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有色金属工程:2020,(10):105-111
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基于差分进化算法的矿震震源谱参数反演
张晓朴
(矿冶科技集团有限公司)
Inversion of Mine Microseismic Source Spectrum Parameters Based on Differential Evolution Algorithm
zhangxiaopu
(BGRIMM Technology Group)
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投稿时间:2020-06-01    修订日期:2020-06-15
中文摘要: 针对地震震源谱的零频极限及拐角频率参数反演计算,本文提出采用差分进化算法,并选取四种不同差分进化策略,利用矿山地震监测系统记录的采矿诱发矿震的地震波资料及Brune位错模型,对零频极限及拐角频率进行反演。经过差分进化算法反演,并与遗传算法反演结果对比,确定差分进化算法能够实现零频极限及拐角频率的精确计算。同时,研究发现针对多元非线性Brune位错模型进行差分进化反演,其变异策略中的rand相比best,更能够实现全局寻优能力,避免陷入搜索停止,出现早熟现象。再根据反演的零频极限和拐角频率,进而计算地震矩、震源半径及视应力等震源参数,从而为研究采矿区域应力分布、集中及释放规律、判别开采作业区域安全提供了很好的途径。
Abstract:Aiming at inverse calculation of the flat level and corner frequency parameters of the seismic source spectrum, this paper proposes to use differential evolution algorithm and select four different differential evolution strategies. Using the seismic waves data of mining-induced micro-seismic recorded by the mine micro-seismic monitoring system and the Brune dislocation model, inversion of the flat level and corner frequency was carried out. Through the inversion of the differential evolution algorithm and the comparison of the inversion results of the genetic algorithm, it is determined that the differential evolution algorithm can achieve the accurate calculation of the flat level and the corner frequency. At the same time, the study found that for the differential evolution inversion of the multivariate nonlinear Brune dislocation model, the rand in its mutation strategy is better than the best, which can achieve the global optimization ability, avoid falling into the search stop and premature phenomenon. Based on the flat level and corner frequency of the inversion, the seismic moment, focal radius and apparent stress and other focal parameters are calculated, which provides a good way to study the stress distribution, concentration and release rules of the mining area, and to judge the safety of the mining operation area.
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基金项目:中国-南非矿产资源开发利用联合研究中心
引用文本:
张晓朴.基于差分进化算法的矿震震源谱参数反演[J].有色金属工程,2020,(10):105-111.

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