人 民 长 江 2015生 eefel C I,Lichtner P C.Dilfusion and reaction in a rock matrix bor。 [5] Stsealing and preferential opening[J].Int.J.Rock Mech.Min.Sci., 2006,(43):23—36. ias B P,Hajash A.Change in qua ̄z solubility and porosity change [1O] Eldue to effective stress:An experimental investigation of pressure solu— dering a hyperalkaline fluid—filled fracture[J].Geochem.Cosmo- ehim.Acta,1994,(58):3595—3612. [6] Dreybrodt W,Buhmann D.A mass transfer model for dissolution and precipitation of calcite from solutions in turbulent motion[J】.Chem Geol,1991,(90):107—22. tinn(J].Geology,1992,(20):451—454. Capasso G.The influence of normal load on the hydraulic behavior of [7] Yasuhara H,Elsworth D,Polak A.The evolution of permeability in a rock fractures[c]//The 9th international congress on rock mechan— ics.Rotterdam:Balkama.1999. natural fracture:the signiifcant role of pressure solution[J].Journal of Geophysical,2004. [12] 胡云进,钱锐,速宝玉.一种确定裂隙非饱和水力参数的数值 模拟法[J].岩土工程学报,2001,23(3):284—287. nc.Introduction to Comsol Multiphysics[M].744 Cowper [13] COMSOL IStreet Palo Alto,CA 94301.USA.2013. [8] Yasuhara H,Elsworth D,Polak A.A mechanistic model for compac— tion of granular aggregates moderated by pressure solution.[J].J. Geophys Res.,2003. u J,Sheng J,Polak A,et a1.A fully coupled HMC model for fracture [9] Li(编辑:郑毅) Numerical simulation of fluid—.mechanical—-thermal——chemical coupling effect in single fractured rock mass TIAN Xiaodan .JIANG Xianzhen (1.Department ofHydraulic Engineering,Wentian College,Hohai University,Ma anshan,243000,China;2.Department of Geotechnical Engineering。Nanjing Hydraulic Research Institute,Na ng 210024,China) Abstract:To study the change of permeability of the rock fissure under influences of coupling effects of seepage,stress, chemistry and temperature.a full coupled hydraulic—mechanical—chemical—thermal numerical model is established for a single fissure in a rock mass.The model is transferred into a set of differential equations,which are solved by Comsol Muhiphysics. It avoids the errors in other loose coupling algorithms and the result is closer to the reality.Two examples are employed to analyze the variation law of permeability of the single rock fissure under the complex coupling of seepage,compression,hydro—mechani— ca1 corrosion and thermal effects.the main influential factors and mechanism of permeability change in fractured rocks are also re— vealed. Key words: rock fissure;permeability characteristic;multi—filed coupling;numerical simulation ,…】一】一 】…’… …l 一 ・简讯・ 长江防总办公室会商三峡水库库尾减淤调度试验 2015年5月4日,长江防总秘书长、长江委副主任魏山忠 m左右。截至5月4日8时,长江上游主要水库待消落水量合 主持召开会商会,听取了近期流域水雨情、汛情灾情以及上游 水库群水位消落、三峡水库库尾河段冲淤、库尾减淤调度试验 准备工作等情况汇报,研究部署了三峡水库库尾减淤调度试验 事宜。 计约126.8亿m ,其中,三峡水库待消落水量94.61亿m ,其他 重要水库约32.19亿m 。 目前,三峡水库水位为160.57 m,寸滩站流量在6 500 In /s 左右波动,符合三峡水库库尾减淤调度试验条件。长江防总办 4月下旬,长江流域降水偏少3成多,其中,长江上游偏多 近2成,中下游偏少6成多。受上游水库群集中消落影响,4月 份,长江中下游主要控制站月平均水位较历史同期偏高,其中 汉口以上河段偏高1.2 m左右,汉口以下各主要控制站偏高0.6 公室会商决定于5月4日起开展三峡水库库尾减淤调度试验, 水库水位按每天0.5 m左右消落,持续10 d时间。试验期间, 中国长江三峡集团公司将组织有关单位做好试验监测。 (长江)