用改进的科沃德爆炸图确定矿井瓦斯的爆炸性

摘要

为了改良用于测定矿井瓦斯爆炸性的科沃德爆炸图，并提高其精度，从分析矿井中气体组成入手，剖析影响可燃气体爆炸极限的种种因素，对爆炸极限进行修正。研究工作取得的进展有：扩充了原来的科沃德爆炸图；纠正了可燃极限；重新定义了每一种可燃气体的鼻限点；开发了一个方程用于测算单种可燃气体所需的过量惰性气体，并运用交叉验证的方法来检验结果。结果表明，改进的科沃德爆炸性图更精准、可靠，可以应用于生产实践。%To modify the Coward diagram which is used to determine the explosibility of mine gas and improve its accuracy,the study began with the analysis of mine gas composition and analyzed various influencing factors on flammable gas explosion limit, meanwhile corrected the explosion limit.Improvements that conducted in this research including:expanding the original Coward diagram;correcting the original flammable limits;redefining the nose limit for each combustible gas;and developing an equation to predict the excessive amount of inert gas needed for each combustible gas,then cross-verification method is used to test the re-sults.The results show that the modified Coward diagram method has higher accuracy and reliability and could be applied in prac-tice.