论文部分内容阅读
针对Y型交叉点围岩稳定性控制方面的问题,运用FLAC3D软件,采用S-B建模方法对不同的交叉角度、埋深、围岩强度、侧压系数以及开挖顺序等影响因素进行数值模拟分析。结果表明,与交叉点角度和侧压系数相比,埋深、围岩强度、开挖顺序对Y型交叉点的影响更为显著。且埋深和围岩强度对交叉点稳定性的影响均存在1个拐点,当参数大于拐点时均会产生较大的破坏。而侧压系数对交叉点的影响主要体现在对交叉点塑性区域大小的影响,虽无规律,但是波动范围不大。
Aiming at the problem of surrounding rock stability control at Y intersection, the influence of different crossing angles, burial depth, surrounding rock strength, lateral pressure coefficient and excavation sequence were simulated by using FLAC3D software and SB modeling method . The results show that the influence of buried depth, surrounding rock strength and excavation sequence on Y-junction is more significant than that of cross-point angle and lateral pressure coefficient. The influence of depth and strength of surrounding rock on the stability of the crossing point has one inflection point. When the parameter is greater than the inflection point, it will cause greater damage. The influence of lateral pressure coefficient on the intersection is mainly reflected in the impact on the size of the intersection plastic zone. Although it has no regularity, the fluctuation range is not large.