摘要
为了研究煤变质程度、不同粒径、含水率对煤体瓦斯放散特性的影响规律,选用WT-1瓦斯放散初速度测定仪对5个典型矿区的煤样进行测定,设计单因素试验分析各因素对瓦斯放散特性的影响规律。通过响应面法分析,并建立各因素交互作用的响应面回归模型,得到2种因素交互作用对瓦斯放散特性的影响规律。结果表明,煤的瓦斯放散初速度与镜质组反射率呈正相关关系,与粒径、含水率呈负相关关系,瓦斯放散初速度受3种因素影响的规律均呈幂函数关系。其中,变质程度对瓦斯放散初速度影响最为显著,粒径次之,含水率影响最小;煤体瓦斯放散特性不仅受上述3个因素的单一影响,受三因素交互影响的作用也很显著,其中变质程度与粒径交互作用最为显著,含水率与粒径交互次之,变质程度与含水率交互作用最弱。
In order to study the influence of coal metamorphism,different particle sizes,and moisture content on the gas emission characteristics of coal body,the WT-1 gas emission initial velocity tester was used to measure coal samples in five typical mining areas,and design a single factor experiment to analyze the influence law of each factor on the gas emission characteristics.Through the response surface method analysis,the response surface regression model of the interaction of various factors is established,and the influence law of the interaction of the two factors on the gas emission characteristics is obtained.The results show that the initial velocity of coal gas emission increases with the increase of vitrinite reflectivity,decreases with the increase of particle size and moisture content,and the law of the initial velocity of gas emission affected by three factors is a power function relationship.Among them,the degree of metamorphism has the most significant effect on the initial velocity of gas emission,followed by particle size and the least effect on moisture content;the gas emission characteristics of coal body are not only affected by the above three factors alone,but also by the interaction of the three factors.Among them,the interaction between the degree of metamorphism and particle size is the most significant,and the interaction between moisture content and particle size is the weakest.
作者
董春发
窦桂东
李可
徐传玉
张文
周雨璇
邓岱雨
DONG Chunfa;DOU Guidong;LI Ke;XU Chuanyu;ZHANG Wen;ZHOU Yuxuan;DENG Daiyu(Shaanxi Binchang Xiaozhuang Mining Co.,Ltd.,Xianyang 713500,China;School of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《陕西煤炭》
2022年第5期19-23,共5页
Shaanxi Coal
关键词
瓦斯放散初速度
煤变质程度
含水率
粒径
响应曲面
gas emission initial velocity
degree of coal metamorphism
moisture content
particle size
response surface
