基坑排水形成地下水降落漏斗，诱发岩溶地面塌陷；
Drainage of the foundation pit formed the landing funnel of underground water which induce rocky surface collapse;
渗压效应致塌机制是多年持续采水区降落漏斗中心部位岩溶塌陷的主要力学机制。
And the seepage pressure mechanism is the primary mechanism of karst collapse in the center of cone of depression in continual pumping region.
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