深部巷道松动圈的计算与数值模拟

Calculation and Numerical Simulation of Loose Ring of Deep Roadway

地下巷道在开挖过程中,由于采动作用对围岩的扰动,在巷道周围形成了松动圈。松动圈的拓展范围对爆破设计和支护设计都有重要的影响。运用莫尔库伦准则和霍克布朗准则对松动圈范围进行理论推导并与数值模拟相结合,研究某深部巷道松动圈的范围,结果表明理论计算和数值模拟运算的松动圈范围有较好的一致性。

Under the excavation process of the underground roadway, due to the disturbance of the surrounding rock, the loose circle is formed around the roadway. The expansion range of the loose circle has an important influence on the design of the blasting and the design of the support. In this Paper, the range of loosening circle is deduced by using the Mohr-Coulomb criterion and the Hawke Brown criterion, and the range of loosening of a deep roadway is studied by combining with the numerical simulation. The results show that the range of loosening of theoretical calculation and numerical simulation is Good consistency.