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75—1型简易地应力仪是目前群测点广泛使用的一种测报手段.78年至今,我们在定时连续观测的基础上,发现应力测值受地温、降水、地下水等因素的影响.我们用数理统计的方法对地温、降水的影响作了分析研究,定量排除干扰,以提取地震信息.介质含水量对应力测值的影响介质含水量包括大气降水和地下水位两种成份.含水量的干扰在应力实测中较为常见.例如:每年4—5月份土应力测值开始上升,6—8月份伴随降水过程,应力测值出现起伏变化(图1).雨
75-1 type simple stress meter is widely used as a measuring method at the group measuring point.We have found that stress measurement is affected by ground temperature, precipitation, ground water and other factors on the basis of timed continuous observation The effects of soil moisture and temperature on the ground temperature and precipitation were analyzed by mathematical statistics, and the interference was quantitatively excluded to extract the seismic information.The effect of medium moisture content on the stress measurement The medium moisture content includes two components, atmospheric precipitation and groundwater level. For example, the soil stress measurement starts to increase from April to May each year, and the fluctuation of stress measurement changes with the precipitation process from June to August (Figure 1). Rain