端面顶板冒落高度影响因素多元线性回归分析

Multiple linear regression analysis on affecting factors of tip- to- face roof caving height

基于数理统计的方法,对影响端面顶板稳定性的多个因素进行了正交试验分析,将顶板冒落高度作为判断指标,得到了各因素的影响程度.影响程度从大到小依次为裂隙发育程度>风化岩体强度>推进速度>端面距=支架初撑力>采高.然后,假设端面顶板冒落高度与各影响因素线性相关,采用统计分析软件SPSS对各因素进行多元线性回归分析,结果表明,各因素与顶板冒落高度的线性关系成立,且得到了各因素的回归方程.最后,根据分析结果提出了预防端面顶板冒落的具体措施,为控制端面顶板提供依据.

Based on mathematical statistics method,the stability affecting factors of the tip- to- face roof were analyzed by orthogonal experiment,the roof caving height as a judgment index,the influence degree of each factor was obtained. Descending order of impact as following： crack growth degree,weathered rock strength,advance speed,tip- to- face distance,the support resistance and mining height. Then,assuming that the tip-to- face roof caving height correlated with each factor linearly,by using SPSS statistical analysis software for each factor multiple linear regression analysis,result showed that the factors and caving height has a linear relationship,and get regression equation of each factor. Finally,according to the results of the analysis proposed specific measures for preventing the tip- to- face roof caving.