    (1) Main points of acceptance work of alluvial excavation engineering
    Temporary support is an important part of the construction organization design and operation procedures, which has an important impact on construction safety. Therefore, acceptance emphasizes compliance with the requirements of construction organization design and operation procedures.
    The excavation specifications of the impact layer are not allowed to be dug, and the deviation of the over-excavation amount is between 200 and 400 mm depending on the construction method and the wellbore form.
    (2) Key points for acceptance inspection of bedrock and naked shaft roadway excavation works
    The main control items for the acceptance of bedrock excavation project include smooth blasting during blasting construction, which requires reasonable blasting operation procedures (blasting charts and instructions) and adapt to the changing conditions of surrounding rock; strict requirements are required for blasting construction.
    The deviation of the excavation specifications of the bedrock excavation is not more than 30mm, and the amount of over-excavation is between 150~250mm according to the form of the well. For the excavation of soft rock (including the broken belt), the excavation is not required; the slope deviation of the excavation is Soil 1%0. The specification deviation of the tunneling section such as the vertical wall seat, the roadway ditch, and the equipment base shall comply with the corresponding requirements of the specification.
    Naked roadway excavation uses smooth blasting, and the eye mark rate of the surrounding eyes should not be less than 60%. The allowable deviation of the excavation specifications of the narrow roadway is smaller than that of the general bedrock excavation, and the allowable deviation of the slope of the roadway is consistent with the bedrock of the bedrock.
    Temporary support is an important part of the construction organization design and operation procedures, which has an important impact on construction safety. Therefore, acceptance emphasizes compliance with the requirements of construction organization design and operation procedures.
    The excavation specifications of the impact layer are not allowed to be dug, and the deviation of the over-excavation amount is between 200 and 400 mm depending on the construction method and the wellbore form.
    (2) Key points for acceptance inspection of bedrock and naked shaft roadway excavation works
    The main control items for the acceptance of bedrock excavation project include smooth blasting during blasting construction, which requires reasonable blasting operation procedures (blasting charts and instructions) and adapt to the changing conditions of surrounding rock; strict requirements are required for blasting construction.
    The deviation of the excavation specifications of the bedrock excavation is not more than 30mm, and the amount of over-excavation is between 150~250mm according to the form of the well. For the excavation of soft rock (including the broken belt), the excavation is not required; the slope deviation of the excavation is Soil 1%0. The specification deviation of the tunneling section such as the vertical wall seat, the roadway ditch, and the equipment base shall comply with the corresponding requirements of the specification.
    Naked roadway excavation uses smooth blasting, and the eye mark rate of the surrounding eyes should not be less than 60%. The allowable deviation of the excavation specifications of the narrow roadway is smaller than that of the general bedrock excavation, and the allowable deviation of the slope of the roadway is consistent with the bedrock of the bedrock.
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