软弱围岩并行隧道合理间距与超前地质预报研究  

Study on Reasonable Spacing of Parallel Tunnels Under Soft Surrounding Rock Condition and Advanced Geological Prediction

作　　者：孙金海[1,2] 明建[1,2] SUN Jinhai;MING Jian(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of High-Efficient Mining and Safety of Metal Mines,Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《矿业研究与开发》2022年第8期72-77,共6页Mining Research and Development

基　　金：中央高校基本科研业务费项目(FRF-OT-16-015SY)。

摘　　要：针对隧道间距和不良地质体对双孔并行隧道稳定性的影响,对软弱围岩条件下并行隧道的合理间距与超前地质预报效果进行了研究。以岩石力学理论为指导,对不同隧道间距工况下的双孔并行马蹄形隧道的开挖过程进行数值模拟,获得了围岩及中间岩柱的应力分布规律。试验结果表明:隧道间距大小对中间岩柱受力状态影响显著;Ⅴ级围岩条件下,隧道间距应大于1.5倍洞半径;地质雷达图像能够有效反映出掌子面前方围岩中的不良地质体和隧道的衬砌情况。In view of the influence of tunnel spacing and unfavorable geological body on the stability of two-hole parallel tunnels,the reasonable spacing of parallel tunnels under soft surrounding rock condition and the effect of advanced geological prediction were studied.Under the guidance of rock mechanics theory,the excavation process of two-hole parallel horseshoe tunnels with different tunnel spacing was numerically simulated,and the stress distribution laws of surrounding rocks and middle rock pillars were obtained.The test results are concluded as follows.The tunnel spacing has a significant effect on the stress state of the middle rock pillars.Under the condition of classⅤsurrounding rock,the tunnel spacing shall be greater than 1.5 times of the tunnel radius.The geological radar image can effectively reflect the unfavorable geological body in the surrounding rock in front of the tunnel,as well as the situation of the tunnel lining.

关 键 词：并行隧道 软弱围岩 隧道间距 地质预报 非接触检测 

分 类 号：TD322[矿业工程—矿井建设] U451[建筑科学—桥梁与隧道工程]