Mesomechanicsanalysisofstaticcompressivestrengthanddynamic

compressivestrengthofwater-saturatedrockunderuniaxialload

WANG Bin; LI Xi-bing

doi:10.11883/1001-1455(2012)04-0423-09

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WANG Bin, LI Xi-bing. Mesomechanicsanalysisofstaticcompressivestrengthanddynamiccompressivestrengthofwater-saturatedrockunderuniaxialload[J]. Explosion And Shock Waves, 2012, 32(4): 423-431. doi: 10.11883/1001-1455(2012)04-0423-09

Citation:

WANG Bin, LI Xi-bing. Mesomechanicsanalysisofstaticcompressivestrengthanddynamic compressivestrengthofwater-saturatedrockunderuniaxialload[J]. Explosion And Shock Waves, 2012, 32(4): 423-431. doi: 10.11883/1001-1455(2012)04-0423-09

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Mesomechanicsanalysisofstaticcompressivestrengthanddynamic compressivestrengthofwater-saturatedrockunderuniaxialload

doi: 10.11883/1001-1455(2012)04-0423-09

1.
SchoolofEnergyandSafetyEngineering,HunanUniversityofScience
2.
andTechnology,Xiangtan411201,Hunan,China;
3.
SchoolofResourcesandSafetyEngineering,CentralSouthUniversity,

Funds:

NationalNaturalScienceFoundationofChina(50974059,50934006)

NationalBasicResearchProgramofChina(973Program)(2010CB732004)

More Information

Corresponding author: WANG Bin
Publish Date: 2012-07-25

Abstract

Abstract

Dynamicmechanicalpropertiesofwater-saturatedrockunderuniaxialloadarehighlydifferentfromitsstaticmechanicalproperties, thereasonsofwhichcannotbeexplainedwellbasedon macro-mechanics.Accordingtomeso-mechanismofrockcompletestress-straincurveunderuniaxial compression,crackpropagationofwater-saturatedrockinfluencedbyporewaterunderdynamicload isanalyzedaswellasunderstaticload.Wheninitialfracturesaresubjectedtostaticuniaxialcompressionload, itcancausefreewatertoappearporewaterpressure,whichcanpromotetheexpansionof wingedcrackduetoitsextrudingwingedcrackoutwards.Intheconditionofdynamicuniaxialcompressionloads, freewaterappearcohesiveforcetohinderthepropagationofwingedcrack.Basedon compressivewingcrackpropagationmechanism,calculationformulasofstaticcompressivestrength anddynamiccompressivestrengthwithwaterunderuniaxialloadareobtained.Withthesamefracturetoughness, staticcompressivestrengthofwater-saturatedrockisevenlowerthanthatofdry rock.Bothofthemarelowerthandynamiccompressivestrengthofwater-saturatedrock.Staticand impactcompressiveexperimentsonair-driedandwater-saturatedsandstoneareconducted,theexperimentresultsareinagreementwiththeonesfromtheoreticalmodels.
- solidmechanics,
- dynamiccompressivestrength,
- mesomechanics,
- water-saturatedrock,
- crackpropagation