| 硐室爆破降振及振动信号小波包能量分析 |
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| 作者单位： | ;1.中国地质大学(北京);2.中国水利水电科学研究院;3.贵州铭豪爆破监理公司 |
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| 摘 要： | 塔罗金矿揭顶剥离硐室爆破是塔吉克斯坦迄今为止规模最大的一次爆破。根据地形、地质、环境条件和工程要求,合理地设计爆破参数、爆破网路和分段延时时间,较好地解决了硐室爆破振动带来的影响。振动监测结果表明,爆破降振取得良好效果。通过对塔罗金矿硐室爆破振动测试数据时域、频域(Fourier变换)和时频域(包括小波基的确定,小波包降噪阈值选取,小波包能量分析)的分析,总结出硐室爆破振动波能量主要集中在0～15.6Hz频带内,硐室爆破中增大单响药量,爆破振动波能量在低频带占比增大,而在高频带占比减小,水平和垂向主振频带(0～15.6Hz)能量占比99%所需的爆心距将缩短。随着爆心距的增加,垂向能量占比呈现先降低后升高的趋势,水平向能量占比呈现振荡走高的趋势。
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| 关 键 词： | 硐室爆破 振动测试 小波基 降噪 小波包能量分析 |
SAFETY RISK ASSESSMENT OF DAM AGAINST TERRORIST ATTACKS BY AHP |
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| Affiliation: | ,CAO Gui-xiang(Fujian Province Minxi Communication Engineering Co.Ltd.,Xiamen 361012, China) |
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| Abstract: | Based on the distribution and function characteristics of the reservoir dams in our country,the overview of dams,destructive ways of terrorist attack,the consequences of dam break were used as factors to evaluation attacked dam safety risk grade.Multi-criteria decision of analytic hierarchy process was used for dam in safety risk assessment,the weight value sorting of each index which influenced dam terrorist attack was obtained,and a quantitative calculation formula for against terrorism safety risk assessment was provided.Finally,the method's feasibility was discussed by an engineering example of Shibianyu reservoir dam. |
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| Keywords: | Reservoir dam Against terrorism safety Analytic hierarchy process(AHP) Risk evaluation |
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