井水位气压系数正负动态变化分析

摘要

针对气压作用下井水位动态变化的不同类型（显著型、隐蔽型和中间型），假设最终采用一元线性回归得到相应的井水位气压系数。分析结果表明，气压系数存在正负变化，主要和引起井水位升降变化的非构造应力与构造应力因素等有关。在实际跟踪分析气压系数动态变化过程中，可将其取绝对值。当气压系数绝对值过大或过小时，首先排除井水位受非构造应力因素的影响，否则可能与构造应力变化有关，简单地将气压系数的一些高值和负异常认定为地震异常是不严谨的。%According to the different types (explicit type, implicit type and middle type) of dynamic change of well water level under the action of the air pressure, the barometric coefficient of well water level is obtained by use of linear regression method. The analysis results show that the barometric coefifcient, positive and negative changes are relevant to non-tectonic stress and tectonic stress factors that caused the change of well water level etc. In the actual tracking analysis of barometric coefficient dynamic change process, absolute value of barometric coefficient is indispensable. When the barometric coefifcient absolute value is too large or too small, ifrst of all to exclude well water level is affected by non tectonic stress factors. If after excluding barometric coefifcient absolute value is too large or too small all the same, which may be related to tectonic stress change, this is our most concern. Some high value and negative anomaly of the barometric coefifcients is identiifed by some authors as the seismic anomaly that is not precise.