{"title":"地压冲击波与光纤光栅耦合机理的理论研究","authors":"S. Wei, Zesheng Zhang, Yao Wang","doi":"10.4236/wjet.2020.84057","DOIUrl":null,"url":null,"abstract":"To achieve \nthe monitor of rock burst in coal mine with fiber Bragg grating (FBG) sensing, the \ncoupling mechanism between FBG and shock waves was theoretically analyzed. Based on Housner’s random shock \nmodel, the coupling mechanism between shock waves and FBG was theoretically \nanalyzed. The result shows that the wave will change the period Ʌ and \neffective refractive index n of FBG, and further \naffect the initial wavelength value. The amplitude, phase and frequency of \nshock wave are directly related to the wavelength drifts of FBG. The \ntransmitting velocity of shock wave in rock is affected by lithologic \ncharacteristics. The Elastic modulus, density and Poisson’s ratio of rock \ninfluence the initial wavelength value of FBG. This study provided a \ntheoretical basis and practical application guidance for coal or rock burst \nmonitoring with FBG sensing.","PeriodicalId":344331,"journal":{"name":"World Journal of Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Theoretical Study of Coupling Mechanism between FBG and Shock Waves of Rock Burst\",\"authors\":\"S. Wei, Zesheng Zhang, Yao Wang\",\"doi\":\"10.4236/wjet.2020.84057\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"To achieve \\nthe monitor of rock burst in coal mine with fiber Bragg grating (FBG) sensing, the \\ncoupling mechanism between FBG and shock waves was theoretically analyzed. Based on Housner’s random shock \\nmodel, the coupling mechanism between shock waves and FBG was theoretically \\nanalyzed. The result shows that the wave will change the period Ʌ and \\neffective refractive index n of FBG, and further \\naffect the initial wavelength value. The amplitude, phase and frequency of \\nshock wave are directly related to the wavelength drifts of FBG. The \\ntransmitting velocity of shock wave in rock is affected by lithologic \\ncharacteristics. The Elastic modulus, density and Poisson’s ratio of rock \\ninfluence the initial wavelength value of FBG. This study provided a \\ntheoretical basis and practical application guidance for coal or rock burst \\nmonitoring with FBG sensing.\",\"PeriodicalId\":344331,\"journal\":{\"name\":\"World Journal of Engineering and Technology\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-09-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"World Journal of Engineering and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4236/wjet.2020.84057\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"World Journal of Engineering and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4236/wjet.2020.84057","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Theoretical Study of Coupling Mechanism between FBG and Shock Waves of Rock Burst
To achieve
the monitor of rock burst in coal mine with fiber Bragg grating (FBG) sensing, the
coupling mechanism between FBG and shock waves was theoretically analyzed. Based on Housner’s random shock
model, the coupling mechanism between shock waves and FBG was theoretically
analyzed. The result shows that the wave will change the period Ʌ and
effective refractive index n of FBG, and further
affect the initial wavelength value. The amplitude, phase and frequency of
shock wave are directly related to the wavelength drifts of FBG. The
transmitting velocity of shock wave in rock is affected by lithologic
characteristics. The Elastic modulus, density and Poisson’s ratio of rock
influence the initial wavelength value of FBG. This study provided a
theoretical basis and practical application guidance for coal or rock burst
monitoring with FBG sensing.