%0 Journal Article
%T The experimental observation of the rock orthorhombic anisotropy<br>岩石正交各向异性的实验观测
%A WEI Jian-xin
%A DI Bang-rang
%A WANG Chun-yong
%A <br>魏建新
%J 地球物理学进展
%D 2008
%I 
%X Diverse factors can contribute to anisotropy of rock velocity.Furthermore,orthotropy occurs with the perpendicular distribution of such factors.Through S-wave polarization scanning mode of ultrasonic impulse testing,rock samples with three different properties are measured to evaluate the variation of S-wave velocity in three perpendicular coordinates.By analyzing S-wave splitting of three directions and polarization of the maximum or minimum speed S-wave amplitudes,we think that the velocity orthotropy and fracture orientation observed in the grain sandstones and crack marble samples can be estimated in terms of the polarization and velocity of S-wave.Also,perpendicularity characteristics on the two types of rocks can attribute to the bedding and structure of rocks(directional grains or crystallize).Lab scale ultrasonic testing can obtain the structural direction of orthotropy.
%K natural rock
%K orthotropy
%K fast and slow S-wave
%K crack
%K bedding<br>天然岩石
%K 正交各向异性
%K 快慢横波
%K 裂隙
%K 层理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=65CE641AB2DEAAF8B2D39ECB6B6B6C80&aid=A0E5A007997472AFB642F920207C71BA&yid=67289AFF6305E306&vid=EA389574707BDED3&iid=0B39A22176CE99FB&sid=5957D6E0A50D26B5&eid=406BF8ED3BCE1927&journal_id=1004-2903&journal_name=地球物理学进展&referenced_num=0&reference_num=19