Assertion: hydrate's property | /r/HasSubevent | excessive ground settlement
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text: For example, the depressurization process used for methane gas extraction significantly increases the effective stress state by the reduction in pore pressure and may change the mechanical properties of hydrate soils, which may lead to potential geomechanical hazards such as excessive ground settlement, submarine landslide or wellbore collapse, which have been considered theoretically by many researchers [e.g., Settari , 2002; Sultan et al. , 2004; Xu and Germanovich , 2006;