山西及周边地区典型爆破及塌陷震相特征分析  

Characteristics and identifying for typical explosions and collapses in Shanxi and surrounding areas

作　　者：梁永烨 张蕙[1,2] 高伟亮[1,2] Liang Yongye;Zhang Hui;Gao Weiliang(Shanxi Earthquake Agency,Taiyuan 030021,China;National Continental Rift Valley Dynamics Observatory of Taiyuan,Taiyuan 030025,China)

机构地区：[1]山西省地震局,山西太原030021 [2]太原大陆裂谷动力学国家野外科学观测研究站,山西太原030025

出　　处：《山西建筑》2022年第7期27-31,共5页Shanxi Architecture

基　　金：2020年度山西省地震局省局青年项目(项目编号:SBK-2111)。

摘　　要：随着山西数字化台网监测能力的不断提升,近几年积累了丰富的非天然地震事件波形,由于震源性质及其传播路径等差异,使得波形特征不尽相同。选取2009年以来山西台网记录到的M;≥2.5爆破和塌陷事件波形数据,通过对事件的体波和面波波形形态、P波初动方向、A;/A;振幅比、幅频特性等指标进行对比分析得出:爆破A;/A;的值随震中距的增加基本呈现上升状态,而塌陷则呈现下降状态,并在一定震中距后基本保持持平。爆破和塌陷的能量均多集中在低频阶段0 Hz~1.5 Hz、能量衰减较快、频率成分相对简单,但塌陷的高频衰减要比爆破的略大。With the continuous improvement of the monitoring ability of Shanxi Digital Seismic Network,abundant non-natural seismic event waveforms have been accumulated in recent years. Due to the differences in source properties and propagation paths,the waveform characteristics are different. The article analyzed wave data of M;≥2. 5 blasting and collapse events by Shanxi Digital Seismic Network since 2009. Some rules and characteristics of explosions and collapses were summarized,which gained by the seismic phase analysis,P wave touches,amplitude ratio A;/A;and the spectrum analysis of waveforms. With the increase of epicentral distance,A;/A;shows a slow growth trend in explosions,while the trend of collapses,it shows a downward trend firstly and basically remains unchanged. The main frequency of the waveform of explosions and collapses are mainly concentrated in 0 Hz ~ 1. 5 Hz band,but the high-frequency attenuation of collapses is faster than that of explosions.

关 键 词：波形形态 P波初动 A /A 振幅比 幅频特性 

分 类 号：P315.63[天文地球—地震学]