Rigid-flexible Chimera Bolting-grouting Supporting Technology in Deep Steeply Inclined Seam Roadway

For the characteristics of high stress, high expansion pressure and easy to shock bumps when sublevel crosscut of Changgouyu Coal Mine passes through the soft and steeply inclined coal seam, traditional concrete support or anchor bolt concrete with metal stents can not completely solve the problem of stability of surrounding rock, which is difficult to eradicate the problem of deformation and destruction of soft coal under pressure. Therefore, we use the technology of rigid-flexible chimera bolting-grouting support for deep level rock tunnel through coal seam in reasonable support, which is numerically simulated. Combined with the practice, the results show that the technology of rigid-flexible chimera bolting-grouting support has effectively controlled the change of surrounding rock, and the rock has good stability.