Abstract

The results of drawing an interaction diagram in an analytical method and numerical calculations (using FLAC and UDEC software) indicates that the boundary points of tunnel are located in fracture envelope. Furthermore, there is a better compatibility between the results of analytical method and FLAC software. Considering the results obtained by genetic algorithm, we can conclude that the propagation of waves caused by missiles collision in mass rock tunnels, will be in applied single spot at the beginning and then in an extensive form. This confirms the results of numerical modeling to a great extent. Considering the results obtained by genetic algorithm, we can conclude that the propagation of waves caused by missiles collision in mass rock tunnels, will be in applied single spot at the beginning and then in an extensive form. This confirms the results of numerical modeling to a great extent.

1 Introduction

At the present time, it can be said that there are three methods for evaluating such problems:

  1. Physical modeling which is fairly simple. In this respect, Wei & Li (2007) carried out some researches about the effect of dynamical loads on joint's behavior.

  2. Using experimental relations for collision conditions, on the basis of repetitive experiments and developing simple dynamic models for collision and penetration by means of motion rules and principles ruling the behavior of materials.

  3. Numerical methods that include all real aspects of modeling and lead to more acceptable results. This is the method which is frequently used. Zhao and et al. were the first scientists who, using UDEC software, examined the explosion shock in mass rock environment in 1998. In addition, this group continued their comprehensive studies. For more information, we can refer to the sources mentioned at the end of the article. This study aimed to investigate the stability of underground structures influenced by both conditions, continues (without gaps and cracks) and discontinuous (with gaps and cracks) environments under Cruise missile collision by using FLAC, UDEC numerical software.

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