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Application of R/S method for dynamic analysis of additional strain and fracture warning in shaft lining
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نویسنده
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zhao g. ,zhou g. ,wang j.
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منبع
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journal of sensors - 2015 - دوره : 2015 - شماره : 0
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چکیده
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In the past few decades,enormous losses have been induced by hundreds of vertical shafts collapse. this study is based on long-term in situ monitoring data of several mines with overburden soil layers in east china in the past six years. r / s modeling based on fractal theory was used to analyze the development of additional strains in shafts by using hurst exponent. it can be found that from the monitoring results the hurst effect is significant ranging from 0.5 to 1.0. its trend also is in good agreement with forward-biased random distribution. hence,r / s method can be used to predict the additional strain along the shaft lining. in this paper,hurst exponent shows an irregular phenomenon before cracking. it is proved that hurst exponent can be used to predicate the progressive failure of shaft lining from abnormal state to normal state. this paper presents the prediction of shaft lining failures using strains measured by embedded strain gauges in the thick overburden soil layers in east china. © 2015 guangsi zhao et al.
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آدرس
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state key laboratory for geomechanics and deep underground engineering,china university of mining and technology,xuzhou,china,department of civil and environmental engineering,hong kong polytechnic university,hung hom,hong kong,school of mechanics and civil engineering,china university of mining and technology, China, state key laboratory for geomechanics and deep underground engineering,china university of mining and technology, China, state key laboratory for geomechanics and deep underground engineering,china university of mining and technology, China
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Authors
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