Analysis on the Disturbances Which Cause Undulately Change in Observation Data of Digital Borehole Volume Strainmeter
详细信息
- 责任者：Lu Shuangling (Taian Fiducial Seismic Station ; Tai’an 271000 ; China) ; Yu Qingmin
- 刊名：Northwestern Seismological Journal
- 出版年：2010
- 卷期：32(2)
- 关键词：应变测量 ; strain measurement ; 地震前兆 ; precursor ; 山东 ; Shandong Province
- 页码：p.186-190
- 图表：3 illus., 1 table, 13 refs.
- 分类号：0500
- issnNo：ISSN1000-0844
- isbnNo：CN62-1048/P
摘要
Based on the systemic analysis on observation data of borehole volume strainmeter with work logs, the disturbances which caused the undulate short abnormal change in digital borehole volume strainmeter observation are analyzed. The result shows that the short undulate changes of borehole volume strain were caused by mainly air pressure, rainfall, water level change, construction and electrical source. These cannot be absolutely eliminated by correlated analysis, so the quantitative analysis should be combined with qualitative analysis for concrete condition. The disturbance extent of these factors is related to the geological condition of borehole. The influences of air pressure rainfall and water level are bigger commonly at the boreholes in which exist shatter belt.