Second, the rectification plan: expansion section Third, the rectification sequence: rectification from top to bottom, until the hidden dangers are rectified. Fourth, the bracket material: 9# I-shaped steel trapezoidal shed support for permanent support, the length of not less than 1.2m thickness of not less than 5.0cm of the wooden back. V. Support specifications: upper net width: 1.5m, lower net width: 2.2m, net height: 2.0m. Sixth, the precautions in the rectification: 1. The need to use friction gold metal strut before expanding and reinforcing the original shed roof beams, reinforcing its range of not less than 6.0m, then, taken out and then back to help small plate between the original help shed opening to the desired cross section Excavate a column with a depth of not less than 20 cm for permanent support. 2. After the new bracket is erected, the original bracket can be withdrawn after the backing is completed. 3. The length of the small plate used for backing shall not be less than 1.2m, the thickness shall not be less than 5cm, and the number of small plates on each side shall not be less than 5. 4. The vacant part behind the small board is filled with incombustible vermiculite. 5. The remaining materials on the shift must be cleaned to ensure the cleanliness of the workplace. 6. When transporting outwards, it must be ensured that the manhole damper of the wind well is in safe operation.
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Safety technical measures for the rectification of the well shaft near the wellhead section
First, the hidden dangers: the roadway is narrow and the ventilation section is insufficient.