The measurements of ground stresses by using the hydraulic cracking method within the deep boreholes were proceeded at the Qinling extra long tunnel district.

秦岭特长隧道地区采用水压致裂法进行了深钻孔的应力测量。

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Coal mining-induced cliff rock cracking and collapse enhanced hydraulic connection between the landslide and the cliff, indirectly increased the precipitation area of the landslide.

采煤活动诱发的危岩体开裂和崩塌，加强了滑坡体与危岩体的水力联系，间接扩大了滑坡体的受雨面积。

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Hydraulic pier structures are widely used in the construction of sluices, culverts and earth-retaining walls. Cracking of hydraulic piers becomes very common in hydraulic project construction.

水工墩墙结构广泛分布于水闸、涵洞、挡土墙等水利工程中，水工墩墙开裂已成为水利工程建设的一个通病。

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