青岛钻孔体应变短时畸变分析  

Study on the short time distortion anomaly of borehole volume strain in Qingdao

作　　者：冯志军[1] 赵金花[1] 荆强[1] 陈安范 殷海涛[1] 李杰[1] 

机构地区：[1]山东省地震局,山东济南250014 [2]山东安丘市兴安街道农业服务中心,山东安丘262100

出　　处：《山西地震》2009年第4期40-45,共6页Earthquake Research in Shanxi

基　　金："十一五"科技支撑项目(2006BAC01B03-03-04);2007年山东省地震局合同制项目资助

摘　　要：在分析青岛钻孔体应变干扰的基础上,对青岛钻孔体应变出现的短时畸变进行了统计分析。结果表明,青岛钻孔体应变短时畸变可能是钻孔岩壁岩块掉落引起的张性异常,不是地震前兆异常;短时畸变与气压短时突变波动引起的信号均包含有2 m in^5 m in周期信号,比正常时多了5 m in的周期信号,两者的高频信号幅值相同,约为正常的1.5倍;气压的短时突变可引起青岛体应变观测出现固体潮同步波动畸变和曲线加粗变化。Statistically analyzes the short time distortion anomalies of borehole volume strain in Qingdao based on analyzing the interference. Results show that these distortion anomalies are probably tensional anomalies caused by dropping rocks from the well- face rather than precursory anomalies. The signal caused by the short time distortion anomaly and pressure fluctuation include 2-5 minutes period, and 5 minutes more than normal signal, and the same high-frequency amplitude of them were about 1.5 times than normal. The short time mutation of pressure cause solid tide synchronal distortion and curve change thicker in Qingdao volume strain observation.

关 键 词：青岛 钻孔体应变 干扰 畸变 

分 类 号：P315.2[天文地球—地震学]