浅钻孔安装应变仪的试验

钻孔应变仪探头与钻孔用膨胀水泥固封,探头损坏后钻孔不能再使用,这样给监测工作造成了很大的经济损失.如何充分利用台站山洞资源,进行浅钻孔应变仪的安装,是值得研究的课题.在井深1.96m的浅钻孔内安装形应变仪的试验取得了很好的结果,经与徐州地震台山洞内的体应变、振弦仪和伸缩仪同期观测资料的对比,发现仪器安装在山洞里,采用电瓶供电方法,可以大大减少或避免雷害的影响.

EXPERIMENTS OF SHALLOW DRILLING FOR INSTALLATION OF STRAIN APPARATUS

As the drill holes and the probe with the borehole strain instruments are sealed with expansive cement solid,the drill holes can not be used when the probe damaged,this brings great economic losses to our monitoring take,so some idea of making full use of the cave resources of the station to install the shallow borehole strain instruments occures.In this way,we can save the high drilling costs,take a great convenience of instrument maintenance and probe replacement,at the same time,it has positive significance of develop earthquake emergency response and imminent follow-up observations.The research on "Experiments of shallow drilling to install the deformation apparatus and the strain apparatus" in depth of 1.96 meters at Xuzhou seismic Station by Institute of Crustal Dynamics,China Earthquake Administration and Henan Earthquake Administration has already achieved good results that we have reached the intended purpose by comparing the same period of observational data that belongs to the volume strain,the vibrating wire instrument and the telescopic instrument those who installed in the cave of Xuzhou seismic station.While the instruments are installed in the cave,if we take the battery-power and charge it avoid the thunderstorm period,we can also greatly reduce or avoid the impact of lightning disaster.