对岩石风化程度敏感的化学风化指数研究  

Research on the Sensitive Chemical Weathering Indices to Rock Weathering

作　　者：刘成禹[1] 何满潮[2] 

机构地区：[1]福州大学环境与资源学院,福州350108 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《地球与环境》2011年第3期349-354,共6页Earth and Environment

基　　金：福建省自然科学基金项目(2007J0131)

摘　　要：风化是引起岩石力学性能劣化的重要因素,风化敏感性指数是对岩石风化程度进行定量评价和较准确地确定岩石风化深度的基础。本文在大量不同风化等级、时间及不同深度下岩样化学测试资料的基础上对风化敏感性化学风化指数进行了研究,研究表明:在前人提出的化学风化指数中,WI、WPI和LOI这三个指数对风化程度、时间和深度的变化都显示出明显的单调性和敏感性,可用它们作为评价岩石风化程度和确定风化深度的依据;ALK、a、b没有反映出与风化程度变化的单调性,不宜用它们作为评价岩石风化程度和确定风化深度的依据。Weathering is an important factor leading to the deterioration of mechanical properties of rocks,and the sensitive indices of weathering are the basis for quantificationally evaluating weathering degrees of rocks and determinging the depth of rock weathering.In this paper,based on a large number of chemical test data of rock samples under different weathering grades,time and different depths,the sensitive chemical weathering indices are studied.The study indicates that among the chemical weathering indices previously proposed,WI,WPI and LOI,show apparent monotonicity and sensitivity corresponding to the variations of weathering degree,time and depth.Therefore,the three indices can be used to evaluate the weathering degree of rock,and to determine the depth of weathering.Otherwise,ALK,a and b show no monotonicity corresponding to the variation of weathering degree,so they can not be used to evaluate the weathering degree of rock and determine the depth of weathering,either.

关 键 词：化学风化指数 风化深度 风化程度 风化时间 敏感性 

分 类 号：P512.1[天文地球—地质学] P642.5