| The Q value variations in the preparing pro－cess of rock rupture |
| |
| 引用本文： | 王彬,许昭永,赵晋明,胡毅力.The Q value variations in the preparing pro－cess of rock rupture[J].地震学报(英文版),1996(4). |
| |
| 作者姓名： | 王彬 许昭永 赵晋明 胡毅力 |
| |
| 作者单位： | BIN WANG 1)，ZHAO YONG XU 1)，JIN MING ZHAO 1) YI LI HU 2) 1) Seismological Bureau of Yunnan Province，Kunming 650041，China 2) Department of Geosciences，Yunnan University，Kunming 650091，China |
| |
| 摘 要： | ＴｈｅＱｖａｌｕｅｖａｒｉａｔｉｏｎｓｉｎｔｈｅｐｒｅｐａｒｉｎｇｐｒｏ┐ｃｅｓｏｆｒｏｃｋｒｕｐｔｕｒｅＢＩＮＷＡＮＧ１）（王彬），ＺＨＡＯ－ＹＯＮＧＸＵ１）（许昭永），ＪＩＮ－ＭＩＮＧＺＨＡＯ１）（赵晋明）ＹＩ－ＬＩＨＵ２）（胡毅力）１）Ｓｅｉ...
|
The Q value variations in the preparing process of rock rupture |
| |
| BIN WANG ,ZHAO YONG XU ,JIN MING ZHAO YI LI HU Seismological Bureau of Yunnan Province,Kunming ,China.The Q value variations in the preparing process of rock rupture[J].Acta Seismologica Sinica(English Edition),1996(4). |
| |
| Authors: | BIN WANG ZHAO YONG XU JIN MING ZHAO YI LI HU Seismological Bureau of Yunnan Province Kunming China |
| |
| Institution: | BIN WANG 1),ZHAO YONG XU 1),JIN MING ZHAO 1) YI LI HU 2) 1) Seismological Bureau of Yunnan Province,Kunming 650041,China 2) Department of Geosciences,Yunnan University,Kunming 650091,China |
| |
| Abstract: | In this paper, the "spectral amplitude ratio method"(SAR) , "energy method"(EN) and "coda wave method"(CW) are used to calculate the Q value variations of gneiss in the preparing rupture process. The obtained results show that the variation state of Q values by SAR features the shape of relative stability gradual increment to the maximum then decrement and final rupture.The variation state of Q values by EN is just contrary to that by SAR,i.e.with the shape of stability decrement increment and final rupture . The varation state of Q values by CW is similar to that by EN, its main frequency features the shape of relatively high value decrement to the minimum increment and final rupture.But to the high frequency (higher than the main frequency),the variation state of Q values features the shape of the stable value increment to the maximum decrement and final rupture.At the same time, the results by coda wave amplitude spectrum show that, when stress reaches 70% of rupture stress, the high frequency component of S wave rapidly reduces( Q c increasing); at the time of impending the main rupture, the main frequency component reduces with a large scale( Q c increasing again), this may be the reason which causes the different variation states of two coda Q values.The result of amplitude spectra of P, S(initial wave) waves also show that with the appearance of microcracks the frequency band of S wave turn to be narrow, the high frequency component is reduced quickly, i.e. the S wave spectra have different variation states with different frequeny components. That is why the Q s obtained by different methods have different variation characteristics. |
| |
| Keywords: | rupturing process spectral amplitude ratio method energy method coda wave method Q value |
| 本文献已被 CNKI 等数据库收录！ |
|
