Analysis and control of roadway deformation in deep high ground stress inclined rock seam

Aiming at the difficult problem of controlling large deformation of surrounding rock in deep inclined strata roadway, the characteristics and causes of deformation and failure of surrounding rock in deep inclined strata roadway are analyzed by field investigation and numerical simulation, taking the second horizontal track roadway on the north wing of Jiulong mine as the engineering background.The results show that the main causes of roadway deformation and instability are shearing slip failure and bending deformation of inclined strata, soft and fractured surrounding rock, serious floor heave and poor pertinence of supporting structure.With the increase of dip angle of rock strata, the failure mode of surrounding rock of deep roadway changes gradually from interlayer sliding failure of inclined rock strata to interlayer sliding failure of rock mass separation and bending deformation near the arch shoulder of roadway.Based on the above research, the supporting technologies of high strength bolt and high prestressing cable, strengthening support at key parts of roadway deformation, controlling floor heave and erecting U-shaped steel, full-section shotcrete and grouting are put forward to strengthening the overall strength and bearing capacity of surrounding rock.Engineering practice shows that the effect of deformation control of surrounding rock of roadway is remarkable.