分量式钻孔应变观测的最佳方案  

Optimal Solution for Component-Type Borehole Strain Observation

作　　者：张永庆 赵树贤 邱泽华 唐磊 ZHANG Yongqing;ZHAO Shuxian;QIU Zehua;TANG Lei(National Institute of Natural Hazards,MEM,1 Anningzhuang,Beijing 100085,China)

机构地区：[1]应急管理部国家自然灾害防治研究院,北京市100085

出　　处：《大地测量与地球动力学》2022年第6期650-654,共5页Journal of Geodesy and Geodynamics

基　　金：中央级公益性科研院所基本科研业务费专项(ZDJ2018-17,ZDJ2017-10,ZDJ2012-11);国家自然科学基金(41374051,41974018)。

摘　　要：针对现有四分量钻孔应变仪观测准确性自检不完整的问题,着眼于钻孔应变仪的未来发展,在理论上推导出n≥3分量水平等间隔钻孔应变观测方案的面应变、N向差应变和N向剪应变的一般化公式,并定性评价其准确性自检能力。若仅考虑面应变观测的准确性自检,现有的四分量钻孔应变仪是最佳方案;若考虑观测准确性的全面自检,即同时进行面应变和剪应变的准确性自检,那么六分量是最佳方案。针对六分量方案,给出面应变和剪应变的准确性自检公式。In view of the incompleteness of the existing component-type borehole strainmeters and the future development of borehole strainmeters,we theoretically derive generalized formulas for surface strain,north-directional differential strain,and north-directional shear strain for the n≥3-component horizontally equally spaced borehole strain observation scheme.We qualitatively evaluate their accuracy self-verification capabilities.If only the accuracy self-verification of areal strain observation is considered,the existing four-component borehole strainmeter in China is the best solution;if the comprehensive self-verification of observation accuracy is considered,i.e.,the accuracy self-verification of both areal strain and shear strain,then the six-component is the best solution.For the six-component scheme,we give formulas for accuracy self-verification of areal strain and shear strain.

关 键 词：钻孔应变仪 面应变 剪应变 自检 

分 类 号：P315[天文地球—地震学]