瓦斯、煤尘共存条件下爆炸极限变化规律实验研究

发布时间：2018-01-22 01:37

本文关键词： 瓦斯爆炸煤尘爆炸共存条件爆炸极限　出处：《中国矿业》2016年04期 　论文类型：期刊论文

【摘要】：采用20L近球形爆炸特性测试系统对瓦斯、煤尘共存条件下爆炸极限变化规律进行了实验研究。研究发现:在本实验条件下,煤尘的爆炸下限浓度随瓦斯浓度的增加而逐渐下降,纯煤尘时的爆炸下限浓度是28.4g/m3,当加入1.70%浓度瓦斯时,煤尘爆炸下限浓度下降到7.8g/m3,且煤尘爆炸下限与瓦斯浓度呈指数函数关系变化;瓦斯的爆炸极限随煤尘浓度的增加发生改变,且与煤尘浓度呈不同的指数函数关系;纯瓦斯的爆炸上限为15.8%,而加入100g/m3的煤尘后瓦斯的爆炸上限下降到了12.8%;瓦斯的爆炸下限随煤尘浓度的增加逐渐下降,纯瓦斯的爆炸下限为5.10%,而加入100g/m3的煤尘后瓦斯的爆炸下限下降到了3.1%。研究结果为煤矿井下瓦斯煤尘爆炸事故的防治提供理论依据。
[Abstract]:A 20L near-spherical explosion test system was used to study the rule of explosion limit variation under the coexistence of gas and coal dust. The lower limit concentration of coal dust decreases gradually with the increase of gas concentration. The lower explosion limit concentration of pure coal dust is 28.4g / m ~ 3, when 1.70% concentration of gas is added. The lower limit of coal dust explosion decreases to 7.8 g / m ~ 3, and the relation between the lower limit of coal dust explosion and gas concentration is exponential function. The explosion limit of gas varies with the increase of coal dust concentration and has a different exponential function relationship with coal dust concentration. The explosion upper limit of pure gas is 15.8g / m ~ 3, but the upper limit of gas explosion drops to 12.8g / m ~ 3 after adding 100 g / m ~ 3 coal dust. The explosion lower limit of gas decreases gradually with the increase of coal dust concentration, and the explosion lower limit of pure gas is 5.10%. After adding 100 g / m ~ 3 of coal dust, the lower limit of gas explosion dropped to 3.1. The results provide theoretical basis for the prevention and control of gas and coal dust explosion accident in coal mine.
【作者单位】：中煤科工集团重庆研究院有限公司;
【基金】：国家自然科学基金项目资助(编号:51374235,51274238) 中煤科工集团重庆研究院有限公司自立科研开发项目资助(编号:2013YBXM14)
【分类号】：TD714.5;TD712.7
【正文快照】： 瓦斯爆炸事故造成的破坏巨大,并且可能引起煤矿井下沉积煤尘参与爆炸,造成更大的人员伤亡和财产损失。瓦斯、煤尘共存条件下的反应过程非常复杂,二者单独反应,同时又相互影响[1-3]。爆炸极限是爆炸的重要特征参数,处于极限浓度范围内的瓦斯、煤尘才能够发生爆炸。国内外学者通

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