周广照;彭云晖;许思勇;冉晓军;李平;

• 1:西南石油大学地球科学与技术学院
• 2:中国石油浙江油田分公司
• 3:中国石油测井公司长庆事业部

摘要(Abstract)：

完整岩石强度随非连续界面角度发生变化而变化,因此具有各向异性。修正的Hoek-Brown准则可以对岩石的强度各向异性特征进行合理预测。通过对沉积岩及变质岩两大岩类、共23组岩样单、三轴测试结果进行分析,获取相应强度各向异性参数Kβ及Rc,结果表明:岩石各向异性强弱与原岩类型、压实和胶结等沉积成岩作用、微裂隙发育程度及变质作用等因素有关。对于结构完整的沉积岩石,煤岩的各向异性最强,其次为页岩,而砂岩、泥岩和灰岩的各向异性相对较低。变质岩中板理发育的板岩各向异性最强,片麻岩次之,片岩和大理岩的各向异性相对较低。K_(min)与Rc间满足幂指数关系,K_(90)/K_(min)与Rc间满足线性关系,建立了各向异性岩石K_(min)分类标准。最后利用Londe转换和σcβ预测效果验证了修正的Hoek-Brown准则方程具有较高预测精度,结果可靠,从而为岩石强度各向异性更深入研究提供参考和依据。

关键词(KeyWords)： Hoek-Brown准则;强度各向异性;成岩作用;微裂隙;变质作用;评价

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 周广照;彭云晖;许思勇;冉晓军;李平;

Email:

DOI: 10.19509/j.cnki.dzkq.2017.0238

参考文献(References)：

• [1]Hoek E,Marinos P G,Marinos V P.Characterisation and engineering properties of tectonically undisturbed but lithologically varied sedimentary rock masses[J].Rock Mechanics and Mining Sciences,2005,42:277-285.
• [2]Eberhardt E.The Hoek-Brown Failure Criterion[J].Rock Mech.Rock Eng.,2012,45:981-988.
• [3]Hoek E,Brown E T.The Hoek-Brown failure criterion:A1988Update[J].Canadian Rock Mechanics Symposium,1988(15):31-38.
• [4]Marinos V,Marinos P,Hoek E.The geological strength index:Applications and limitations[J].Bull.Eng.Geol.Environ.,2005,64:55-65.
• [5]Colmenares L B,Zoback M D.A statistical evaluation of intact rock failure criteria constrained by polyaxial test data for five different rocks[J].International Journal of Rock Mechanics and Mining Sciences,2009,39:695-729.
• [6]Jaeger J C.Shear failure of anisotropic rock[J].Geology Magzine,1960,97:65-72.
• [7]Donath F A.Strength variation and deformationalbehavior in anisotropic rock[C]∥Judd W R.State of stress in the Earth’s crust.New York:Elservier,1964.
• [8]Walsh J B,Brace W F.Fracture criterion for brittle anisotropic rocks[J].Journal of Geophysical Research,1964,69(16):34-48.
• [9]Hoek E.Fracture of anisotropic rock[J].Journal of the South African Institute of Mining and Metallurgy,1964(64):501-517.
• [10]Omid S,Rashid G V,Vamegh R et al.A modified empirical criterion for strength of transversely anisotropic rocks with metamorphic origin[J].Bull.Eng.Geol.Environ.,2013,72:257-269.
• [11]Colak K,Unlu T.Effect of transverse anisotropy on the HoekBrown strength parameter‘mi’for intact rocks[J].International Journal of Rock Mechanics and Mining Sciences,2004,41:1045-1052.
• [12]Saroglou H,Tsiambaos G.A modified Hoek-Brown failure criterion for anisotropic intact rock[J].International Journal of Rock Mechanics and Mining Sciences,2008,45:223-234.
• [13]Ramamurthy T.Strength and modulus responses of anisotropic sedimentary rocks,Comprehensive rock engineering[M].Oxford:Pergamon Press,1993.
• [14]Ding W L,Fan T L,Yu B S,et al.Ordovician carbonate reservoir fracture characteristics and fracture distribution forecasting in the Tazhong area of Tarim Basin,Northwest China[J].Journal of Petroleum Science and Engineering,2009,23(5):852-858.
• [15]Donath F.Strength variation and deformational behavior in anisotropic rock[C]∥Judd W R.State of stress in the Earth’s crust.New York:Elsevier,1964.
• [16]王晓雷.软岩层理结构效应实验研究[D].江苏徐州:中国矿业大学,2013:80-90.
• [17]Erling F,Olav-Magner N.The impact of heterogeneity on the anisotropic strength of an outcrop shale[J].Rock Mech.Rock Eng.,2014,47:1603-1611.
• [18]刘运思,傅鹤林,伍毅敏,等.横观各向同性岩石弹性参数及抗压强度的试验研究[J].中南大学学报:自然科学版,2013,44(8):3398-3404.
• [19]张学民.岩石材料各向异性特征及其对隧道围岩稳定性影响研究[D].长沙:中南大学,2007:60-70.
• [20]Mohannad H B,Reza R,Hassan P,et al.A complement to Hoek-Brown failure criterion for strength prediction in anisotropic rock[J].Geomechanics and Engineering,2011(3):61-81.
• [21]闫长斌,徐国元.对Hoek-Brown公式的改进及其工程应用[J].岩石力学与工程学报,2005,24(22):4030-4035.
• [22]Rousseeuw P J.Robust estimation and identifying outliers[C]∥Wadsworth H M.Handbook of statistical method for engineers and scientists.New York:McGraw-Hill,1998.
• [23]Mclamore R,Gray K E.The mechanical behavior of anisotropic sedimentary rocks[J].Journal of Engineering for Industry,1967,89(1):62-72.
• [24]Hoek E,Carranze-Torres C C,Corkum B.Hoek-Brown failure criterion-2002edition[C]∥Proceedings of the North American Rock Mechanics Society Meeting.Toronto,2002:267-272.
• [25]Hoek E,Brown E T.Underground excavations in rock[M].London:The institution of mining and metallurgy,1980:160-165.
• [26]Horino F G,Ellickson M L.A method of estimating strength of rock containing planes of weakness[C].[S.l.]:U.S.Bureau of Mines Report of Investigations,1970:7447-7449.
• [27]Bagheripour M H,Mostyn G R.Prediction of strength of jointed rock:Theory and practice[C]∥Proceedings of ISRM International Symposium(Eurock’96),Torino,Italy[S.l.]:[s.n.],1996:231-238.
• [28]李旭曙.节理岩体卸荷各向异性力学特征试验研究及工程应用[D].武汉:武汉大学,2013:70-77.
• [29]Saroglou H,Marinos P,Tsiambaos G.Application of the HoekBrown failure criterion and the effect of anisotropy on intact rock samples from Athens Schist[J].Journal of the South African Institute of Mining and Metallurgy,2004,104(4):209-215.
• [30]Kwasniewski M A.Mechanicalbehavior of anisotropic rocks[C]∥Hudson J A.Comprehensive rock engineering,Fundamentals.Oxford:Pergamon Press,1993:285-311.
• [31]夏彬伟.深埋隧道层状岩体破坏失稳机理实验研究[D].重庆:重庆大学,2009:3-20.
• [32]Yasar E.Failure and failure theories for anisotropic rocks[C]∥Proceedings of the 17th International Mining Congress and Exhibition of Turkey-IMCET.Ankara:Chamber of Mining Engineers of Turkey:2001.
• [33]Niandou H,Shao J F,Henry J P,et al.Laboratory investigation of the mechanical behavior of Tournemire shale[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(1):3-16.
• [34]Baud P,Wong Tengfong,Zhu Wei.Effect of porosity and crack density on the compressive strength of rocks[J].International Journal of Rock Mechanics and Mining Sciences,2014,67(4):202-211.
• [35]Chang Chandong,Zoback M D,Khaksar A.Empirical relations between rock strength and physical properties in sedimentary rocks[J].Journal of Petroleum Science and Engineering,2006,51:223-237.
• [36]Zhu Wei,Baud P,Wong Tengfong.Micromechanics of cataclastic pore collapse in limestone[J].Journal of Geophysical Research,2010,115:1-17.
• [37]王红岩,万天丰,李景明,等.区域构造热事件对高煤阶煤层气富集的控制[J].地学前缘,2008,15(5):364-368.
• [38]刘洪林,李贵中,王烽,等.沁水盆地煤层割理系统特征及其形成机理[J].天然气工业,2008,28(3):36-39.
• [39]Ding Wenlong,Zhu Dingwei,Cai Junjie,et al.Analysis of the developmental characteristics and major regulating factors of fractures in marine-continental transitional shale-gas reservoirs:A case study of the Carbonifeous-Permian strata in the southeastern Ordos Basin,central China[J].Marine and Petroleum Geology,2013,45:121-133.
• [40]刘树文,杨朋涛,王宗起,等.赣东北婺源-德兴地区新元古代浅变质火山岩的地球化学和锆石U-Pb年龄[J].岩石学报,2013,29(2):581-592.
• [41]李厚民,刘朋军,李立兴,等.辽宁弓长岭铁矿区大理岩地质地球化学特征及其成矿意义[J].岩石学报,2012,28(11):3497-3510.
• [42]肖维民,邓荣贵,付晓敏,等.单轴压缩条件下柱状节理岩体变形和强度各向异性模型试验研究[J].岩石力学与工程学报,2014,33(5):957-963.
• [43]Londe P.Discussion on the determination of the shear stress failure in rock masses[J].ASCEJ.J.Geotech.Eng.Div.,1988,113(3):374-376.