掲載雑誌（和）： 岩盤力学に関するシンポジウム講演論文集 Vol： 25巻 年： 1993年 頁： 266-270頁 著者（和）： 岸田　潔，　谷本　親伯，　松崎　聡，　小田原　雄一 タイトル（和）： 弾性波減衰ジオトモグラフイーの応用とき裂性状 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF THE SYMPOSIUM ON ROCK MECHANICS 著者（英）： Kiyoshi KISHIDA, Chikaosa TANIMOTO, Satoshi MATSUSAKI, Yuichi ODAWARA タイトル（英）： APPLICATION OF SEISMIC ATTENUATION GEOTOMOGRAPHY TO JOINTED ROCK 抄録（英）：
Prior to the construction of rock structure, we must know the orientation and characteristics of major discontinuities in an objective area. From many kinds of investigations at ground surface and in boreholes, we can get only one-dimensional information, but that is not enough. In order to get two or three-dimensional information on discontinuous rock, the authors have applied the newly developed seismic attenuation geotomography technique in addition to the conventional seismic geotomography, which provides only the distribution of velocities. Based on the past research of ours, when the magnitude of joint aperture is less than 0.2mm in width and confining pressure at joints is less than 2MPa, velocity change does not suggest the influence of existing joints. The change of amplitude of propagating wave , however, can reflect the effect of joint. Because of the clear reduction of running energy at joint, we can detect the location of joint and the degree of the so-called loosening zone behind the free face. Also, the authors have carried out the fundamental laboratory test with stacked rock specimens corresponding to actual rock mass. The focal point of this paper is that the boundary condition, which means the setup of measuring lines (shot and receive points), highly affects the accuracy of the interpretation through the geotomography. And we have carried out seismic exploration using a cross-hole configuration and analyzed to compare the result with borehole survey. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集