Explosion-proof doors are primarily used at the intake shafts of mines. In the event of an underground explosion, the resulting shock wave will forcefully propel the door outward, thereby releasing and mitigating the impact of the shock wave in the inclined airshaft.

During the installation of the explosion-proof door for the inclined shaft, it shall be installed in accordance with the prescribed installation procedures, ensuring that the door is plumb and level after installation and operates smoothly. Subsequently, the explosion-proof door shall be closed, and Shandong Zhongmei shall place the stop bars on the fixed brackets on both sides of the door frame, then backfill the area beneath the outer door with sand, gravel, or soil to a depth of 10 centimeters.

First, measure and verify the width and height of the tunnel entrance to ensure that the explosion-proof door—complete with its embedded components—can be fully accommodated. Lay the two door leaves flat on the ground, align and secure the sealing rubber gasket between them using bolts, and then position the assembly for installation. Adjust the door’s orientation so that it can only open outward, and then simultaneously lift both door leaves upright and place them against the shaft opening.

After proper adjustment, secure the entire door using wooden shims. Proceed with masonry work to anchor the wall according to the wellhead design. Once the masonry has fully set, close the explosion-proof door, place the locking bar on the mounting brackets on both sides of the door frame, and backfill the space beneath the outer door with sand, gravel, or soil to a depth of 10 centimeters. The door is then ready for normal operation.

Any areas where rust-preventive coating has peeled off or been knocked away shall be promptly recoated. If the sealing rubber strips are damaged or have delaminated, they shall be replaced or re-adhered without delay; the recommended replacement interval for sealing strips is approximately two years. Any rust on the door hinge pivot points shall be thoroughly cleaned and then re-lubricated.