岩石微观胶结模型及离散元数值仿真方法初探_蒋明镜

1、Vol 32 No.lJan. 20133220131收稿日期i 2012 05 21修回日期I 基金項目, 作者简介：(1965 )2012 07 16(973)(20UCB013504)19S5(51025932)Chinese Joimial of Rock Mechanics and Engineering岩石微观胶结模型及离散元数值仿真方法初探1 2 1 2 1 2(1.200092 2.200092)摘要：PFC20关键词：中图分类号：TU45文猷标识码：A文章编号：1000 69155JJPFC附昨的咛Y盘法向接触模型Busaidiparallel-bondcontact bon

2、dN. Cho I8DEME.Christian P PFCDEMPFCcontact-bondparallel-bond分离器胶结尤*： jj e少冷胶絡元UM2Fig. 1 Microxopic bond contact model111121 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 16 2013 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 1

3、6 2013PFC2(a)103R,2(b)1Mohi-Coulomb心 2(c)PFC2152胶结模型的建立2.1模型简介(H 123 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 2UM2Fig.2 Mechanical responses of bond contact model111121/?t =0.21r +0.7834Fig 4 Relationship between tensLon strength and bondthicknessFig 3 Ideal

4、ized model of bonded granules1131 JAO(1)0.783 11732 12mm50 nun 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L82013 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L82013 1994-2013 China Academic Journal Electronic Publishing Ho

5、use. All rights reserved, L82013Fig 5 Shear strength ratio between epoxy resin and cement under different normal forces7Fig 7 Shear strength envelop of cement bond contact modelwith zero bond thickness 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L82013 1994-201

6、3 China Academic Journal Electronic Publishing House. All rights reserved, L82013kN 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L82013Fig 6 Toraoa strengtli rauo benveen epoxy resin and cement8Fig 8 Torson strength envelop of cement bond contact modelwith zero

7、bond thickness 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L82013undei different noimal forces2（ 】）厂 F 、厶kNkN/(N m)01602 22 556 933 439 56 505 665 343 911.238 099 163 519 65S91215.7B532 470 2Table 1 Shear and torsion strengthes of cement bond granules with zero

8、 bond thickness1.602 2 kN2.536 9 Nf= 1.602 20R：0m R= 0.783 kN & g, fTg = 0.132 87 =0.167 92 fT= 1.52 705 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L82013 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, L820133离散元胶结模型的验证3.1岩石

9、试样的制备 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 32 19 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 32 19 156 000100.17 nun0.08 nun0.121 minM. J. Jiang980.2180.2170.2160.214 0.212 0.2080.2040.20Ua丿Fig 9 Particle size distr

10、ibution curve of granite rock sample1抽丿10%529 kPa02170.2B 0 209 0 205 0 2010.1970 1930丄S9 0 1850.1S10 0000.0050.01010Fig 10 Granite rock sample and its initial void rauodistnbution3C. D. Martin u203.2岩石压缩试验离散元模型验证W F. Brace(nP. Tapponmer5(11)(3)W F. BraceR230%50% (4)70%80%70%/幅m )e *(N m J)砒Nm l)b(N

11、 m )怎(N m l)& N/(N m丿p2 7000.21 44x10J,9 6xlOJO7.2xioJO4.Sxl0JC25xl044310；S.OxlO4112Table 2 Matenal parameters of rock sample 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 202013 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 2

12、02013Fig. 11 Stiess-stiam curve for ginnite obtained expenmenrally1211iso 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 202013Fig 12 Axial stress-axial strain curves observed m numencal and experimental uniaxial coinpression tests 1994-2013 China Academic Journal

13、 Electronic Publishing House. All rights reserved, 202013D. 0. Potvondv p 73JJm/s0.0021 000C. ThomtoQ2513 DEMFig 13 Relauonship curve benveen axial stress and bond broken nuinbei obseived in DEM numencal tests12C. D. Mama ll92050 MPa130 MPa0 50 MPa50 MPa(32.7%q丿50130 MPa(85%q)3130 MPa13 1994-2013 Ch

14、ina Academic Journal Electronic Publishing House. All rights reserved, 3221 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 URUnd erground Research Labomtonj 1994-2013 Chin

15、a Academic Journal Electronic Publishing House. All rights reserved, 3221 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 C. D. Martin【亠”】15NPaDEM6.258163DEMTable 3 Results of bboratory testsand DEM numericalsmiulationMPa0 MPa 2 MPa 4 MPa/ MPa4 )GPa【叼1501S5220

16、1S6962.1750 000.14015220S21817.7164.1553 900 162 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 DEM(b) DEM3.3岩石拉伸试验离散元模型验证URL10106.93 MPa.】DEM14(a)14(b)0.2828 imn15 DEMFig

17、 15 Stress-strain curve obtained from DEM direct tenaontest 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 3221 DEM16DEMFig 16 Failure patterns of rock samples observed in expe

18、rimental and DEM direct tension testsURL2044.97 mmNPa17Fig 14 DEM rock sample and its aze used for direct tension testmm22 nunPFC19-2021.28 nim8.8wall450.3 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 2220L3 1994-2013 China Academic Journal Electronic Publishing

19、 House. All rights reserved, 2220L3(b) DEM17 DBMFig 17 Sample for Brazilian tests2180.06%8.8MPa DEM8.6 MPa1919DEMFig 19 Failure patterns of rock sample observed inexpenmental and DEM numerical tests4结论 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 2220L3 1994-201

20、3 China Academic Journal Electronic Publishing House. All rights reserved, 2220L3%18Fig 18 Stiess-strain cuives observed in numencal andexpenmental Brazilian tension testsC+pfc2D(2)(4丿2參考文 ltt( References):i19SS 2 6 (LI He YDIGuongzhi XU Jiang etal. Rock fnctuxe mechamcsM. Chongqing Chongqing Umvcit

21、y Press 1988 2 6.(in Chinese)POTYOJOY D O CUNDALL P A LEE C A ModeUmg rock uung 1994-2013 China Academic Journal Electronic Publishing House. All rights reserved, 322316J201133(3) 354 3eO(JIANG2011 57 85 (YANG ShengAnalysis of figure rock50(1) 43 53.MBexjing Science Pressbonded arsembhez of circular

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24、ciences 2011 48(J) 996 10105 BUSAIDI A A HAZZARD J F YOU1JG R P Distinct elementmodeling of hydniuhcally fractured he du bonnet granite J Journal of Geophysical Research 200511O(B(X53O2) 114.PJD.2002(ZHUAKJ NmgPropagation rule of crack rock macc andma the ma tic 二 modelresearch under the seepogp-sti

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26、 uiuxual comprec3ionJ. Granular Matter 201113(4) 341 56410J2011 32(7) 2 199 2 203 (HE Xuwen LIUZhong LIAO Boo et al Stability aiialycxz of jointed rock slopes bared on discrete element methodJ Rock and Soil Mechanics 2011 32(7) 2 199 2 203 (m Chinese)10 JIANG MJ YU H S HARRIS D Bond rolling resistan

27、ce and its effect on yielding of bonded grnnvlatec by DEM analycesJJ. International Journal for Mumerical and Analytical Methode in Geomechamcc 200(5 3(8) 723 761.11 JIANG MJ YUHS LEROUEIL S A simple and efficient approach to captunng bonding effect in naturally nucro-ctmctured candz by discrete ele

28、ment method J International Journal for )himencal and Analytical Methods m Engmeenng 2007 69(6) 1 15S 1 193.12 JIANG M J SUH Y G LI L Q et al. Contact behavior of idealizedgranules bonded in different interparticle dictancez an experimcnQl mvrstigauoAJ Mechanics and Matenals 2012 55(1) 11513 JIANG M

29、 J SUJJ YG XIAO Y An experimental investigation on the contact behavior between cemented granules J. Geotechnical and Tezhng Journal 2012 35(5) 67S 69014 J2011 32(1)309 315.(JIA1JG Mingjmg SUH 畑昭bonded granule二J Rock and Soil Mechamcc 201132(1) 309315-(山 Chmece)Ming/ng SUIT Yugang LI Liqing &perHnen

30、tal study on micro-mechamcal model for two different bonded granules under complex stress conditio ns J Chine zc Journal of Geotechnical Engixxenng 201133(3丿 354 360 (in Chinese)(17J2013( ”JIA】K5 Mrngjmg ZHOUYapngCHE1I He Experimental analyses of effect of different bond thicknecs oa panuneterz in nucro-xnechaiucal model of bonded granule二J Rock and Soil Mechamcs 2013(10 be prezzed) (m Chinese)IS JIANG MJ KONRAD J M LEROUEIL