LiDejian, QiHao, LiChunxiao, FengJili. Brazilian disc splitting tests and numerical simulations on coal samples containing bedding planes[J]. Journal of Mining Science and Technology, 2020, 5(2): 150-159.
| Citation:
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LiDejian, QiHao, LiChunxiao, FengJili. Brazilian disc splitting tests and numerical simulations on coal samples containing bedding planes[J]. Journal of Mining Science and Technology, 2020, 5(2): 150-159.
|
LiDejian, QiHao, LiChunxiao, FengJili. Brazilian disc splitting tests and numerical simulations on coal samples containing bedding planes[J]. Journal of Mining Science and Technology, 2020, 5(2): 150-159.
| Citation:
|
LiDejian, QiHao, LiChunxiao, FengJili. Brazilian disc splitting tests and numerical simulations on coal samples containing bedding planes[J]. Journal of Mining Science and Technology, 2020, 5(2): 150-159.
|
Brazilian disc splitting tests and numerical simulations on coal samples containing bedding planes
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StateKeyLaboratoryforGeoMechanicsandDeepUndergroundEngineering,Beijing100083,China; 2.SchoolofMechanicsandCivilEngineering,ChinaUniversityofMining&Technology-Beijing,Beijing100083,China
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Abstract
Inthispaper,Braziliandiscsplittingtestsoncoalrockspecimenswithbeddingplanesand correspondingsimulationsbycombinedfinite/discretenumericalmethod(FDEM)werecarriedout.The resultsshowthattheangleofbeddingplanehaveasignificantinfluenceonfracturepatternandtensile strengthofcoal.Itisclearthatastheangleofweakplaneincreases,thefracturepatternofmodelscan beclassifiedintofourtypes,includingstretchingfailureperpendiculartoweakbeddingplanes,complicatedsketchingandshearmixedpattern,shearfailurealongthebeddingplanes,andsketchingdamage alongweakbeddingplanes.Asforthedifferenceoftensilestrengthvalues,itisobservedthatwhenthe loadisperpendiculartothebeddingplane,theeffectofbeddingstructureoncalculatingtensilestrength isnegligibleandthetensilestrengthvaluedecreaseswiththeanglerisinguptotheminimumvalueas anglereachesvertical.Inaddition,withrespecttodissipatedenergyofcoalsamples,itisconcludedthat thedissipatedenergygraduallydecreaseswhentheangleofbeddingplanesareincreased,whichhavea relationshipwithvariedfracturepatternsandstrengthvalues.
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