抚顺地区矿震震源参数特征研究  

Characterization of Seismic Source Parameters of Mining Earthquakes in Fushun Area

作　　者：夏彩韵 王喜龙[1] 冯璐 郭晓燕[1] 张思宇 XIA Caiyun;WANG Xilong;FENG Lu;GUO Xiaoyan;ZHANG Siyu(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China;Chaoyang Earthquake Monitoring Center,Liaoning Chaoyang 122000,China)

机构地区：[1]辽宁省地震局,辽宁沈阳110034 [2]朝阳地震监测中心站,辽宁朝阳122000

出　　处：《防灾减灾学报》2025年第1期41-49,共9页Journal of Disaster Prevention And Reduction

基　　金：中国地震局地震科技星火计划项目(XH24005YA,XH23009YA);辽宁省地震局青年科研项目(2022023)。

摘　　要：矿震严重威胁煤炭安全生产,一直是亟待解决的关键问题。通过梳理2009-2021年期间辽宁地震台网的波形资料,基于Brune模型的高频截止模型,将理论震源谱与观测震源谱的最小绝对残差作为目标函数,最终获取了78个矿震的震源参数。在此基础上,对抚顺矿区的矿震类型、不同震源参数间的定标关系,以及应力降的时空特征开展深入的分析讨论。结果显示:(1) High-Cut模型的理论谱对矿震震源谱具有很好的拟合效果。抚顺矿震的拐角频率主要位于2 Hz以下,且震级越大,拐角频率越低,这与矩震级有较好的相关性;(2)计算了抚顺矿区78个矿震的应力降,结果显示绝大多数地震的应力降低于0.1 MPa,相比于中国大陆主要地震活动区的应力降水平(0.1~20 MPa)来说,抚顺矿区应力降水平明显偏低;(3)应力降的空间分布特征显示,虽然矿区整体应力降水平较低,但中部和西南部存在相对较高的差应力降高值区,矿震多发生在其内部和边缘。后续应重点监视跟踪这些较高区域的应力水平,为矿山监测和安全生产提供科学依据。Mining earthquakes have been one of the disasters that need to be urgently solved to seriously threaten coal safety production.In this paper,by combing the waveform data of Liaoning station network from 2009 to 2021,based on the high-frequency cutoff model under Brune model,the minimum absolute residual between the theoretical and observed source spectra is used as the objective function,and the source parameters of 78 earthquakes are finally obtained,and the types of mine earthquakes in the region,the mutual calibration relationships of different source parameters and the spatial and temporal characteristics of stress drop are analyzed and discussed,and the results show that:(1)The theoretical spectrum of the High-Cut model has a good fitting effect on the source spectrum of mining earthquakes,and the inflection frequency of Fushun mining earthquakes is basically below 2 Hz,and the larger the magnitude,the lower the inflection frequency,which has a good correlation with the moment magnitude;(2)The stress drop results of 78 earthquakes in the Fushun mining area calculated in this paper are all below 0.1 MPa,compared with the stress drop levels in major seismic activity areas in China's Mainland;(3)The spatial distribution of stress drop shows that although the overall stress drop level is low,there are relatively high differential stress drop high value areas in the central and southwestern part of the mine area,and earthquakes occur mostly in its interior and edge.scientific basis.

关 键 词：抚顺煤矿 矿震 高频截止模型 震源参数 

分 类 号：P315[天文地球—地震学] TD32[天文地球—固体地球物理学]