高应力软岩巷道全断面锚注支护数值模拟分析

Numerical Simulation Analysis of Aoft Rock Roadway Whole Section Bolting and Grouting under High Stress

采用RFPA2D数值模拟方法,分析巷道在无支护、锚网索+钢棚支护和全断面锚注支护3种形式下巷道围岩的变形破坏和裂隙演化过程。对RFPA2D数值模拟过程研究分析表明,采用全断面锚注支护时,在较高应力作用下巷道围岩仍能保持较好的完整性,基本无明显破坏现象,对软岩巷道稳定性的维护具有显著意义。

Using the RFPA2 Dnumerical method, analysis of roadway in the absence of deformation and fracture of supporting of roadway surrounding rock, bolt mesh cable ＋ steel shed support and whole section bolting support three types of evolution. The RFPA2 D numerical simulation analysis shows, the whole section bolting, roadway surrounding rock under the action of force should be kept better integrity at higher,no significant damage phenomenon,has the remarkable significance to maintain the stability of soft rock roadway.