Analysis on the controllable factor sensitivity and stability of roadway driving along goaf

For roadway driving along goaf,artificial controllable stability factors of surrounding rock are many.But it is not that all factors have positive effect to stability of roadway,and their sensitivities are also not similar.Aiming at the supporting characteristics of roadway driving along goaf,seven main factors were concluded,and orthogonal experiment table L18(37) was used to got eighteenth calculation schemes.Then,FLAC software was applied to calculate the eighteenth calculation schemes,deformation and force results of surrounding rock and supporting were got.At last,range values of controllable factor were got based on orthopole range theory,the concept of synthetic sensitivity and its calculation formula were put forward.There,sensitivity of factors also are analyzed.The whole analysis process including research means of orthogonal design,range theory,numerical analysis and statistical regression.These results provide some application research foundation for the supporting design of roadway driving along goaf.