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During the period from the end of 1950s to the early 1960s, a series of engineering disasters of rock mass occurred one after another, for example, in December 1959, the foundation of the Malpasset concrete arch dam in France failed and resulted in a flood and about 450 people were killed ; in October 1963, a landslide of upstream of the reservoir of Vajont dam in Italy generated wave of 100 meters overtopped the dam and killed about 2500 people of the downstream of the dam; in 1960, a coal mine in South Mriea collapsed with the loss of 432 lives; in our country, several mines, such as Stannary Mining Bureau, Pangushan tungsten mine, Dajishan tungsten mine were mined in open stopping method, generated early or late many dilapidations of large-scale rock mass. These disasters aroused the galactic attention of people of rock engineering world and they joined in the study of rock mass mechanics, making rock mass mechanics effectively developed, and formed an engineering subject with sp
Abby has lived in the same house for as long as she can remember. But now her parents have decided that they need to move...and their house is on the market before the kids have even digested the news! Abby feels safe and secure in her old neighborhood, where all her friends are nearby. She doesn't care that she'll soon have her own bathroom and a pool in her backyard. She doesn't even care that she'll get to stay in the same school. Abby doesn't want to move! Whatever happened to the Hayeses making decisions together? And why do they have to move so close to Brianna?
