Effect of temperature on the physical precursors of rock block failure

Baddari, Kamel; Frolov, A. A.; Tourtchine, Victor; Makdeche, Said; Rahmoune, F.

doi:10.2478/s11600-012-0038-4

Cited by 3 publications

(13 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…regions Results of experimental investigations of failure show spatial distributions of cracks in rocks obey the fractal statistics (Sobolev 1995, Zavyalov 2006, Baddari et al 2012. In a chaotic distribution of microcracks, the probability of the formation of a set of x adjacent cracks, i.e., the transition from delocalization to localization, is…”

Section: Variations Of the Crack Concentration Parameter In The Seismmentioning

confidence: 99%

“…Several methods are used in earthquake science to describe their physical processes. The earthquake, in laboratory experiments, is associated to a process of evolution and concentration of microruptures at various scales to give place finally to a main macrorupture inducing the instability and the destruction of the medium (Sobolev and Ponomarev 2003, Baddari et al 1999, 2012. The random distribution of the ruptures in the stress field can be approached using the Poisson distribution (Zavyalov 2006, Baddari et al 2011.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Some Probabilistic and Statistical Properties of the Seismic Regime of Zemmouri (Algeria) Seismoactive Zone

et al. 2016

Self Cite

View full text Add to dashboard Cite

Statistical tests have been used to adjust the Zemmouri seismic data using a distribution function. The Pareto law has been used and the probabilities of various expected earthquakes were computed. A mathematical expression giving the quantiles was established. The extreme values limiting law confirmed the accuracy of the adjustment method. Using the moment magnitude scale, a probabilistic model was made to predict the occurrences of strong earthquakes. The seismic structure has been characterized by the slope of the recurrence plot Ȗ, fractal dimension D, concentration parameter K sr , Hurst exponents H r and H t. The values of D, Ȗ, K sr , H r , and H t diminished many months before the principal seismic shock (M = 6.9) of the studied seismoactive zone has occurred. Three stages of the deformation of the geophysical medium are manifested in the variation of the coefficient G of the clustering of minor seismic events.

show abstract

Section: Variations Of the Crack Concentration Parameter In The Seismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Some Probabilistic and Statistical Properties of the Seismic Regime of Zemmouri (Algeria) Seismoactive Zone

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…The axial load was measured at the rate of 1s intervals on a PC. Experimental equipment and techniques were described in details in our previous work (Baddari et al 2011(Baddari et al , 2012. Laboratory experiments using the inverse loading technique by acoustic emission enabled us to extend the final phase of source development and analyze in details the acoustic regime (Baddari and Frolov 2010, Dresen et al 2010, Lockner et al 1991, Smirnov et al 2010).…”

Section: Rock Samples and Deformation Apparatusmentioning

confidence: 99%

“…Numerous experiments have been executed in order to understand the process of deformation and the failure of rock samples in relation with the evolution of mechanical instability within the rock masses during geodynamic processes in the earth crust (Benson et al 2007, Heap et al 2011, Bizzari and Cocco 2006, Kuksenko 2005, Schubnel and Guéguen 2003, Zang et al 2000. Several physical precursors were recorded as the time of rock failure approaches (Adushkin and Turuntaev 2005, Baddari et al 2011, 2012, Darot and Reuschlé 2000, Heap et al 2009, Jouniaux et al 2001, Cai and Liu 2009, Sobolev 1995. The aim of seismic process experiments modeling in laboratory conditions was to ensure some sort of similarity to natural process (Baddari et al 1996, Brace and Kohlstedt 1980, Glover et al 1996, Jouniaux et al 2006.…”

Section: Introductionmentioning

confidence: 99%

“…It is known that the acoustic emission (AE) due to water infusion into loaded samples is a possible model of swarm seismicity (Smirnov et al 2010, Sobolev et al 2010. The effects of temperature on the physicomechanical properties of rock samples and the thermal cracking effects on physical rock properties have been studied by Baddari et al (2012), David et al (1999), Fortin et al (2011), Vinciguerra et al (2005), and Wan et al (2009). The thermal cracking effect was also studied by Reuschlé et al (2006).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Stress-Strain Conditions on Physical Precursors and Failure Stages Development in Rock Samples

et al. 2015

Self Cite

View full text Add to dashboard Cite

Precursory stages of failure development in large rock samples were studied and simultaneous observations of the space-time variation of several physical fields were carried out under different stress-strain states. The failure process was studied in detail. A hierarchical structure of discreet rock medium was obtained after loading. It was found that the moisture reduced the rock strength, increased the microcrack distribution and influenced the shape of the failure physical precursors. The rise in temperature up to 400 °C affected the physical precursors at the intermediate and final stages of the failure. Significant variations were detected in the acoustic and electromagnetic emissions. The coalescence criterion was slightly depending on the rock moisture and temperature effect. The possibility of identifying the precursory stage of failure at different strain conditions by means of a complex parameter derived from the convolution of physical recorded data is shown. The obtained results point out the efficiency of the laboratory modelling of seismic processes.

show abstract

Fracture in heterogeneous materials: experimental and theoretical studies

Kuksenko

Makhmudov

2017

Russian Geology and Geophysics

View full text Add to dashboard Cite

The kinetics of fracture in stressed heterogeneous materials is investigated in a differentiated way using the parameter Δt, the interval between single or multiple (cooperative) microfracture events recorded by acoustic emission (AE) responses. The patterns of fracture nucleation and growth, which is a statistic process, are controlled by the heterogeneity of deforming material. There are two important aspects revealed by the study: 1) structural heterogeneity of materials causes uneven distribution of stress in loaded solids and thus creates local zones of microstress and ensuing microfracture in the overstressed zones; 2) AE measurements and microseismic monitoring are applicable to prediction of fracture by locating its source and thus allows predicting related hazard in mines, tunnels, bridges, nuclear-power plants, and other important engineering objects.

show abstract

Effect of temperature on the physical precursors of rock block failure

Cited by 3 publications

References 39 publications

Some Probabilistic and Statistical Properties of the Seismic Regime of Zemmouri (Algeria) Seismoactive Zone

Some Probabilistic and Statistical Properties of the Seismic Regime of Zemmouri (Algeria) Seismoactive Zone

Effect of Stress-Strain Conditions on Physical Precursors and Failure Stages Development in Rock Samples

Fracture in heterogeneous materials: experimental and theoretical studies

Contact Info

Product

Resources

About