Abstract:
Aiming at the difficult support features of the oil shale mining roadway,combined with the analysis of physical and chemical properties of oil shale,it is pointed out that bedding structure of surrounding rock and weathering is the root cause of roadway deformation instability,and bolting parameters are determined by numerical simulation.On this basis,a rock control technology of "high-strength prestressing,moderate yield,retaining the table by guniting" is proposed,and the surrounding rock stability control is achieved by yielding anchor bolt of high-strength prestressed and anchor cable matching with a large area butterfly pallet.Comparative analysis of supporting effect of the technology applied in the roadway depth of 800~850 m with the previous,it is showed that the proposed rock control technology can effectively control deformation and failure of the roadway,which ensured the stability of the roadway.