Mine Shaft Door
mine shaft door
The mine shaft door is a core safety device installed at the mouth of vertical or inclined air shafts. Its main function is to automatically isolate the airflow channel between the shaft and the ground when the fan stops operating or when disasters such as explosions and fires occur in the mine.Protecting the main ventilation fan from damage . This door adopts a heavy-duty steel structure , which can adapt to different shaft diameters and ventilation pressures, .
The mine shaft door is equipped with a hydraulic drive and counterweight balance system, which remains tightly closed during normal fan operation . When the fan stops or the pressure in the shaft suddenly increases, it will automatically open to release pressure. High-temperature resistant rubber sealing is used between the door body , effectively preventing gas and coal dust leakage. In addition, the mine shaft door supports remote monitoring.
| Parameter Type | Specific Parameters |
|---|---|
| Material | Door body: Q345B steel plate (12-16mm)/Door frame: I-beam/Sealing strip: High-temperature resistant nitrile rubber |
| Core Parameters | Adapt to shaft diameter 3-8m |
| Composition & Functions | Door body (impact resistance and sealing) |
| Features & Advantages | Dual protection of automatic pressure relief + manual emergency |
Construction & Maintenance Key Points
Reinforce support at the junction of the crosscut and shaft to prevent fissure water infiltration, using combined support technologies like anchor injection.
Strictly control section dimension deviations during construction to ensure safe operation of hoisting equipment.
Regularly inspect concrete support structures and repair cracks or deformations promptly.
Installation Step
-
Customize the door body according to the shaft size, pour concrete foundation at the shaft mouth and embed fixing bolts.
-
Install the door body and hydraulic pump station, connect hydraulic pipelines and control system.
-
Debug the negative pressure adsorption and automatic opening and closing functions to ensure that the opening pressure matches the shaft ventilation parameters.
-
Conduct pressure test to verify sealing performance and emergency response speed.
Operation Steps
1. Observe the door body sealing state and pressure parameters through the monitoring system during daily operation;
2. When the fan stops, confirm that the door body automatically opens to release pressure, ;
3. In emergency situations, it can be forced to open/close through the manual hydraulic pump or on-site control button;
4. Check the sealing rubber strip and hydraulic oil level every six months, and conduct a pressure test every year.
Hot Tags: mine shaft door, China mine shaft door manufacturers, suppliers, factory, Mine Door, Mining Balanced Pressure Free Vent Door, Vent Mine Door for Mining, Mine approved Pressure Free Air Door, Air Door for Mining, Air Door Electric Control Device
You Might Also Like
Send Inquiry