Surrounding Rock Pressure of Deep Roadway and Influences on Advance Support

Abstract

To provide the mechanical data reference for the structural design and the control of the advance support brackets, the dynamic coupling model of the surrounding rock with advance support brackets was established by FLAC3D, the pressure variation law of surrounding rock and the influence on the support bracket was investigated in the deep coal roadway under two support conditions. The studied results show that under the joint support condition of advance support bracket with anchor bolt, the stress at the top of the bracket should be greater than 20 MPa, the maximum stress of 163 MPa at the vertical pillar, and the stress at the horizontal direction should be greater than 52.9 MPa. The results provide the basis for the design of advance support brackets for deep fully mechanized coal roadway.