斜坡非饱和带低渗透岩石结构体风化前锋扩展过程

非饱和带低渗透岩石结构体风化前锋扩展是斜坡灾害孕育过程中的关键环节之一。到目前为止,化学风化领域的研究成果主要集中在高水-岩比的饱和环境下单矿物及矿物成分单一的碳酸盐岩的风化动力学方面,非饱和环境下的岩石风化研究还主要限于风化产物的特性描述方面。斜坡非饱和带低渗透岩石结构体风化前锋扩展是一种高度复杂的THMC过程。由于在溶解对象、溶解液及溶解过程的水动力-水化学环境等方面存在的显著差异,既有的地质材料风化动力学成果为探索这一复杂过程提供了理论储备,但还不能阐明其核心机理。斜坡非饱和带低渗透岩石结构体风化前锋的扩展过程研究不仅可以加深人们对斜坡灾害孕育的理解,为灾害预报-预警及其控制提供理论依据,同时可以促进岩石-岩体力学及浅表生水文地球化学等相关学科的交叉与发展。

Propagation process of weathering fronts of rock blocks with low permeability in vadose zones of slopes

Propagation process of weathering fronts of rock blocks with low permeability in vadose zones is one of the most important links in the breeding process of slope hazards. So far, the related research achievements mainly concentrate on weathering kinetics of single mineral and carbonate rock under saturation environment with high water-rock ratio; the researches about rock weathering under unsaturated environment only involve the characteristics of weathering products. Propagation of weathering fronts of rock blocks with low permeability in vadose zones of slopes is a complex thermo-hydro-mechanical-chemical process. Because of the differences in objects and solutions of the dissolution and in hydrodynamic and hydrochemical environment of the dissolution process, etc., the existing weathering kinetics theory of geological materials cannot clarify the key mechanics of weathering front propagation of rock blocks with low permeability in vadose zones. Investigating propagation process of weathering fronts of rock blocks in vadose zones will not only deepen the understanding of slope hazards, but also promote the hybrid of rock mechanics and hydrogeochemistry and their development.