Since water seepage comes out of Kunlun Mountain tunnel at a valley

understanding the ground temperature at the valley is one of the most important things to treat the disease. The ground temperature is studied; it is traced back before tunneling by numerical simulation on the basis of geological observation information from March to May

2004. So it is educed as follows: (1) there is an unfrozen channel underground the valley; (2) the ground temperature around the tunnel is affected by tunneling; (3) the maximum frozen depth is about 10 m; and the maximum thawing depth is not over 4 m.