桂林理工大学学报2017，Vol.37Issue(3)：399-404,6.DOI:10.3969/j.issn.1674-9057.2017.03.001
石漠化地区石灰岩和白云岩的溶蚀-蠕变特性试验研究——以贵州贞丰-关岭花江岩溶区为例
Experiment on dissolution-creep characteristics of limestone and dolomite in rocky desertification area: a case study of Zhenfeng-Guanling Huajiang karst region in Guizhou
摘要
Abstract
In order to analyze the mechanical and corrosion characteristics of carbonate rock and their effects on the evolution of rocky desertification,the study on the corrosion-creep performance of carbonate rock under mechanics-chemistry coupling was carried out.The results showed that 1) Under the condition of mechanics-chemistry coupling,the creep of carbonate rock is obvious.And the initial deformation of dolomite are higher than that of limestone.It shows that under the action of external force,dolomite is more prone to deformation and failure.Besides,the creep deformation of dolomite increases with the loading time.But creep deformation of limestone happens mainly in the early stage of loading,then it tends to be stable.2) Under the coequal concentration of acid solution,the dissolution of carbonate rock is greater than that of unstressed condition in the same period of time.The dissolution rate of dolomite and calcite dolomite is proportional to the stress level.The dissolution rate increases with the increase of creep stress.With the increase of stress,the dissolution rate of limestone decreases at first and then increases.3) The dissolution occurs not only on the surface but also in the pores.The result of corrosion shows the increase of pore diameter and porosity of the rock.4) The mechanical characteristics and chemical properties of carbonate rocks in different lithology cause different forms of weathering and soil erosion,which is an important influence on the formation and evolution of rocky desertification.关键词
岩溶石漠化/石灰岩/白云岩/蠕变/溶蚀Key words
karst rocky desertification/limestone/dolomite/creep/dissolution分类
天文与地球科学引用本文复制引用
刘琦,白友恩,顾展飞,卢耀如,盛祝平..石漠化地区石灰岩和白云岩的溶蚀-蠕变特性试验研究——以贵州贞丰-关岭花江岩溶区为例[J].桂林理工大学学报,2017,37(3):399-404,6.基金项目
国家重点研发计划项目(2016YFC0502603) （2016YFC0502603）
国家自然科学基金项目(41772292) （41772292）
国家留学基金委资助项目 （）
U.S.Department of Agriculture-National Institute of Food and Agriculture Hatch Project via Texas AgriLife Research(TEX0-1-9448) （TEX0-1-9448）
