安徽省TJ-Ⅱ型钻孔体应变观测资料干扰分析

Interference Analysis of Observation Data of TJ-Ⅱ Bore-Hole Body Strain Data in Anhui

对安徽省内同一时间安装,不同地理位置,不同构造条件的5个台站TJ-Ⅱ型钻孔体应变观测资料进行分析,结果表明:5个台站体应变受到的干扰因素存在差异,其中合肥、黄山台体应变受地下水位、降雨、气压影响明显,两台体应变和水位相关程度达到0.85以上,气压相关程度达到0.70以上,降雨干扰系数较大,其中合肥台约为为0.50×10^(-8)/cm。蚌埠台钻孔应变存在严重抽水干扰,产出数据规律不明显;六安台钻孔体应变受水位干扰较小,短周期气压干扰明显,嘉山台仪器安装在无水钻孔内,受降水和水位干扰较小。

The paper analyzed and discussed the observation data of five TJ-Ⅱ bore-hole body strains which were installed at the same time with different geographical locations and tectonic conditions. The results show that the interference factors on five TJ-Ⅱ body strains were different. The observations of Hefei and Huangshan body strain were obviously influenced by underground water, rainfall and atmosphere, and the correlation coefficient of their body strain and water level is more than 0.85. The correlation coefficient of their body strain and the air pressure is more than 0.7 and the interference coefficient of rainfall is larger, of which the Hefeistation is about 0.50×10^-8/cm. The Bengbu station＇s body strain has been severely influenced by the pumping of well near borehole, and the law of output data is not obvious. The body strain of Liuan station is less influenced by water level, and is obviously influenced by air pressure in a short period. The instrument in the Jiashan sation is installed in the borehole without water, so it is less influenced by rainfall and water level.