Research on destabilisation mechanism and control technology of surrounding rock in deep high stress soft rock roadway
In order to investigate the technical problems of deep soft rock roadway supporting,taking the track roadway in the fifth min-ing area of Longbo Mine of Huozhou Coal and Power Linfen Hongda Company as the engineering background,the destabilisation mecha-nism of deep soft rock roadway was studied and analyzed through on-site investigation,X-ray diffraction,electron microscope scanning and numerical simulation,and it was concluded that the high geostress,the low strength of the coal and rock mass,and the irrational supporting method were the main influencing factors that led to deformation and destruction of the surrounding rock of the roadway.Ac-cordingly,the joint supporting scheme of"anchor cable+metal mesh+sprayed concrete+steel pipe concrete support"was proposed.Industrial practice shows that,after adopting the joint supporting scheme,the maximum values of the roof and floor approach and the convergence of two gangs are 142 and 123 mm,which are about 67％and 79％less than that of the original supporting scheme,and the effect of deformation control of the surrounding rock is obvious.The results of this study can provide an important reference for the con-trol of surrounding rock stability of deep soft rock roadway.
high stresssoft rock roadwaynumerical modeldeformation damagesteel pipe concrete support
万方数据
维普
