广西南丹大厂矿区地震活动特征分析  

Characteristics of Seismic Activity in the Dachang Mining Area in Guangxi Region

作　　者：姚宏 郭培兰 龙政强 牟剑英 张华 

机构地区：[1]广西壮族自治区地震局,广西南宁530022

出　　处：《地震》2011年第3期112-120,共9页Earthquake

基　　金：国家科技支撑项目(2008BAC38B02-01-02)资助

摘　　要：本文收集了2009年12月至2010年4月广西南丹大厂矿区地震监测台网记录到的421次ML≥0.5可定位地震事件(含爆破)时空分布情况,从实际调查和波形特征分析排除爆破记录后,研究震级较大的几次矿震震源机制解,按小时段统计爆破频次与能量释放关系。结果表明,矿震断裂走向与区域构造较为一致。矿山地下开采量增加以及之前出现的近半年历史上罕见的干旱气象因素,在震级较大的人工爆破触发下,影响了局部构造应力场的稳定性,由此引发了一系列矿震。This paper has collected the temporal and spatial distribution of 421 locatable events including blasting above the level of ML-0.5 from December 2009 to April 2010 by the Dachang mining seismic monitoring network.Base on investigation and analysis of waveform characteristics excluding blasting,this paper studied focal mechanism solutions of the larger magnitude mine earthquakes,as well as the relationship between energy release and frequency statistics of hourly blasting.The result shows that the fault strike is consistent with regional tectonics.Associated with the increasing exploitation quantity of underground mining and the prior rare arid lasting about half an year,the artificial blasting of larger magnitude affected the local stability of tectonic stress field which caused a series of rock-bursts.

关 键 词：矿山地震 震源机制 成因分析 广西大厂 

分 类 号：P315[天文地球—地震学]