.... 1.2 Background Knowledge The dynamic response of unlined cylindrical cavities in a half-space to transverse SV waves has previously been investigated by many researchers. The stress-free boundary conditions at the free surface are among the most complicated boundary c­ onditions to be satisfied...

..., internal erosion develops between the limestone and coal-bearing gyttja contacts, and the weak upper cover composed of young ­sedimentary layers collapses into karstic cavities in the base rock due to the gravity. 1 INTRODUCTION It is recorded that numerous karst-related sinkholes formed on the edge...

...2019 Rock Dynamics Summit Aydan et al. (eds) © 2019 Taylor & Francis Group, London, ISBN 978-0-367-34783-3 An integrated system for the cavity-filling of an abandoned lignite mine beneath Kyowa Secondary School in Mitake, Japan against an anticipated mega-earthquake K.Sugiura & A.Sakamoto...

... caused by collapse of the tunnel due to the shaking of the Tokai and Tonankai earthquakes, which is expected to occur near future, the work on filling fluent earth materials to the underground cavity is proceeding. To clarify the distribution of lignite pits and to monitor the filling condition of fluent...

...2019 Rock Dynamics Summit Aydan et al. (eds) © 2019 Taylor & Francis Group, London, ISBN 978-0-367-34783-3 Nature and distribution of cavities within the Ma on Shan Marble at Area 90 Hong Kong A. Indelicato Atkins Ltd. ABSTRACT: Marble is not very common in Hong Kong, it accounts for only 3...