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The Analysis of Structural Homogeneity of Bei Shan Area

Author: WangYiZhuang
Tutor: LiXiaoZhao
School: Nanjing University
Course: Geological Engineering
Keywords: discontinuity division of homogeneity Beishan area
CLC: TU42
Type: Master's thesis
Year: 2011
Downloads: 90
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Abstract


Discontinuity investigation, analysis, modeling are important aspects of rock mass. In reality, the spatial distribution of discontinuities in rock mass often changes from one cell to another, and the nature of geology, geomechanics, and hydrogeology is different. It is primary to determine the similarity of rack masses. So analysis of homogeneity of rack masses are the basis of all the analysis work.This paper focuses on the division of homogeneity of BeiShan area. And the work include:the data error correction, the special processing of data for division methods, the choice and implementation of existing division methods, and using these methods on BeiShan area. And how to apply these methods to special situations has been studied. The main achievements are as follows:The existing division methods are summed up and are divided into two categories:the methods which compare the two samples to get the parameter, and the methods which calculate only one sample to get a parameter. Discontinuity property of each division method has been summarized. Combining the discontinuity properties with the engineering characteristics, choice has been made about the discontinuity properties which can be used in BeiShan area. The attitude, trace length, fractal dimension are selected for analysis of surface; the attitude, linear density, linear density of lower angle joints are selected for analysis of underground.Most of the methods are realized by the way of computer programming. The methods involved with attitude -Miller method, the correlation coefficient method, Mahtab method are applied to Bei Shan area, and the influencing factors, the applicability, advantages are analyzed. And also the same procedures are done to circular-window method. The existing software are used to implement the fractal dimension method, and the joint network generated by simulation methods are used to study which discontinuity properties the fractal dimension method can reflect. The B03 bolehole is divided into four zones, using the Miller method, linear density and the linear density of lower angle joints.Through the implementation of existing methods, a guidance about how to measure the joints sample in field is made. The area of rectangular surface outcrop and number of discontinuities should meet certain requirements; in order to determine the results of the homogeneity of underground, more boleholes are needed.

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Engineering geology, hydrogeology
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