The entrance area of Yunyang Mountain Tunnel on Hengyang-Yanling Highway was widely distributed with mild clay, and it has poorrock stability and almost with no self-stabilizing capacity.
衡炎高速公路云阳山隧道进口端亚粘土分布广泛，围岩稳定性差，基本无自稳能力。
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"We know we live on a rock, but the poor people of Ascension live on a cinder," the residents of St Helena had joked before his departure.
Xuehu coal main and subsidiary well have deep shaft, thick surface soil and strong disability, poor pourability in the hydrated grope rock and complex geology condition.