A numerical study on the ground amplifications in areas above abandoned room and pillar mines and old longwall mines

摘要

In this article, the authors present the outcomes of their studies on the dynamic characteristics ofrnground and amplification of ground motions above abandoned mines and discuss their implications. In additionrnto the effects of some parameters associated with extraction, some topographic effects on ground motions inrnareas with abandoned mines are also investigated and results are presented. It will be clearly shown that groundrnamplifications may be quite large on the abandoned mines where extraction is carried out by room and pillarrntechnique or open-pit mines. The ground amplifications may be 3–5 times that at the base. Particularly thesernamplifications may be quite large particularly near steep cliffs.