conveying pipe, shotcrete machine and its connections.
2. Cables, pipelines, air ducts and various equipment and equipment at the shotcrete site should be well protected and covered, and the sprayed surface should be cleaned with high-pressure air and water.
3. Comprehensively check whether the cross-section size of the roadway and the mid-waist line meet the design requirements, and set five shotcrete side lines.
4. The artificially stirred mixture must be uniform, the ratio is correct, and it must be sieved twice.
