基于核磁共振技术的岩体爆破损伤试验研究

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Abstract Evaluation of blasting damage degree and range of rock mass is important in the blasting parameter design and structure support. Based on the comprehensive analysis of the current methods in studying rock mass damage caused by blasting，the nuclear magnetic resonance(NMR) detection technique is introduced. Beginning with studying the essential reason of blasting damage，the porosity and T2 spectrum distribution are regarded as the criterion，as well as the NMR images，the range of rock mass blasting damage is quantificationally analyzed. Combined with the ultrasonic testing and rock mechanics strength measurement techniques，the NMR results are discussed and compared. In addition，the relationship between the NMR characteristics and rock mass strength has been discussed，which conform to exponential distribution. And a prediction mathematical model of uniaxial compressive strength is established based on the NMR results. The results show that the practicability and accuracy of NMR are better，which opens up a new technical method for studying the blasting damage of rock mass.

Key words： rock mechanics blasting damage damage range nuclear magnetic resonance(NMR) experiment

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I7/1410

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