学科分类
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1 个结果
  • 简介:Basedontheprincipleformulaforthefour-componentstrainmeters,wecandirectlyobtainthespecificplanestrain,shearstrainandazimuthalangleoftheprincipalstrain,andthemaximumandminimumprincipalstrainscalculatedafterwardsaretheindirectresult.TheproblemsofpracticalityofthesensitivitycoefficientsAandBofplanestrainandshearstrainarethendiscussed.Basedonthisidea,weanalyzedtheobservationdataofseveralfourcomponentboreholestrainmetersneartheepicenteroftheYiliangMS5.7earthquakein2012andtheLudianMS6.5earthquakein2014intheZhaotongarea,YunnanProvince.Theresultsshowthattheanalysisbasedontheperspectiveofplanestrainandshearstrainhasanobviouslybettereffectthanthatbasedonthecomponentreadings,andcandirectlypeelofftherespectiveabnormalityoftheplanestrainandshearstrain.Inaddition,thecorrelationcoefficientcurvesbetweenmeasureddataoftwoplanestrainsshowsignificantanomalieswhichoftenoccurseveraldaysbeforeandduringtheearthquake.

  • 标签: Four-component borehole strainmeter Ludian MS6. 5