Numerical simulation on deformation character of surrounding rock masses of Changjiashan tunnel through the gob of coalmine

Based on the construction project of the Changjiashan tunnel of the freeway,the variety rule of surrounding rock masses of the tunnel through the gob of coalmine wasstudied by using of finite element methed(FEM).The status of the stress and strain,thevariety of the plastic area were simulated in the whole rock mass before and after thetunnel was excavated.The characters of stress and deformation of surrounding rockmasses were analyzed when the tunnel was built.It concluded from the numerical simula-tion that the influence on the tunneling is great when the tunnel passing through the gob ofcoalmine is excavated,and the relative measures should be taken.

常家山隧道的地质病害及防治对策研究

隧道施工中的地质灾害问题常常是影响隧道施工的关键问题,通过对常家山隧道综合勘察资料的分析,详述了隧道区的工程地质特征及施工中遇见的地质灾害。该区地质条件复杂,主要的地质病害包括采空区、突水涌水、有害气体、出口端滑坡,由于区内存在的各种地质灾害会影响到隧道围岩的稳定和安全施工,因此必须对这些地质灾害进行治理,针对灾害特征,提出了相应的防治措施。

韩信岭路段隧道煤系地层塌方处治的技术措施

常家山隧道地质变化复杂,洞身穿过煤系地层及采空区容易出现塌方,介绍了RK88+665处塌方的处治措施及施工中应注意的问题。