Applicable Conditions of Room-and-Pillar Mining Goaf Treatment Methods under a Traffic Load

The disturbance depth of traffic load has a direct impact on the stability room-and-pillar mining goaf. To quantitatively calculate relationship between and influencing factors, 49 groups horizontal combinations different parameters are designed in this study, based orthogonal experimental design method. Midas GTS is used to simulate obtain corresponding data. A multivariate linear regression analysis conducted, formula for calculating established. According depth, goaf roof, coal pillar, base plate under conditions, judgment flow treatment method conditions established, it applied reconstruction expansion project Jixi section Dan-A national highway. results show that geogrid can be purposes when 1.5 times lower than goaf, or greater but stable. Additionally, grouting needed other cases. study provide scientific basis selection methods goafs underlying highways future. great significance field engineering safety measures concerning highway goafs.