基于HHT的延期时间识别法在精确短延时爆破优化中的应用（英文）

发布时间：2018-04-14 16:16

本文选题：延期时间识别 + 短延时爆破　；参考：《Transactions of Nonferrous Metals Society of China》2016年07期

【摘要】：延时爆破中延期时间的准确识别对于优化爆破设计和降低爆破振动效应具有重要作用。以超大断面调压竖井导井爆破为例,对比分析了基于Hilbert-Huang变换(HHT)的EMD识别法和瞬时能量识别法在精确短延时爆破中的延期时间识别能力,发现EMD识别法的识别率在80%以上,而瞬时能量法识别率低于25%。通过单孔爆破振动信号瞬时能量分析表明,瞬时能量识别法适用于延期时间大于瞬时能量峰值半周期的微差爆破。将EMD识别法应用于紫金山露天矿微差爆破延期时间识别,为降低爆破振动和爆破大块率,以识别结果为依据对爆破参数进行了优化。现场实测数据表明:通过优化起爆雷管和延期时间,相同单孔药量下爆破振动降低30%以上;结合压渣爆破和前排抵抗线优化,爆破块度成功降低到3%以下。研究结果证明了基于HHT的延期时间识别法能有效实现爆破设计的优化,该识别方法对于其他类似爆破工程的设计优化具有一定的参考价值。
[Abstract]:The accurate identification of delay time in delay blasting plays an important role in optimizing blasting design and reducing blasting vibration effect.In this paper, the delay time recognition ability of EMD recognition method based on Hilbert-Huang transform and instantaneous energy recognition method in accurate short delay blasting is compared and analyzed with the example of pilot well blasting of oversize section pressure regulating shaft. It is found that the recognition rate of EMD recognition method is more than 80%.The recognition rate of instantaneous energy method is less than 25.The instantaneous energy analysis of the vibration signal of single hole blasting shows that the instantaneous energy identification method is suitable for millisecond blasting with delay time longer than the half period of instantaneous energy peak.The EMD recognition method is applied to the delay time identification of millisecond blasting in Zijinshan opencast mine. In order to reduce the blasting vibration and blasting boulder rate, the blasting parameters are optimized based on the identification results.The field measured data show that the blasting vibration is reduced by more than 30% under the same charge of single hole by optimizing the detonator and the delay time, and the blasting fragmentation is reduced to less than 3% by combining with the slagging blasting and the optimization of the front row resistance line.The results show that the delay time recognition method based on HHT can effectively realize the optimization of blasting design, and this method has certain reference value for the design optimization of other similar blasting projects.
【作者单位】：中南大学资源与安全工程学院;
【基金】：Project(2013BAB02B05)supported by the National 12th Five-Year Science and Technology Supporting Plan of China Project(2015CX005)supported by the Innovation Driven Plan of Central South University of China Project(2016zzts094)supported by the Fundamental Research Funds for the Central Universities of Central South University,China
【分类号】：TD235

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