According to production needs, the air door wall must be dismantled manually. If manual dismantling is difficult, blasting must be used to dismantle it. In order to ensure safety during the blasting and demolition of the air door wall, a special method for dismantling the air door wall has been developed. The safety measures are as follows: 1. Before dismantling the damper wall, the person responsible for the dismantling must use reliable methods to cover the feng shui pipes and cables in the tunnel within 20m in front and behind the damper wall. If necessary, the cables and feng shui pipes can be buried on the ground. And lay no less than 50mm thick wooden boards and old belts on the ground cables and Feng Shui pipes for protection. 2. When blasting, explosives must be loaded into the reserved gun channel on the wall of the air door. It is strictly prohibited to use the method of blind cannon for blasting operations. 3. If the reserved gun channel cannot be found on the wall of the air door, you can use an air coal drill to drill blasting holes on the wall of the air door, and then charge and blast. However, the minimum resistance line of the blasthole shall not be less than 300mm. 4. Before charging, the reserved gun channels and drilled blast holes must be cleaned of debris and drill chips. No debris should be left in the blast hole. 5. When loading, the amount of powder charged in a single hole should not exceed 150g.
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