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| 1 | 用深反射大炮对大巴山-秦岭结合部位的地壳下部和上地幔成像显示文摘根据近垂直反射原理对秦岭和大巴山结合部位的深地震反射测线上的5个大药量的反射大炮进行静校正、去噪、速度求取、CDP分选等处理获得沿深地震反射测线的大炮单次覆盖剖面.单次剖面和原始单炮数据结果初步显示:深地震反射测线最南端TWT 16 s处存在地幔反射,该地幔反射界面向北可以追踪到凤凰山下TWT 18.5 s.地幔反射在原始大炮数据表现为信噪比较高的连续震相.莫霍面反射在凤凰山南10km,TWT在16 s,从该处向南莫霍面震相难以识别,不能追踪;从该处向北,莫霍面反射可连续追踪,界面变化平缓、南深北浅,在测线最北端莫霍面反射TWT 14.2 s.初步认为测线最南端的地幔反射为扬子板块向北俯冲证据. | 李洪强 高锐 王海燕 李文辉 卢占武 侯贺晟 熊小松 | 2014 | 地球物理学进展2014,29,1: | 9 |
| 2 | Pilot studies on two dimensional wave propagation in rock masses显示文摘Pilot studies on two dimensional(2-D) wave propagation through single joint or multiple parallel joints were comprehensively conducted, using a suitable data processing method. The possible factors influencing the transmission ratio in 2-D wave propagation under certain circumstances in rock masses were studied. It is found that in the process of 2-D wave propagation, for any radial line, the amount, the stiffness and the spacing of the joints influence the transmission ratio; by contrast, the transmission ratio at any point is independent of the radial distance from the center of wave source. It is also found that the transmission ratio for every grid-point along a single circle can present the transmission ratio for every grid-point after a certain quantity of joints. For the special radian direction(normal to the joints), it is concluded that the transmission ratio is dominated by the normal stiffness; while the influence of shear stiffness is negligible. The radius of the tunnel or borehole for the source wave does not affect the transmission ratio in 2-D wave propagation. | 雷卫东 M.H.Ashraf 赵坚 | 2005 | 中国有色金属学会会刊:英文版2005,15,4: | 1 |
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