8102高应力软岩巷道支护参数设计与应用

Design and Application of Support Parameters for 8102 High-stress Soft-rock Roadway

8102高应力软岩巷道拟使用锚网索喷+锚注联合支护方式,并设计了支护参数。本文采用FLAC3D模拟未支护、初次锚网索喷支护、二次锚注支护后巷道围岩变形及塑性区分布情况,分析可知,设计的支护参数可保证8102巷道围岩稳定性。现场围岩变形量监测结果表明,巷道围岩变形主要集中在前30 d内,二次锚注支护需在初次支护30 d后进行。

By FLAC3D simulation of the deformation and plastic zone distribution of the roadway surrounding rock in 8102 high-stress soft rock roadway in unsupported state and after the primary bolt-mesh-cable shotcreting and secondary bolt-grouting support,the designed support parameters is proved to ensure the stability of the 8102 roadway surrounding rock,and the on-site monitoring results show that the surrounding rock deformation of the roadway is mainly concentrated in the first 30 days,and the secondary bolt grouting support needs to be carried out 30 days after the primary support.