Study on Deformation of Tunnel with Underlying Coal Mining
Coat mining can cause the strata distortion and surface subsidence. With infrastructure construction scale in our country enlargement, the case of approaching excavation caused by coal mining is increasing and more complicated. The calculation method of current regulations is too simple and dont conform to the present coal mining technology, so it will cause serious waste of resources. By using numerical simulation, this paper regards the influence of coal mining on the above tunnel as approaching excavation problem and studies the tunnel deformation law with three different coal mining mode. Based on the analysis and calculation, this paper proposes measures to ensure that the coal seam mining and tunnels safety. The result indicates the more smaller the dip angle of coal block the more larger the displacement and the deformation range of tunnel. The most effective method for decrease deformation is the backfill method. If the conditions are permitted, backfill method is the preferred method and longwall caving method is last.
Coal mining Tunnels deformation coal column Failure criterion caving method
Zhi Gang Yan
Shijiazhuang Institute of Railway Technology, Shijiazhuang 050000, China
国际会议
上海
英文
1295-1298
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）