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1.
Ｐｒｅｓｅｎｔａｄｄｒｅｓｓ：ＳｏｕｔｈＣａｌｉｆｏｒｎｉａＵｎｉｖｅｒｓｉｔｙ，ＵＳＡ．ＣｏｎｔｒｉｂｕｔｉｏｎＮｏ．９３Ａ００３２，ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＳＳＢ，Ｃｈｉｎａ．ａｎｄｓｔａｔｉｏｎａｒｅｓｅｐａｒａｔｅ，ｓｕｐｐｏｓｉｎｇａｒａｎｄｏｍａｎｄｈｏｍｏｇｅｎｅｏｕｓｄｉｓｔｒｉｂｕｔｉｏｎｏｆｔｈｅｓｃａｔｔｅｒｓｉｎａｔｈｒｅｅ－ｄｉｍｅｎｓｉｏｎａｌｉｎｆｉｎｉｔｅａｎｄｐｅｒｆｅｃｔｌｙｅｌａｓｔｉｃｍｅｄｉｕｍ．ＴｈｅｅｎｅｒｇｙｄｅｎｓｉｔｙａｔａｄｉｓｔａｎｃｅｏｆｒｉｓｇｉｖｅｎａｓＥ（ｒ，ｔ｜ω）＝［Ｗ０（ω）ｇ０（ω）］／（４πｒ２）．Ｋ（ｖｔ／ｒ）．ｅｘｐ（－ωＱｃ－１ｔ）ｖｔ＞ｒ（２）ＷｈｅｒｅＫ（ｘ）＝（１／ｘ）ｌｎ［（ｘ＋１）／（ｘ－１）］，ａｎｄｇ０（ω）ｉｓｔｈｅｔｏｔａｌｓｃａｔｔｅｒｉｎｇｃｏｅｆｆｉｃｉｅｎｔｃｈａｒａｃｔｅｒｉｚｉｎｇａｓｃａｔｔｅｒｉｎｇｐｏｗｅｒｐｅｒｕｎｉｔｖｏｌｕｍｅｏｆｔｈｅｈｏｍｏｇｅｎｅｏｕｓｍｅｄｉｕｍ．Ｃｏｍｐａｒｉｓｏｎｏｆｖａｒｉｏｕｓｏｂｓｅｒｖａｔｉｏｎｓｉｎｃｌｕｄｉｎｇｃｏｄａｄｅｃａｙ 相似文献
2.
Seismogenic mechanism of the Lancang and Gengma earthquakes 总被引：1，自引：0，他引：1
Ｓｅｉｓｍｏｇｅｎｉｃ ｍｅｃｈａｎｉｓｍ ｏｆ ｔｈｅ Ｌａｎｃａｎｇ ａｎｄ Ｇｅｎｇｍａ ｅａｒｔｈｑｕａｋｅｓ（俞维贤）（周瑞琦）（候学英）（周光全）ＳｅｉｓｍｏｇｅｎｉｃｍｅｃｈａｎｉｓｍｏｆｔｈｅＬａｎｃａｎｇａｎｄＧｅｎｇｍａｅａｒｔｈ... 相似文献
3.
Ｓｔｕｄｙ ｏｎ ｔｅｃｔｏｎｉｃ ｓｔｒｅｓｓ ｏｆ Ｚｈｏｎｇｙｕａｎ ｏｉｌ ｆｉｅｌｄ ｗｉｔｈ ｗｅｌｌｂｏｒｅ ｂｒｅａｋｏｕｔ ｄａｔａ（黄雨蕊）（许忠淮）（高阿甲）（谭廷栋）ＳｔｕｄｙｏｎｔｅｃｔｏｎｉｃｓｔｒｅｓｓｏｆＺｈｏｎｇｙｕ... 相似文献
4.
ＴｈｅｓｔａｔｉｓｔｉｃａｌｌａｗｓｏｆｓｔｒｏｎｇｓｅｉｓｍｉｃｍｏｔｉｏｎｐｈａｓｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓＸｉｎｇＪＩＮ（金星）ａｎｄＺｈｅｎ－ＰｅｎｇＬＩＡＯ（廖振鹏）（ＩｎｓｔｉｔｕｔｅｏｆＥｎｇｉｎｅｅｒｉｎｇＭｅｃｈａｎｉｃｓ，Ｓ... 相似文献
5.
Ｃｈａｒａｃｔｅｒｉｓｔｉｃｓ ａｎｄ ａｎａｌｙｓｉｓ ｏｆ ｔｈｅ ｇｅｏｍａｇｎｅｔｉｃ ｖａｒｉａｔｉｏｎｓ ｉｎ ｒｅｇｉｏｎｓ ａｒｏｕｎｄ ｔｈｅ Ｑｉｏｎｇｚｈｏｕ Ｓｔｒａｉｔ（范国华）（姚同起）（顾左文）（朱克佳）（陈伯舫）（冯戬... 相似文献
6.
ＲｅｓｅａｒｃｈｏｆｐａｔｔｅｒｎｄｙｎａｍｉｃｓｐａｒａｍｅｔｅｒｓｏｆｃｒｕｓｔａｌｄｅｆｏｒｍａｔｉｏｎｆｉｅｌｄｉｎｓｅｉｓｍｏｇｅｎｉｃｐｒｏｃｅｓｓＳｈｕｏ－ＹｕＺＨＯＵ（周硕愚），ＹｕｎＷＵ（吴云），Ｒｕｏ－ＢｏＷＡＮＧ（王若柏）ａｎｄ... 相似文献
7.
ＲｅｓｅａｒｃｈｏｎｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｍａｇｎｉｔｕｄｅｓｔｒｕｃｔｕｒｅｏｆｅａｒｔｈｑｕａｋｅｓｅｑｕｅｎｃｅｓＰＥＩ－ＱＩＮＧＳＵＮ（孙佩卿）ＱＩＮ－ＺＵＬＩ（李钦祖）ＹＩＮＧ－ＨＵＡＤＡＩ（戴英华）ＪＵＮＺＨＡＯ（赵军）Ｓｅ... 相似文献
8.
ＳｔａｔｉｃｓｏｌｕｔｉｏｎｏｆａｃｒａｃｋｄｅｇｅｎｅｒａｔｅｄｆｒｏｍｄｙｎａｍｉｃｓｏｌｕｔｉｏｎｏｆａｐｒｏｐａｇａｔｉｎｇｃｒａｃｋＳｈｉ－ＹｕＬＩ（李世愚）ａｎｄＹｕｎ－ＴａｉＣＨＥＮ（陈运泰）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ... 相似文献
9.
Mechanical analysis of en echelon structure and its significance of controlling earthquakes 总被引：1，自引：0，他引：1
ＭｅｃｈａｎｉｃａｌａｎａｌｙｓｉｓｏｆｅｎｅｃｈｅｌｏｎｓｔｒｕｃｔｕｒｅａｎｄｉｔｓｓｉｇｎｉｆｉｃａｎｃｅｏｆｃｏｎｔｒｏｌｌｉｎｇｅａｒｔｈｑｕａｋｅｓＸｉｎ－ＳｈｅｎｇＸＩＥ（谢新生）ａｎｄＸｉａｏ－ＰｉｎｇＲＵＡＮ（阮小平）（Ｉｎｓｔｉｔ... 相似文献
10.
Ｔｈｒｅｅ ｄｉｍｅｎｓｉｏｎａｌ ｖｅｌｏｃｉｔｙ ｓｔｒｕｃｔｕｒｅ ｂｅｎｅａｔｈ ｔｈｅ Ｋｕｎｍｉｎｇ Ｔｅｌｅｍｅｔｅｒｅｄ Ｓｅｉｓｍｉｃ Ｎｅｔｗｏｒｋ（王椿镛）（王溪莉）（颜其中）Ｔｈｒｅｅｄｉｍｅｎｓｉｏｎａｌｖｅｌｏｃｉｔｙｓｔ... 相似文献
11.
12.
岩石变形破裂过程中电荷感应信号的检测 总被引：9，自引：0，他引：9
设计了采用非接触方式、高放大倍数、高效率的电荷传感器,并给出了电荷传感器的设计原理和技术指标。利用研制的电荷传感器对岩石变形破裂过程中产生的电荷感应信号进行了检测试验。结果表明,岩石在变形破裂过程中会产生电荷感应信号,并能够被研制的电荷传感器检测到;电荷感应信号是瞬时脉冲的;随着加载应力水平的增加,电荷感应信号强度增强,在峰值应力前,电荷感应信号强度达到最大值;在破裂面接收到的电荷感应信号较强,主破裂面接收到的信号最强,因而电荷的产生和岩石的破裂有很大的关系。作为正在探索的检测岩石破坏过程的手段之一,电荷感应方法应是一种很具潜力的方法,值得深入研究。 相似文献
13.
G. I. Druzhin V. N. Uvarov V. A. Mullayarov V. I. Kozlov A. A. Korsakov 《Geomagnetism and Aeronomy》2010,50(2):211-218
The effect of the solar eclipse that occurred on August 1, 2008, on the level of the natural electro-magnetic emission signals
in the ELF-VLF range, simultaneously observed at Kamchatka and in Yakutsk, and the variations in the amplitude and phase of
signals from the VLF radiostations, registered in Yakutsk, has been considered. The VLF radiostations in Krasnodar, Novosibirsk,
and Khabarovsk successively emitted signals at frequencies of 11 905, 12 649, and 14 880 Hz. Based on the observations of
the signals from these radiostations, it has been established that the signal amplitudes and phases increased by 3–5% and
30°–45° when the signals crossed the lunar shadow region. The synchronous registration of the ELF-VLF noise emission indicated
that a bay-like increase and the following decrease in the emission to the background level was observed at both receiving
points during the eclipse from ∼1000 to 1130 UT. This effect was registered at frequencies of 0.6–5.6 kHz in Yakutsk and at
lower (30–200 Hz) and higher (2.5–11 kHz) frequencies at Kamchatka. In this case the noise emission intensity maximum was
observed when the lunar shadow maximally approached the registration point. At higher frequencies, the emission maximum was
observed simultaneously at both points (at 1100 UT) but with a delay relative to the maximum at lower frequencies. The possible
causes of the appearance of the solar eclipse effects in the natural ELF-VLF emission are considered. 相似文献
14.
本文全面系统地研究了1960——1987年广州地磁台转换函数的变化.结果表明:(1)季节变化的特点是夏季幅度大,冬季幅度小,具有12和6个月的主要周期成份;长期变化则表现以每年0.0025的速率下降.转换函数 B 的长期变化和季节变化不明显;(2)由转换函数 A,B 求出的帕金森矢量的方向明显地受海洋的影响,反映了海洋效应;(3)转换函数 A,B 的逐月值与地磁活动相关,而年均值与地磁活动无关.A 的年均值无明显的11年或22年周期.长期变化可能主要受地球内部电性结构的影响. 相似文献
15.
《地震学报(英文版)》1996,9(3):447-454
In order to investigate the physical mechanism of seismo-electromagnetic signals, many scholars from China and other countries
have carried out laboratory and field experiments of rock samples by loading them up to fracture in recent ten-odd years.
In each of these experiments, the phenomenon of electromagnetic radiation was observed during the process of rock sample fracture.
However, the experimental results can not explain the non-synchronous electromagnetic radiation in actual observation records.
In these records, some stations displayed anomalies but some others did not, and the signals of different frequency bands
observed by the same station did not occur simultaneously. This has brought about many difficulties to the application of
electromagnetic radiation in earthquake prediction. The experimental result of this paper can explain the phenomenon of non-synchronous
electromagnetic radiation. In the experiment of this paper, rock samples are uniaxially compressed up to fracture. The antennas
of different frequency bands are installed two meters away from the rock sample in different directions. The electromagnetic
signals during the whole process of rock sample fracture are recorded synchronously by a 14-channel tape recorder. The experimental
results are as follows: (1) signals of the four frequency bands: VLF, MF, HF and VHF, are all recorded during the main fracturing
process of rock samples, but signals of different frequencies may somtimes occur non-synchronously; (2) the intensity of electromagnetic
radiation is the highest at the moment when the main fracture occurs, but signals in different directions are of different
intensities. The above results are consistent with the non-synchronous electromagnetic radiation observed in real earthquakes.
It seems possible to predict the orientation of future seismic source by the electromagnetic method of the LF or VLF frequency
bands.
Contribution No. 95A0075, Institute of Geophysics, SSB, China.
The paper is translated by Prof.Jie-Fan HUANG, Peking University from the Chinese into English version. 相似文献
16.
17.
在常温下、单轴加压下对两种岩石完整样品进行蠕变破坏过程中声发射活动实验.根据实验获得的数据讨论了蠕变三个阶段中声发射活动特征.在瞬态蠕变阶段,随着加载,声发射活动逐渐增强;在稳态蠕变阶段,在较低的声发射活动背景上,可能出现较强的信号,声发射幅值-频度关系的 m 值可能稳定于某一低值,也可能下降;进入加速蠕变阶段,声发射活动水平增强,m 值下降加快,也可能表现为明显回升后再下降,并与岩石样品的性质有关.将蠕变破坏三个阶段中声发射活动与地震孕育过程中某些地震活动图象变化(如 b 值、前震活动)进行了联系,提出地壳岩石蠕变破坏机制形成前震——主震——(余震)型地震序列类型的可能性. 相似文献
18.
We have made a data collection and analysis system for recording microcracks in rock to study the three dimensional pattern
of fracture and the dynamic properties of rock during pressurization. This system, with 8 channel data detection, records
in real-time, from the initial microcracks to the final vibration waveform excited by the master fracture. The detected data
are recorded digitally at the hard disk of an IBM computer (or 286, 386 personal computer) as well as transmitted to disk.
The sampling rate for each channel is 10 MHz.
Collecting every acoustic emission events in the loaded rock sample with 8 channels by this system, mathematically modelling
the AE event travel time, and taking the coordinates of the AE event hypocenter and the three components of P wave velocity
as unknown parameters, we set up a set of residual equations for joint inversion, so that the three dimensional localization
of AE event hypocenters can be completed under variable velocities, which will lay foundations for the research on rock fracture
clearly.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismological Sinica,13, 489–495, 1991.
The design and development of the system, and the experiments are sponsored by the Chinese Joint Seismological Science Foundation. 相似文献
19.
运用研制的KBD5矿用本安型电磁辐射监测仪测试了煤矿采掘过程中工作面煤岩体的电磁辐射，分析了电磁信号与采掘工艺及煤岩动力灾害危险性等的关系。研究表明，煤矿采掘过程伴随产生电磁辐射，电磁辐射是煤岩体受到采动影响后应力重新分布或变形破裂趋向新平衡的结果；有煤与瓦斯突出和冲击地压危险时，有明显的电磁异常前兆；采取防治措施后，电磁辐射显著下降。电磁辐射技术在煤矿可以用于预测煤与瓦斯突出、冲击地压等煤岩动力灾害。 相似文献
20.
Experimental study on the mechanism of non-synchronism of seismo-electromagnetic radiation precursors 总被引：1，自引：0，他引：1
ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｒｏｕｇｈ２０－ｏｄｄｙｅａｒｓ’ｏｂｓｅｒｖａｔｉｏｎａｎｄｓｔｕｄｙａｆｔｅｒｔｈｅ１９７６Ｔａｎｇｓｈａｎｇｒｅａｔｅａｒｔｈｑｕａｋｅ,ｔｈｅｓｅｉｓｍｏ－ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｒａｄｉａｔｉｏｎｐｒｅｃ... 相似文献