摘要
抽水蓄能电站地下洞室超前地质预报探测方法主要为地质雷达法,该方法探测距离短,探测时间长。为提高地下洞室地质预报工作效率,准确掌握掌子面前方信息,安徽桐城抽水蓄能电站选取两个试验段,采用探测距离长、探测范围广、探测时间短的瞬变电磁法进行地下洞室超前地质预报。通过瞬变电磁法探测结果与地质素描结果对比分析,试验结果表明瞬变电磁法探测结果与地质雷达法、地质素描结果基本一致,且探测范围更广,探测精度也较高,为地下洞室开挖争取了更多的时间。
Ground penetrating radar(GPR)is the main method for detecting underground cavern in pumped storage power station. The detection distance is short and the detection time is long. In order to improve the efficiency of underground cavern geological prediction and accurately grasp the information in front of the tunnel face,two test sections were selected for Tongcheng pumped-storage power station in Anhui Province. The transient electromagnetic method(TEM)with long detection distance,wide detection range and short detection time is used for the geological prediction of underground caverns. Through the comparison and analysis of the transient electromagnetic method and geological sketch results,the experimental results show that the transient magnetic method detection results are basically consistent with the geological radar,geological sketch. And the detection range is wider,the detection precision is also higher,for the underground cavern excavation for more time.
作者
吴强
郭佑国
晏凯
WU Qiang;GUO Youguo;YAN Kai(Anhui Tongcheng Pumped Storage Power Co.Ltd.,Tongcheng 231400,China)
出处
《水电与抽水蓄能》
2022年第6期37-44,共8页
Hydropower and Pumped Storage
关键词
瞬变电磁
超前地质预报
地质雷达
transient electromagnetic
advance geological prediction
ground penetrating radar
