煤质指标与煤尘爆炸性关联实验研究

发布时间：2018-01-07 02:22

本文关键词：煤质指标与煤尘爆炸性关联实验研究　出处：《辽宁工程技术大学》2015年硕士论文　论文类型：学位论文

【摘要】：为分析煤质指标对煤尘爆炸性的影响作用,并利用煤质指标数据对煤尘爆炸火焰长度进行预测,本文按照国家标准使用相关仪器进行煤质分析实验与煤尘爆炸性鉴定实验。测得十一种煤样的八项煤质分析指标及其煤尘爆炸火焰长度。对煤质指标与煤尘爆炸火焰长度数据进行相关性分析,发现煤质指标之间的相关系数绝对值最高达0.99,属于高度相关,说明存在信息重叠。煤质指标与煤尘爆炸火焰长度之间相关系数的绝对值最高达0.7,属于中度相关,说明煤质指标对煤尘爆炸性存在一定影响作用。对煤质指标数据进行主成分分析以消除其数据的高度相关性,提取出的三大主成分被分别命名为“挥发分因子”,“灰分和固定碳因子”,“水分和着火点因子”,首次从统计分析角度证明,在所选取的煤质指标中,挥发分对煤尘爆炸性影响作用最大,由挥发分前系数为正数说明挥发分越大,爆炸危险性越大,这与实际情况吻合。利用煤质指标对煤尘爆炸火焰长度进行回归建模,实例分析结果为,有爆炸性煤尘火焰长度预测误差达8.89%,对存在误差原因进行分析,无爆炸性煤尘预测火焰长度值为负数。两个预测结果表明,该预测模型作为基于煤质分析的煤尘爆炸性预测初探并不能十分准确预测火焰长度。本文的煤质指标对煤尘爆炸火焰长度影响作用及回归预测研究对于煤矿现场及用煤企业的煤尘爆炸危险性评估具有一定指导和借鉴意义,利于及时采取防爆措施,避免爆炸事故发生。
[Abstract]:In order to analyze the influence of coal quality index on coal dust explosion, the flame length of coal dust explosion was predicted by coal quality index data. In this paper, according to the national standard, the coal quality analysis experiment and the coal dust explosive identification experiment are carried out by using the relevant instruments. Eight coal quality analysis indexes of 11 kinds of coal samples and the flame length of the coal dust explosion are obtained, and the coal quality index and the coal dust explosion are obtained. The correlation of flame length data was analyzed. It is found that the absolute value of correlation coefficient between coal quality index and coal dust explosion flame is up to 0.99, which is highly correlated, indicating that there is overlap of information, and the absolute value of correlation coefficient between coal quality index and explosion flame length of coal dust is up to 0.7. It belongs to moderate correlation, which indicates that coal quality index has certain influence on coal dust explosion. The principal component analysis of coal quality index data is carried out to eliminate the high correlation of coal quality index data. The three principal components were named volatile factor, ash factor and fixed carbon factor, water content and ignition point factor respectively, which was proved by statistical analysis for the first time in the selected coal quality index. Volatile matter has the greatest effect on coal dust explosion. The higher the volatile content is, the greater the explosion risk is. This is consistent with the actual situation. Using the coal quality index to model the length of coal dust explosion flame, the result of case analysis is that the prediction error of the length of explosive coal dust flame is up to 8.89%. The cause of error is analyzed, and the predicted flame length of non-explosive coal dust is negative. Two prediction results show that. The prediction model can not predict the flame length accurately as the explosive prediction of coal dust based on coal quality analysis. The effect of coal quality index on the flame length of coal dust explosion and the regression prediction study on coal mine site. And the coal dust explosion risk assessment of coal enterprises has certain guidance and reference significance. It is helpful to take anti-explosion measures in time to avoid explosion accidents.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD714.5

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