摘要
长河坝水电站位于四川省甘孜藏族自治州康定县境内。库区附近地质构造复杂,断裂带纵横交错,水库位于高山峡谷地区。为了分析水库蓄水前库区地震活动的时空分布,建立了一个临时地震观测台网,该台网利用CDMA通信方式将数据实时传输回中心。后利用地震监测台网建成后8个月的地震目录进行了地震活动性分析,分析后认为长河坝水库大坝和猴子岩水库大坝附近记录的事件大部分为施工爆破所致,去除疑似爆破后的人为地震事件后,天然地震主要分布在鲜水河断裂及其东北侧的次级小型断裂上,地震活动性指标b值为0.72,与川滇平均水平值相当。
The Changheba Hydropower Station is located in Kangding County, Ganzi Tibetan Autonomous Prefec-ture ,Sichuan Province. Considering the complex geological structure and the crisscrossed fault belts near the high mountain canyon area, a temporary network was set up. This temporary network adapts the CDMA communication mode to transmit data back to the center, which is different from the previous temporary network. Then the spatial and temporal distribution characteristics of seismic activity are analyzed based on the 8 months earthquake cata-logue. The earthquake events in the vicinity of the Changheba reservoir and the Houziyan reservoir are supposed to be caused by some of great blasting. Removing the section of suspected blasting, earthquakes are mainly distributed along the Xianshuihe fault and the northeast side of the secondary small faults. And the b - value of seismic activity is 0.72, as equals to the average equivalent of Sichuan - Yunnan region.
出处
《四川地震》
2016年第4期10-14,共5页
Earthquake Research in Sichuan
关键词
长河坝
临时地震监测台网
监测能力
地震丛集
震中分布
Changheba
temporary monitoring station
monitoring capability
clustering of earthquake
epicenter distribution
