The Application of 3DEC on the Transmitting of Carrying Shaft Stress Analysis

• Main Authors: Tuan Shuan Yuan, 段玄芸
• Other Authors: Ding Yung Chin
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/95875207249848142023

碩士 === 國立臺北科技大學 === 材料及資源工程系碩士班 === 91 === A mine shaft is usually the access for transportation of the underground mine. Along with the depth of excavation the enlargement and collapse of shaft wall may occur, under no artificial support condition, due to the changes of the strength and the structure of rock encountered. As well known, the in-situ stress and strain around an opening is in 3 dimensional condition. Therefore, the 3DEC numerical analysis used in this research can simulate the mechanical behaviors in rock shaft sinking operation. By using this technique the 3-dimensional solution of numerical model can be constructed and analyzed. In this research, the mechanical behavior of a 3 dimensional joint rock body was introduced. The Objective of this paper is to simulate the mechanical behaviors of a shaft opening which contains 3 dimensional joint system using practical stress data. In this paper, the Bo-Lai Mine at Ho-Ping Cement Region in Hualien County was studied. The simulation was conducted on the s transportation haft excavated in jointed marble. The depth of this shaft is 375 m with 6m in diameter and no underground water. The influence of varopis joint concentration on the stress distribution and stability of shaft wall were first discussed. Finally, the comparison between the original predicted theoretical stress distribution and experimental equation calculating value were also discussed under several preset rock conditions.