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代县和繁峙2次塌陷地震的机理成因浅析
董春丽1,2, 王卓君1,2, 张娜1,2, 丁学文1,2, 郭丽琴3
1.太原大陆裂谷动力学国家野外科学观测研究站, 太原 030025;2.山西省地震局, 太原 030021;3.山西省朔州市防震减灾中心地震监测站, 山西朔州 036000
摘要:
金属矿山的深部开采易引发冒落型矿震。本文对繁峙和代县两相邻铁矿区相继发生的2次塌陷地震,从其发展到发生的过程特点、形态特征和成因机理等方面进行了分析和总结,认为这两次塌陷的孕育发生与区域构造应力、降雨和人为开采等因素密切相关。2次塌陷前前兆特征现象明显,据此可充分利用测震台网记录到的塌陷数据,通过甄别,收集更多的震例,研究总结其规律,并将研究成果应用于日常监测中,以便能对较大矿震事件做到尽早预报预警,更好地服务社会,服务应急等相关部门。
关键词:  采空区  矿震监测  塌陷机理  前兆特征  预测预报
DOI:
分类号:P315
基金项目:
Mechanism and Cause of Two Collapsed Earthquakes in Daixian and Fanshi,Northeast of Shanxi Province
Dong Chunli1,2, Wang Zhuojun1,2, Zhang Na1,2, Ding Xuewen1,2, Guo Liqin3
1.National Continental Rift Valley Dynamics Observatory of Taiyuan, Taiyuan 030025, China;2.Shanxi Earthquake Agency, Taiyuan 030021, China;3.Seismic Station of Shuozhou Earthquake Hazard Prevention Center, Shuozhou 036000, Shanxi, China
Abstract:
Deep mining in metal mines is likely to cause cave-in type mining tremor. In this paper we analyze and summarize the process characteristics,morphological characteristics and genetic mechanism of two collapsed earthquakes that occurred in two adjacent iron mining areas of Fanshi and Daixian. It is believed that the generation of these two earthquakes is closely related to the factors such as structural stress,rainfall and artificial mining around the area. The precursor characteristics of the two collapses are clear so that we can make full use of the collapsed data recorded by seismic monitoring network,to screen and collect more earthquake cases. By further studying of the relation between collapse and induced earthquake,we will be able to forecast mining tremor events in time,in order to serve emergency departments and our society better.
Key words:  Goaf  Mine seismic monitoring  Collapse mechanism  Precursor characteristics  Forecast