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

中文翻译：

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不同提升高度下竖井防爆门的减压效果研究

为研究竖井防爆门在不同提升高度下的减压效果，设计了气体爆炸试验系统。根据试验结果，数值分析了竖井防爆门在不同高度提升时冲击波超压的变化规律。最后，本文确定了井道防爆门的适当提升高度，并提出了主动减压概念。研究表明：（1）防爆门处的冲击波超压随着提升高度的增加呈幂指数关系下降。当提升高度从0 cm增加到5 cm时，防爆门处的峰值超压从36.06 kPa下降到22.47 kPa，下降了37.7%。当它被提升到 40 厘米的高度时，超压降至11.20 kPa，减压达到68.9%。(2) 随着提升高度的增加，呼吸机的超压呈幂指数关系下降。当防爆门的提升高度从0厘米增加到5厘米时，减压比最大达到18.4%。之后，减压效果越来越差。(3)防爆门在瓦斯爆炸时对通风机起到降压和保护作用，但作用有限。为了最大限度地保护通风机和防爆门，建议将压力传感器设置在可能发生瓦斯爆炸的矿井中。这样，及时感知到爆炸，主动提起防爆门进行减压。