摘要
为了研究节理对大断面巷道稳定性的影响,运用UDEC离散元软件创建不同倾角、不同间距节理切割下的大断面巷道模型,并以巷道位移和节理剪切滑移区为指标对巷道稳定性进行分析,研究结果表明:节理倾角从0°增至90°时,拱顶的沉降量先减小后增大,节理倾角增至90°时巷道发生破坏,节理剪切滑移区面积变大,且剪切滑移区从巷道两帮贯通至模型上边界;随着节理间距不断增大,拱顶的沉降量逐渐减小,节理剪切滑移区面积减小;节理分布越稀疏,节理对巷道稳定性的影响越小。
For the stability analysis of large section roadway joints,using UDEC discrete element software to create a different angle, large section roadway model under different spacing of joints,stability of the roadway is analysed with roadway displace- ment and joint shear zone as the index. The results show that when the joint angle increases from 0 degrees to 90 degrees, the settlement of vault will decrease first ,then increase and the road- way is destroyed. The joint area of the shear zone becomes large and the shear zone from two sides of roadway runs through to the upper boundary of model. With larger joint spacing, the settle- ment of vault decreases and the joint shear displacement area de- creases,joint distribution is sparse, the effect of joint on stability of roadway is small.
作者
付煜荣
许梦国
程爱平
刘鹏
FU Yu-rong;XU Meng-guo;et al(College of Resources and Environmental Engineering, Wuhan University of Seience and Technology, Wuhan Huhei 430081 ,China)
出处
《化工矿物与加工》
北大核心
2017年第11期26-29,共4页
Industrial Minerals & Processing
关键词
大断面
节理
巷道稳定性
UDEC
滑移区
large section
joint
roadway stability
UDEC
dis-placement zone
