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            <title xml:lang="en">Damping measurements from microseismic signals to infer rock mass damaging</title>
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                <forename type="first">Danilo</forename>
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            <idno type="halRefHtml">&lt;i&gt;Italian Journal of Engineering Geology and Environment&lt;/i&gt;, 2019, 1, pp.25-28. &lt;a target="_blank" href="https://dx.doi.org/10.4408/IJEGE.2019-01.S-04"&gt;&amp;#x27E8;10.4408/IJEGE.2019-01.S-04&amp;#x27E9;&lt;/a&gt;</idno>
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                <title xml:lang="en">Damping measurements from microseismic signals to infer rock mass damaging</title>
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              <p>Geophysical monitoring performed on unstable portions of rock  masses  can  help  in  defining  a  variation  in  its  stability conditions,  resulting  as  a  useful  indicator  for  landslide  risk reduction. In particular, understanding geophysical markers of rock mass damaging, intended as the processes that lead to the formation  or  to  the  growth  of fractures,  could  improve  risk mitigation strategies. This work illustrates a methodology usedto process a microseismic dataset acquired on a 12 m3 rock block prone to failure, located in the Acuto quarry test site, Central Italy. The microseismic monitoring campaign lasted 3 months and  was  conducted  by  deploying  6  one-component accelerometers partially on the rock block and partly on the rock mass wall. The acquisition was set in continuous mode and with a sampling frequency of 2400 Hz, allowing to collect hundreds of microseismic events. The damping coefficient of each event has been evaluated for some frequencies of interest, then the values have been averaged and compared through the whole period analysed in order to derive possible variations in the vibrational behavior of the monitored rock block. Despite no relevant  changes  have  been  noted,  this  technique  could  be helpful for analysing bigger datasets or to study different sites in which the external stresses are more intense and recurrent.</p>
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