非均质性控制的岩体裂隙溶蚀机制研究综述

A review of research on fracture dissolution mechanism of rock mass controlled by heterogeneity

岩体裂隙作为自然界中渗流-溶蚀过程的介质之一,是自然演变过程中化学风化作用的重要载体。目前学界认同的研究成果主要集中在均质、各向同性条件下的裂隙溶蚀研究中,并不能适用于由裂隙非均质性、各向异性等影响下的溶蚀演化。近四十年,限于真实岩石、岩体裂隙的复杂结构以及渗流-溶蚀过程的微观机制影响,许多非均质性参数对裂隙溶蚀特征的影响仍未取得清楚认知。因此,针对岩体裂隙几何特征非均质性、矿物分布非均质性和裂隙溶蚀模式及判别准则状三方面研究现状进行了分析阐述,并探讨了非均质性对自然裂隙溶蚀演化过程中存在的关键问题,分析了岩体裂隙溶蚀今后的研究趋势,并做出了研究展望。

Rock fractures,integral to the seepage-dissolution processes in nature,serve as significant carriers of chemical weathering within the continuum of natural evolution.Presently,the research recognized by the academic community predominantly centers around the investigation of fracture dissolution under conditions of homogeneity and isotropy.However,these findings are limited in their applicability to dissolution evolution scenarios influenced by the heterogeneity and anisotropy inherent in fractures.Over the past four decades,the complexity of real rock structures and fractures,coupled with the microscopic intricacies of the seepage-dissolution process,has obscured a clear understanding of the impact of various heterogeneity parameters on fracture dissolution characteristics.Consequently,this paper aims to analyze and elucidate the research status concerning the heterogeneity of geometric characteristics in rock fractures,the distribution heterogeneity of minerals,the mode of fracture dissolution,and the discriminant criteria.Moreover,it delves into the key problems inherent in the evolutionary process of natural fracture dissolution,analyzed the future research trends of rock fracture dissolution,and made research prospects.