MHC耦合作用下岩体力学性质研究现状

Research Status of Rock Mechanical Properties under MHC Coupling

随着工程岩体开挖的不断加深,应力(M)-水流(H)-化学(C)耦合作用对岩体的影响越来越大,研究MHC耦合作用下岩体的力学性质具有重要的工程意义。目前,国内外学者对MHC耦合下岩体力学性质研究主要包括试验研究、模型研究和数值方法研究3个方面。其中,MHC耦合过程的试验研究方面主要集中在MH、MC两种因素的耦合研究上,而对于M、H、C 3种因素的耦合研究较少;模型研究方面还需要考虑化学反应过程的引入,以及如何用更精准的数学模型表达岩体MHC耦合中的水化学损伤过程;数值方法研究方面还需要在计算参数取值、本构关系选取和化学反应过程与应力水流的融合上进一步完善。

With the deepening of rock excavation, the influences of Mechanical（M）-Hydrological（H）-Chemical（C） coupling effects on rock mass are getting bigger, so it has an important engineering significance for research on rock mechanical properties under the coupling action of MHC. At present, the study on the rock mechanical properties under MHC coupling mainly focuses on three aspects including experimental study, model study and numerical methods study, among which experimental study under MHC coupling process concerns more on the two-factor coupling of MH, MC than the three-factor coupling of M, H, C; model study needs to consider the introduction of chemical reaction process, and how to express the hydro-chemical damage process of MHC coupling with more accurate mathematical model; numerical methods study needs to be further improved in the calculation of parameters, the selection of constitutive relation and the fusion of chemical reaction process with flow stress.