侧壁套管泄爆作用下瓦斯爆炸特性研究

Study on Gas Explosion Characteristics under the Action of Side Casing Explosion Venting

摘要: 为探究出一种新型高效的煤矿瓦斯爆炸应对方法，基于自主搭建的爆炸实验平台，爆炸管道侧壁设有套管泄爆腔体，通过设置不同泄爆口间距，研究甲烷爆炸的火焰形态、火焰传播速度及爆炸超压等爆炸特性。研究结果表明，套管泄爆作用下，爆炸火焰传播速度被显著控制。瓦斯爆炸最大火焰传播速度从无侧壁的27.13 m/s，降低到了18.81 m/s和14.52 m/s，最大衰减率为47.33%。同时，在侧壁套管泄爆作用下，无论是管道上游和管道下游的爆炸超压峰值相比于无侧壁泄爆都有所减小，其中最大衰减率可达35.5%。研究结果可为煤矿瓦斯爆炸的预防和控制提供理论基础，促进煤矿安全技术的发展和创新。

Abstract: In order to explore a new and efficient coal mine gas explosion response method, based on the explosion experiment platform built by ourselves, the side wall of the explosion pipeline is equipped with a sleeve blasting chamber. By setting different blasting outlet spacing, the explosion characteristics of methane explosions such as flame form, flame propagation speed, and explosion over-pressure are studied. The results show that the flame propagation speed is controlled significantly under the action of casing blasting. The maximum flame propagation velocity of gas explosion decreases from 27.13 m/s without a side wall to 18.81 m/s and 14.52 m/s, and the maximum attenuation rate is 47.33%. At the same time, under the action of sidewall casing blasting, the peak value of explosion overpressure of both upstream and downstream pipelines decreases compared with that without sidewall blasting, and the maximum attenuation rate can reach 35.5%. The research results can provide a theoretical basis for the prevention and control of coal mine gas explosions, and promote the development and innovation of coal mine safety technology.