大断面Y型拱形巷道交叉点稳定性数值分析  

Numerical Simulation Analysis of the Stability of Large Cross- section Y- arched Roadway Crossing Point

作　　者：郝长胜[1] 杨永杰[1] 刘瑞[1] 高国强[1] 尚建伟[1] 

机构地区：[1]内蒙古科技大学,内蒙古包头014010

出　　处：《煤矿安全》2014年第3期179-182,185,共5页Safety in Coal Mines

摘　　要：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。Considering the issues of surrounding rock stability control of Y - shaped crossing point, the article uses FLAC3D software S - B modeling method to carry out numerical simulation analysis of influence factors including different crossing angle, buried depth, rock strength, coefficient of lateral pressure and excavation sequence. The results show that the influence of buried depth and intensity of surrounding rock, excavation sequence has more significant impact on the cross - point compared with the coefficient of lateral pres- sure and crossing point angle. The influence of buried depth and rock strength on the stability of crossing point exists in an inflection point. When the parameter is greater than the inflection point, the roadway will has a greater damage. The influence of coefficient of lateral pressure on crossing point is mainly reflected in the plastic zone size of the crossing point, although there is no law, fluctuation range is little.

关 键 词：巷道交叉点 稳定性 数值分析 围岩强度 侧压系数 

分 类 号：TD322.4[矿业工程—矿井建设]