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时间:2020-04-21
《表面形貌对岩石摩擦滑动本构参数影响研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第8期岩石力学与工程学报Vbl-32No.82013年8月ChineseJournalofRockMechanicsandEngineeringAug.,2013表面形貌对岩石摩擦滑动本构参数影响研究韩文梅,康天合,李建军(1中北大学理学院,山西太原030051;2.太原理工大学采矿工艺研究所,山西太原030024)摘要:对典型岩石摩擦滑动试验装置进行改进,以千枚岩、石英岩、石英砂岩、岩屑砂岩、大理岩、石灰岩、鲕状石灰岩和白云质灰岩等岩样作为研究对象,以其抛光面作为摩擦滑动面,从本构参数的
2、角度出发,研究自然、饱水和干燥状态下岩石摩擦滑动过程中的稳定性。采用R—D本构模型分析不同状态下岩石的摩擦滑动本构参数,基于岩石抛光表面形貌分析微凸体和分形维数对岩石摩擦滑动本构参数的影响。试验结果表明:在相同抛光条件下,不同岩石滑动表面微凸体的直径均值、高度均值和表面轮廓平均高度不同,随着这3个参数的增加,本构参数均呈线性规律降低;滑动表面形貌越精细分形维数越大,随着分形维数的增加,本构参数呈线性规律增加。关键词:岩石力学;摩擦滑动;本构参数;表面形貌;微凸体;分形维数中图分类号:Tu45文献标
3、识码:A文章编号:1000—6915(2013)08—1632—08INFLUENCEoFSUR’ACEToPoGRAPHYoNCONSTITUTIVEPARAMETERoFRoCKFRICTIoNALSLIDINGHANWenmei,2KANGTianhe。LIJianjun(1·SchoolofScience,NorthUniversityofChina,Taiyuan,Shanxi030051,China:2.InstituteofMiningTechnologyTaiyuanUnivers
4、ityofTechnology,Taiyuan,Shanxi030024,China)Abstract:Thetypicaltestapparatusofrockfrictionslidingwasdesignedandimproved.Thesamplesincludingphyllite,quartzite,quartzsandstone,lithicsandstone,marble,limestone,litelimestoneanddolomiticlimestonewerestudied
5、experimentallyusingtheapparatus.Thepolishedsurfacesofthesamplesweretakenasthefrictionalslidingsurfaces.Theforce—displacementcurvesoffrictionalslidingforthesampleswereinvestigatedexperimentallyunderthenaturalstate,saturatedstateanddrystate.Thefrictiona
6、lslidingconstitutiveparameterswereanalyzedaccordingtoRuina-Dieterich(R—D)constitutivemodel;andtheinfluenceoftheasperitiesandfractaldimensionsofpolishedsurfacesf0rmesamplesontheconstitutiveparameterwasanalyzed.Thetestresultsrevealthatthethreeparameters
7、whicharethemeandiameteroftheasperity,themeanheightoftheasperityandthemeanheightofthesurfaceprofilearediferentfordiferentrocksunderthesamepolishingcondition.Asforthemeandiameteroftheasperity,themeanheightoftheasperityandthemeanheightofthesurfaceprofile
8、increase,theconstitutiveparametersaredecreasedwiththelinearlaw.Thesurfacetopographyoftheslidingsurfacefiner,fractaldimensionislarger.Theconstitutiveparametersareincreasedwiththelinearlawasfractaldimensionincreases.Keywords:rockmechanics;fricti
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