广西南丹大厂矿区地震活动特征分析
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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.
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.
引文
[1]战明国.广西南丹大厂矿区深部开采的安全对策探讨[J].安产生产与监督,2009,(6):7-9.
[2]杨松文,姚宏,陈鑫,等.广西大厂矿区地震台网技术系统设计[J].华南地震,2010,30(2):97-106.
[3]蔡明海,梁婷,吴德成,等.广西大厂矿田花岗岩地球化学特征及其构造环境[J].地质科技情报,2004,23(2):57-62.
[4]陈毓川,黄民智,徐钰,等.大厂锡矿地质[M].北京:地质出版社,1993.
[5]李春平,吴德成,蔡明海.大厂矿田长坡矿床深部区叠瓦状构造控矿特征及找矿前景分析[J].2006,20(6):623-627.
[6]吴淑才,覃子建.浅析贵州矿山地震活动[J].贵州师范大学学报(自然科学版),1993,12(1):49-58.
[7]Benoit B M.The Fractal Geometry of Nature[M].Publisher:W.H.Freenan.1983.
[8]牟剑英,姚宏,张华,等.用小波分析广西大厂矿区矿震与爆破的波谱差异[J].华南地震,2011,待发表.
[9]覃子建,吴淑才.浅议矿山地震灾害特征及其防治对策—以贵州矿山地震为例[J].地震学刊,1993,(2):8-13.
[2]杨松文,姚宏,陈鑫,等.广西大厂矿区地震台网技术系统设计[J].华南地震,2010,30(2):97-106.
[3]蔡明海,梁婷,吴德成,等.广西大厂矿田花岗岩地球化学特征及其构造环境[J].地质科技情报,2004,23(2):57-62.
[4]陈毓川,黄民智,徐钰,等.大厂锡矿地质[M].北京:地质出版社,1993.
[5]李春平,吴德成,蔡明海.大厂矿田长坡矿床深部区叠瓦状构造控矿特征及找矿前景分析[J].2006,20(6):623-627.
[6]吴淑才,覃子建.浅析贵州矿山地震活动[J].贵州师范大学学报(自然科学版),1993,12(1):49-58.
[7]Benoit B M.The Fractal Geometry of Nature[M].Publisher:W.H.Freenan.1983.
[8]牟剑英,姚宏,张华,等.用小波分析广西大厂矿区矿震与爆破的波谱差异[J].华南地震,2011,待发表.
[9]覃子建,吴淑才.浅议矿山地震灾害特征及其防治对策—以贵州矿山地震为例[J].地震学刊,1993,(2):8-13.
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