Research on the Decompression Effects of Shaft Explosion-Proof Door at Different Lifting Heights

To study the decompression effects of shaft explosion-proof door at different lifting heights, this paper designed gas explosion testing system. Based on test results, made a numeric analysis change regularities shock wave overpressure when was lifted heights. Finally, determined proper height and put forward active concept. The research showed that (1) decreased in power exponential relationship as increased. When increased from 0 cm to 5 cm, peak 36.06 kPa 22.47 kPa, dropping by 37.7%. it 40 dropped 11.20 reached 68.9%. (2) ventilator ratio maximum 18.4%. After that, effect became worse worse. (3) could depressurize protect but with limited effects. maximum, suggested pressure sensor set up somewhere mine where is likely occur. In way, sensed time be actively for decompression. This great guiding significance optimizing design equipment, reducing loss accidents well carrying out emergency rescue.