应用压力感知胶片测定岩石连通空隙的分布  

The Mensuration on the Distribution of Communicating Interstices in Rocks Via Pressure Sensitivity Film

作　　者：罗绍河[1] 後藤龍彦 

机构地区：[1]河南理工大学资源环境学院,河南焦作454003 [2]室蘭工业大学,日本室蘭050-8585

出　　处：《地质科技情报》2008年第6期93-97,共5页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40772153)

摘　　要：以太平洋煤矿所采取的细砂岩钻孔岩心为对象,采用与岩石密切接触的压力感知胶片通以氮气的方法对岩石的连通空隙进行了测定。研究表明:①应用压力感知胶片测定岩石连通空隙的分布是可行的;②岩石的空隙分布具有各向异性,即岩心周边空隙分布多,形状不规则;向中心靠近,空隙尺度变小、形状变圆;③岩石空隙分布与其在地下受到的地壳应力大小和方向具有密切的相关性。The measure and appraisal of permeability of hydraulically-tight rocks are greatly significant for the facilities related to underground disposal of radioactivity wastes. As the permeability of rocks is determined by the connectivity of interstices, and thus, determining the size and connectivity of interstices in rocks is not only the basis of finding out rocks＇ permeability, but also helpful to ascertain the features of rocks＇ crustal stress. In the paper, core samples of sandstone were selected and their communicating interstices were mensurated via pressure sensitivity film. The results show： ① that it is feasible to mensurate the distribution of communicating interstices in rocks via pressure sensitivity film;② that the distribution of interstices is anisotropic. Namely, there are many irregular-shaped interstices on the fringes of rock core. The closer to the central part the interstices are, the more circular and smaller they become; ③The distribution of interstices is closely related to the intensity and direction of crustal stress.

关 键 词：渗透性 连通空隙 空隙分布 

分 类 号：TU453[建筑科学—岩土工程]