摘要
本文讨论了矿山地震的混合源机制问题，并根据内源矩张量分解的特点提出了一种较合理的点源混合机制以及拟合求解方法。这相当于利用Ｐ波初动振幅进行相对矩张量反演，对于区分双力偶事件和非双力偶事件是有意义的。在简化情况下，对１９８７年发生在门头沟煤矿的１５次事件进行了讨论，发现它们大多属于剪切事件。
Inthispaper,thecombinedmechanismofmining tremorsis discussedand a reasonablecombined point-source mechanism withits solution is proposed in consderation ofdecomposi-tion of interior sOurce' s moment tensor,that means inversionofrelative moment tensor by theuse of first motion amplitudes which is valuable for us to distinguish double-couple events andnon-double- couple events.Fifteen tremors observed in Mentougou Mine in 1987 are studied in simplified way,as aresult most of them are double-couple events.
出处
《西北地震学报》
CSCD
1994年第2期12-22,共11页
Northwestern Seismological Journal
关键词
矿山
地震
震源机制
混合源模型
Combined source
Implosive-shear ratlo
Relative moment tensor
Mining earthquake Institute ofGeophysics,SSB,Beijing,China
