In order to study the influence of the stability of the surrounding rock of intersecting crack tunnels,uniaxial compression tests and numerical simulations were conducted on model specimens containing tunnel and cracks.The effects of the inclined angle of the main crack,the distance between the crack end and the tunnel wall,the length of the crack,and the angle between the primary and secondary cracks on the compressive strength of the model were studied.The research results indicate that when other parameters remain unchanged,the compressive strength of the model shows a pattern of first decreasing and then increasing as the inclined angle of the main crack increases from 0°to 180°.When the inclined angle of the main crack is 90 °,the compressive strength of the model is the smallest.The distance between the crack end and the tunnel wall has an irregular effect on the compressive strength of the model.When other parameters are the same,the longer the crack length,the smaller the compressive strength of the model.The angle between primary and secondary cracks has a significant impact on the compressive strength of the model.
关键词
交叉裂隙/隧道/围岩稳定/数值模拟
Key words
intersecting fissure/tunnel/stability of surrounding rock/numerical simulation
维普
万方数据