کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
809287 1468709 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Power-law singularity as a possible catastrophe warning observed in rock experiments
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Power-law singularity as a possible catastrophe warning observed in rock experiments
چکیده انگلیسی

The question which type of signals can be determinately related to catastrophic rupture in heterogeneous brittle media still remains open. Here we report a specific precursor of catastrophic rupture, i.e. a power-law singularity of responses, based on rock experiments. Our experimental observations show that the singularity with power exponent −β, where β=0.51±0.10 (mean±s.d.), appears ahead of catastrophic rupture in some rocks, and the singularity does not appear at all for gradual failure. It is indicated that the power-law singularity can emerge well only close to catastrophic rupture and thus it could serve as a specific warning for catastrophic rupture. To address the potential forewarning of imminent catastrophic rupture, a fitting process based on the data before catastrophic rupture was developed to determine the two unknowns related to the occurrence, catastrophe point UF and the power exponent −βu. It is demonstrated that the power-law singularity appears only in the vicinity of catastrophe, and that the power-law singularity does not occur for gradual failure.


► Power-law singularity as a possible catastrophe warning observed in rock experiments.
► The singularity of responses with power exponent −β, where β=0.51±0.10 (mean±s.d.).
► The power-law singularity appears only in the vicinity of catastrophe.
► The power-law singularity does not appear at all for gradual failure.
► A short-term forewarning of catastrophe might be possible.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Rock Mechanics and Mining Sciences - Volume 60, June 2013, Pages 253–262
نویسندگان
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