岩体结构面面密度的数字化统计方法及其应用  

Digital method for acquiring 2D density of discontinuity and its application

作　　者：郑健[1] 章杨松[1] 李晓昭[2] 石杏喜[1] 

机构地区：[1]南京理工大学土木工程系,江苏南京210094 [2]南京大学地球科学与工程学院,江苏南京210093

出　　处：《水文地质工程地质》2015年第6期80-85,共6页Hydrogeology & Engineering Geology

基　　金：国防科技重点项目(科工二司[2012]491号);国家自然科学基金项目资助(40872172)

摘　　要：岩体结构面密度是结构面三维网络模拟的基本参数,一般是在现场通过测窗法人工记录、统计计算得到,效率较低,易出错。为此,提出了一种可以由计算机完成结构面面密度统计估算的数字化方法。该方法主要包括三个步骤:建立结构面迹线及露头面三维数字模型(简称迹线三维模型);自动布置数字化矩形及圆形测窗;基于数字化测窗自动计算结构面面密度。将其应用于甘肃北山调查区域,验证了Mauldon估算理论的准确性,发现以双参数负指数分布函数拟合面密度分布一般具有良好的效果。实践证明,该数字化统计方法可高效准确地完成大量结构面面密度的统计工作,有很好的应用前景。The discontinuity density which is used to express the distribution features of discontinuities is one of the most important parameters of 3D discontinuity network simulation. In general,it is acquired by using sampling windows with manual work on site. The method is inefficient and fallible. This paper proposes a digital method which can take the advantage of computer to acquire 2D density of discontinuity. The method contains three steps： establishing a 3D digital trace model,disposing digital sampling windows,running the program to acquire 2D density of discontinuity. It is applied in the Beishan area in Gansu. The accomplishments show that the Mauldon theory for estimating is relatively accurate and using two-parameter negative exponential function to fit the distribution of 2D density is commonly appropriate. This study shows the feasibility and efficiency of the digital method and it has broad prospects in practical application.

关 键 词：结构面面密度 迹线三维模型 数字化测窗 自动化统计与估算 双参数负指数分布 

分 类 号：TU457[建筑科学—岩土工程]