研究目的：通过对克什克腾越岭隧道区地层多样，构造复杂的区域地质特征的分析，重点介绍了水压致裂法在地应力测试中的应用。同时，结合测试结果详细阐述了隧道区地应力的综合特点和可能发生的区域地质问题。
研究结论：在克什克腾旗隧道区实际钻孔的基础上，通过应用水压致裂法地应力测试技术，对隧道区地应力大小及存在状态进行了综合分析，得出了隧道区地应力变化规律: (1) 最大水平主应力值大于最小水平主应力和垂直应力，以水平应力作用为主。(2) 实测最大、最小水平主应力随钻孔深度的增加而逐渐增大，同时，最大水平主应力方向以 NEE～SWW 方向挤压为主。(3) 由于隧道区地应力状态分布均匀，实测地应力值不高，隧道区产生大的岩爆可能性不大。
Research purposes:The geologic strata in the area of Keshiketeng Mountain Tunnel is diverse with complicated geological structure． Based on the analysis of the geological characteristics of this area，in this paper，the introduction is given to application of hydraulic fracturing technology in testing the ground stress and combined the test results the introduction is also given to the comprehensive characteristics of the ground stress of this area and the geological problems that probably happen．
Research conclusions: Based on the drilling in the area of Keshiketeng Tunnel，the following points are concluded from the comprehensive analysis of the level and state of the ground stress in this area by using hydraulic fracturing technology area: (1) The maximum value of the level main stress should be bigger than the minimum level main stress and the vertical stress，and the level stress should be taken as the dominant factor．(2) The tested maximum and minimum level main stress should increase with the increase of the drilling depth and the NEE － SWW direction of squeezing should be taken as the dominant direction of the maximum level main stress．(3) As the ground stress of this area is distributed evenly，the measured stress is not high，so there is no possibility of happening rock outburst．
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