摘要
为研究初始瓦斯压力、煤层孔隙率、钻孔直径、抽采负压及初始渗透率五个因素对钻孔瓦斯有效抽采半径的影响,利用COMSOL数值模拟,结合正交试验及极差分析探究各因素影响情况,并运用SPSS软件线性回归分析获得方程。研究结果表明:初始渗透率对瓦斯有效抽采半径影响最大;极差分析影响程度依次为初始渗透率、钻孔直径、抽采负压、孔隙率、初始瓦斯压力,其中有效抽采半径最大时因素水平最优组合为初始瓦斯压力为1.2 MPa、孔隙率为0.08、钻孔直径为94 mm、抽采负压为20 kPa及初始渗透率为1×10^(-15)m^(2)时;多元线性回归方程中决定系数R^(2)=90.6%,拟合程度良好。
In order to study the influence of five factors,namely,initial gas pressure,coal seam porosity,drilling diameter,negative pressure and initial permeability,on the effective radius of gas extraction under the drilling,numerical simulation was constructed by COMSOL,and orthogonal experiments and analysis of polarity were used to explore the influence of the factors,and the equations were obtained by using linear regression analysis of the SPSS software.The results show that the Initial permeability has the greatest influence on the effective radius of gas extraction;the degree of influence of the extreme variance analysis is,in order of magnitude,the initial permeability,drilling diameter,the negative extraction pressure,the porosity,the initial gas pressure;the optimal combination of factor levels with the largest effective extraction radius is when the initial gas pressure is 1.2 MPa,the porosity is 0.08,the drilling diameter is 94 mm,the negative extraction pressure is 20 kPa and the initial permeability is 1×10^(-15)m^(2);the coefficient of determination R^(2)=90.6%in the multiple linear regression equation is a good fit.
出处
《中国矿山工程》
2024年第6期49-55,共7页
China Mine Engineering
基金
中央高校基本科研业务费专项资金(2023ZKPYAQ04)
安徽省爆破器材与技术工程实验室(AHBP 2022A-03)。
关键词
瓦斯抽采
有效抽采半径
正交试验
极差分析
多元线性回归
gas drainage
effective extraction radius
orthogonal experiment
extreme variance analysis
multiple linear regression
