对钻孔应变仪资料处理方法的研究

Researches on the Method of Processing Bore-Hole Strainometer Data

本文给出了处理钻孔应变仪原始记录资料的一套方法。这套方法包括３个主要步骤：第一个步骤给出了非线性格值改正的方法，使数据得到充分利用；第二个步骤给出了分频段提取信息的方法，有效地剔除了高、低频段的噪声；第三个步骤在固体潮频段内进行了气压相关分析，有效地排除了气压干扰。以河北省滦县地震台ＹＲＹ－Ⅱ型钻孔应变仪记录到的资料为例，用该方法进行了处理，并对每一个中间步骤得到的中间数据进行了固体潮调和分析，从而证实了每一个步骤的有效性，并在最后得到了最好的调和分析结果。本文给出的数据处理方法能大大提高资料中固体潮的信噪比，对从固体潮观测资料中提取地震前兆信息有重要意义。

In this paper, a set of methods of processing original data recorded by bore-hole strainometer is given, involving three main steps. In the first step, a full use of the data is made through nonlinear grid-value correction with a new method; In the second, a method is given which is used for extracting information by dividing the data into different bands,and then, the high and low frequency noises can efficiently be got rid of; The third, with the correlation analysis between the air pressure and the strainometer data both in the earth-tide-band components, can be used to wipe the interference from air pressure. As an example, the data recorded from YRY-Ⅱ bore-hole strainometer at Luanxian seismostation, Hebei province, have been processed by using the methods, and with the earth tide analysis after each step, their efficiencies have been shown and the best earth tide analysis results have been given finally.The data processing methods given in this paper can greatly raise the signal-to-noise ratio of the tide data, which have great significance for extracting earthquake precursors from earth tide data.