The prisoners used the tunnel to escape from jail.

囚犯们利用这条地道越狱逃跑了。

《新英汉大辞典》

Fresh from his honeymoon, Hazem Gamal heard his wedding ring drop as he fled into a toll booth by the Brooklyn Battery Tunnel to escape the dust cloud from the crumbling south tower.

Hazem Gamal刚度完蜜月，还处在新婚的甜蜜中。当时，世贸大厦南楼逐渐坍塌，在周围形成了如乌云般的尘土，为了逃避，他躲进了布鲁克林隧道的街边收费亭，这时他听到了婚戒掉落的声响。

youdao

This tunnel was dug, no doubt, with an intention of escape?

这条地道，无疑的，是为了想逃走才挖的罗？

youdao

This showed that the propensity to build a long entrance tunnel and build an escape tunnel are genetically separate.

BBC: Mouse burrowing 'in their genes'

One of the patients may have been digging an escape tunnel, the source added.

BBC: Blaze kills 38 at psychiatric hospital near Moscow

Mr. Hu said Mr. Chen had been working on a way to escape since his confinement began in 2010 and that he had tried in 2011 to dig a tunnel into his neighbor's compound, but that it had been discovered by guards.

WSJ: Chinese Activist Flees House Arrest