论文部分内容阅读
震前井孔水位异常的报道,国内外已屡见不鲜,本文介绍的是1984年11月北京塔院井捕捉到的一组典型的异常实例,包括水位的趋势异常,水位与气压的正相关异常、短临突降及水位固体潮畸变等。 塔院井位于著名的深大断裂—黄庄—高丽营断裂带的中段,井深361米,观测层为中侏罗系凝灰岩裂隙承压含水层。通过近十年的观测,已查明其正常水位变化的规律,即多年趋势性下降的背景上年变规律清晰,较清楚地记录到水位固体潮、水震波、气压效应及降雨荷载效应等多种地壳应力应变微动态信息。表明,该井井位好,对地壳活动的反映能力较强,已弄清正常动态特征,具有捕捉地震前兆异常信息的可能性和有利条件。
The reports of borehole water level anomalies before the earthquake are not uncommon at home and abroad. This article introduces a group of typical anomalies captured by Beijing Tower courtyard wells in November 1984, including the abnormal trend of water level, the positive correlation between water level and pressure, Short-term sudden drop and water tide and other solid tides. Tanyuan well located in the famous deep fault - Huangzhuang - Gaoliying fault zone in the middle, 361 meters deep, the observation layer of the Jurassic tuff fissure confined aquifer. Through the observation of the past ten years, the regularity of the change of normal water level has been ascertained, that is, the annual variation law is clear on the background of declining trend over many years and more clearly the records of water tide solid tide, water shock wave, barometric pressure effect and rainfall load effect Kind of crustal stress and strain micro-dynamic information. The results show that the well location is good and its ability to reflect the crustal activity is strong. The normal dynamic characteristics have been ascertained, which has the possibility and favorable conditions to capture the anomalous information of the earthquake precursors.