选择液化石油气加氧气为气相起爆系统新型混合气源，对其在细长管道内传爆性质进行实验研究。结果表明，新气源在内径３ｍｍ长度５００ｍ的细长塑料管道内，经激爆形成的爆轰波传爆可靠，爆速达２５００ｍ／ｓ，其尾部能可靠激爆多根分叉导爆管；爆轰淬熄直径为０７ｍｍ。气相起爆器采用气体配比、混合、反射增压、防爆等装置的系统设计是可行的。 Select liquefied petroleum gas and oxygen as the new type of gas mixture in the gas phase detonation system, and conduct an experimental study on its propagation in an elongated tube. The results show that the detonation wave generated by the blasting explosion is reliable and the detonation velocity is up to 2500m / s in the slender plastic pipe with the inner diameter of 3mm and the length of 500m. The bifurcated detonator can reliably detonate the tail of the new gas source. Detonation quenching diameter of 0  7mm. Gas phase detonator gas ratio, mixing, reflection pressurization, explosion-proof system design is feasible.