A Numerical Test on Influence of Mesoscopic Heterogeneity on Macroscopic Behavior of Rock Failure and Seismic Sequence types

Mingruo, Jiao; Tang, Chun’an; Zhang, Guomin; Shi, Yueyue; Hou, Wankai

doi:10.1002/cjg2.414

Cited by 8 publications

(6 citation statements)

References 4 publications

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“…The understanding of thermal cracking behaviors of rock not only helps to explain the internal structure of the earth, the mechanism of earthquake and the related theoretical problems but also can be used in a great many engineering fields such as petrolic exploitation [1] , nucleus waste storage, geothermal energy exploitation, coal underground gasification, super-deep mining and locating deep mineral resources [2,3] . So it has become a new field in rock mechanics and some valuable achievements have been obtained in the past decades.…”

Section: Introductionmentioning

confidence: 99%

Process of Sandstone Thermal Cracking

Zhang

Xian

Zhao

2005

Chinese J. Geophys.

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An investigation into the characteristics of mineral formation, micro configuration and inner micro thermal crack development has been made in micro scale in laboratory. The observed rock is the fine sandstone from Fuxin of Liaoning province. MPV‐SP micro‐photometer made by Leica Co., Germany has been used and the heating scope ranges from room temperature to 1350°C in the experiment. The result shows that the micro cracks of this fine sandstone acutely increase after 150°C and later reach to a peak. The number of cracks begins to descend when the temperature is over 210°C and gradually stabilizes. The second peak of the cracks appears at 810°C. There exists a thermal crack threshold with the change of temperature for fine sandstone.

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Section: Introductionmentioning

confidence: 99%

Process of Sandstone Thermal Cracking

Zhang

Xian

Zhao

2005

Chinese J. Geophys.

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“…These results signify that the precursory pattern of tidal triggering of earthquakes in these six regions is possibly related to the heterogeneities of the crustal rocks. In fact, the heterogeneities of the rock can strongly influence the non-linear behavior of rock deformation (Jiao et al, 2003); for example, under a condition of high stress, a high degree of heterogeneity can increase the non-linear behavior of rock deformation, while a low degree of heterogeneity can decrease this behavior. This non-linear behavior of rock deformation is the prerequisite for a critical stress state (Yin and Yin, 1991) in which the tidal stress could trigger an earthquake.…”

Section: Discussionmentioning

confidence: 99%

Precursory pattern of tidal triggering of earthquakes in six regions of China: the possible relation to the crustal heterogeneity

2013

Nat. Hazards Earth Syst. Sci.

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Abstract.We found the possible correlation between the precursory pattern of tidal triggering of earthquakes and the crustal heterogeneities, which is of particular importance to the researchers in earthquake prediction and earthquake hazard prevention. We investigated the connection between the tidal variations and earthquake occurrence in the Liyang, Wunansha, Cangshan, Wenan, Luquan and Yaoan regions of China. Most of the regions show a higher correlation with tidal triggering in several years preceding the large or destructive earthquakes compared to other times, indicating that the tidal triggering may inherently relate to the nucleation of the destructive earthquakes during this time. In addition, the analysis results indicate that the Liyang, Cangshan and Luquan regions, with stronger heterogeneity, show statistically significant effects of tidal triggering preceding the large or destructive earthquakes, while the Wunansha, Wenan and Yaoan regions, with relatively weak heterogeneity, show statistically insignificant effects of it, signifying that the precursory pattern of tidal triggering of earthquakes in these six regions is possibly related to the heterogeneities of the crustal rocks. The above results suggest that when people try to find the potential earthquake hazardous areas or make middle-long-term earthquake forecasting by means of precursory pattern of the tidal triggering, the crustal heterogeneity in these areas has to be taken into consideration for the purpose of increasing the prediction efficiency. If they do not consider the influence of crustal heterogeneity on the tidal triggering of earthquakes, the prediction efficiency might greatly decrease.

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“…In general, foreshocks occurring around the epicentral area can be considered as tectonic precursors, as they result from occasional plates' shifting or blocks shifting along the fault plane that will break [8]. They most frequently occur in areas featuring moderately heterogeneous rocks [9] and in the presence of a moderate pre-stress and rupture stress [10].…”

Section: Foreshocks' Characteristicsmentioning

confidence: 99%

How to Identify Foreshocks in Seismic Sequences to Predict Strong Earthquakes

Riga¹,

Balocchi²

2017

OJER

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The time analysis of seismic events preceding several strong earthquakes occurred in recent decades throughout the world, has highlighted some foreshocks' characteristics, which are helpful for their discrimination compared to other types of events. These features can be identified within the seismic sequence and used as strong events' precursors. Through the energy release pattern analysis, which precedes any strong earthquakes, in this study we describe some graphical procedures suitable for distinguishing a foreshock from any other type of earthquake. We have broadly divided foreshocks into two classes, depending on their position within the energy release pattern, by describing some relationships between the foreshock's magnitude and the following earthquake's. The results obtained show how the energy release pattern of some major earthquakes has distinctive features and repeatability which it is possible to obtain information from in order to perform sufficiently reliable short-term forecasts.

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A Numerical Test on Influence of Mesoscopic Heterogeneity on Macroscopic Behavior of Rock Failure and Seismic Sequence types

Cited by 8 publications

References 4 publications

Process of Sandstone Thermal Cracking

Process of Sandstone Thermal Cracking

Precursory pattern of tidal triggering of earthquakes in six regions of China: the possible relation to the crustal heterogeneity

How to Identify Foreshocks in Seismic Sequences to Predict Strong Earthquakes

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