一种弦频式钻孔应变仪
A STRING-FREQUENCY BORE-HOLE STRAIN METER
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摘要: 本文给出3ZX——79型弦频式钻孔应变仪的性能及主要指标.其灵敏度,日稳定度、内符合精度均已达到10-9.从两年多来的连续实测资料表明,所测到的日应变固体潮大潮幅度在4——510-8;小潮幅度在2——310-8.地球表层年应变幅为10-6数量级;震前地壳应变前兆信息在10-7数量级上.从而表明:采用我国自己研制的高精度钻孔应变仪,为地球科学各项主要参数的测量研究、探索地震预报,提供了一种可能.Abstract: The specifications of the ZX-79 string-frequency borehole strain meter are given in this paper. Its sensitivity, daily stability and coincidence accuracy are all as high as 10-9. The data observed continuously during the past two years show that the daily variations of the tidal strain due to strong and weak tide are 4-510-8 and 2-310-8 respectively. The annual variation of the strain at the surface of the earth is of order of 10-6, and the anomalous variation of the strain in the crust before an earthquake is above 10-7 order. Therefore, it would offer us a possible way to employ the sensitive borehole strain meters developed in our country for the measurement of physical parameters in earth science and earthquake prediction.
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[1] 柯波,日本东海大震预报,地震战线,3, 1980.
[2] N.哈斯特,矿井岩石压力的侧是方法,岩石和地壳的应力侧量,1——14,地质出版社,1980.
[3] 潘立宙,地应力与地应变的定向测量,力学与实践.1, 20——26, 1980.
[4] L. A. Latynina等,强震前地壳应变变化的某些异常,Tectonophysics, 9, 2——3, 239, 1970.
[5] M. V. Gzovsky等,关于地壳应力、形变、破裂和形变机制的地壳构造物理特性问题,国外地震,5, 41,1977.
[6] 北京大学地球物理系、武汉、侧绘学院大地系、中国科技大学地球物理系合编,重力与固体潮教程,1811——1812,1980.
[7] C. Beaumont,地震预报:膨胀引起的地球固休潮倾斜和应变的变异,国外地震,6, 44——47, 1977.[1] 柯波,日本东海大震预报,地震战线,3, 1980.
[2] N.哈斯特,矿井岩石压力的侧是方法,岩石和地壳的应力侧量,1——14,地质出版社,1980.
[3] 潘立宙,地应力与地应变的定向测量,力学与实践.1, 20——26, 1980.
[4] L. A. Latynina等,强震前地壳应变变化的某些异常,Tectonophysics, 9, 2——3, 239, 1970.
[5] M. V. Gzovsky等,关于地壳应力、形变、破裂和形变机制的地壳构造物理特性问题,国外地震,5, 41,1977.
[6] 北京大学地球物理系、武汉、侧绘学院大地系、中国科技大学地球物理系合编,重力与固体潮教程,1811——1812,1980.
[7] C. Beaumont,地震预报:膨胀引起的地球固休潮倾斜和应变的变异,国外地震,6, 44——47, 1977.
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