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在计算、统计济阳坳陷区群井水位-气压效率(b)和判定华北断块中强地震 前兆动态的基础上，结合井孔所处断裂构造走向，推算了单井ｂ值响应的构造裂纹应 力、应变特征，并以群井推算结果研究了震前异常场的主应力方向，初步归纳出华北 不同区块中强地震前在济阳坳陷呈现的主压应力方位及不同块区间的演变规律，力 图为地下流体的地震预报增添新方法。
Based on the calculation and statistics of the well water level-pressure efficiency in the Jiyang Depression (b) and the prediction of the precursory dynamics of moderately strong earthquakes in the North China block, the b-value response of the single well Crack stress and strain characteristics. The main stress directions of the anomalous field before the earthquake were studied based on the results of well grouping. The principal compressive stress directions and the different compressive stress directions in Jiyang depression before the moderate strong earthquakes in North China were summarized Evolution law, trying to add new methods for the prediction of underground fluid.