Creep Behavior of Unconsolidated Rock with Mathematical Concept Solution

Myoung-Hwan Jang

doi:10.7474/TUS.2018.28.1.025

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2018 Vol.28, Issue 1 Preview Page Next Page

Case Study

Creep Behavior of Unconsolidated Rock with Mathematical Concept Solution 수학적 개념 해를 적용한 미고결 암석의 Creep거동 해석

1 February 2018. pp. 25-37

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Abstract

Burger’s model was used to analyze creep characteristics of unconsolidated rock. Burger’s model should determine four physical parameters from two pairs of data. In this study, physical parameters of Burger’s model were determined by applying mathematical concept solution. Creep was accelerated for three years using the determined physical parameters of the Burger’s model for unconsolidated rocks. As a result, the creep behavior showed a continuous deformation behavior without convergence. Therefore, in this mine, it is analyzed that the application of U-Beam is more appropriate than roofbolt in terms of stability.

Keywords

Burger’s model

Mathematical concept solution

Physical parameters

Creep deformation behavior

Unconsolidated rock

미고결 암석에 대한 Creep 특성을 분석하고자 Burger 모델을 이용하였다. Burger 모델은 자료쌍 D(u,t)으로부터 4개의 역학적 매개변수를 결정 하여야 한다. 본 연구에서는 수학적 개념 해를 적용하여 매개변수를 결정 하였다. 미고결 암석에 대한 Burger 모델의 결정된 매개변수를 이용하여 Creep을 3년간 가속시켰다. 그 결과 Creep 거동은 수렴이 되지 않고 지속적인 변형거동을 보였다. 따라서 본 광산에서는 Roofbolt 보다 U-Beam 적용이 안정성 측면에서 더 적합 할 것으로 분석 되었다.

키워드

Burger 모델

수학적 개념 해

매개변수

Creep 변형거동

미고결 암석

References

Donald W. Marquardt, 1963, An Algorithm for Least-Squares Estimation of Nonlinear Parameters, Journal of the Society for Industrial and Applied Mathematics, Vol.11 431-441.

10.1137/0111030

Hong JS and Jeon S., 2004, Characteristics of Creep Deformation Behavior of Granite under Uniaxial Compression, Tunnel & Underground Space, 14.1, 69-77.

Jacques, Whitford and Associates Limited, 1994, Geotechnical Testing Program BOLEO Copper Project, 15p.

Kim YS, Jung SK, Cha JS, Bang CI, 2003, The Creep Behavior of Shale in Daegu Area, Tunnel & Underground Space, 13.2, 100-107.

Yoon, Y. and Jo Y., 2010, Prediction of Failure Time of Tunnel Applying the Curve Fitting Techniques, Tunnel & Underground Space, 20.2, 97-104.

Information

Publisher :Korean Society for Rock Mechanics and Rock Engineering
Publisher(Ko) :한국암반공학회
Journal Title :Tunnel and Underground Space
Journal Title(Ko) :터널과 지하공간
Volume : 28
No :1
Pages :25-37
Received Date : 2018-01-02
Revised Date : 2018-01-16
Accepted Date : 2018-01-19
DOI :https://doi.org/10.7474/TUS.2018.28.1.025

Tunnel and Underground Space ISSN:1225-1275(Print) 2287-1748(Online) 터널과 지하공간

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