Dissertation > Excellent graduate degree dissertation topics show

Mechanism and Numerical Simulation of Rock’s Crack Propagation Under Detonation Gas

Author: LiZhiHong
Tutor: DangFaNing
School: Xi'an University of Technology
Course: Geotechnical Engineering
Keywords: Detonation gas Crack propagation Non - uniformity of Ground stress Numerical Simulation
CLC: TU458
Type: Master's thesis
Year: 2006
Downloads: 466
Quote: 1
Read: Download Dissertation

Abstract


The rock blasting damage and fracture process is a complex process . Due to the non- uniformity and anisotropy of the rock material , in theory, it is difficult accurate description of the characteristics of its composition ; micro- defects under external loads , as well as the complexity of the interactions between the macroscopic crack , existing analytical method still lacks effective means of this study ; and because of the limitations of laboratory equipment , testing methods , not on blasting rupture process microscopic changes in the hierarchy of audience measurement , in particular, can not be precise observation of the non - uniform stress and strain fields . Thus, rock blasting damage and fracture mechanism , and the use of a numerical model simulation of the complex nature of the rock , thus simulating blasting the whole process of crack development , is one of the main topics of the blasting theoretical and technical development as well informed as possible . Rock fracture mechanics and damage theory based study the damage fracture mechanism of rock under explosive stress wave action and detonation gas quasi-static effect . Quasi-static effect of crack propagation in-depth analysis of the detonation gas that blasting engineering , crack propagation , rock crushing detonation gas due to the role of the detonation gas is the main reason of crack propagation in rock . On this basis , a numerical simulation of the the detonation gas under quasi-static rock crack propagation process . Based on the understanding of rock mesostructure , considering the non - uniformity of the rock , the rock material properties described by some statistical regularity - in accordance with a given Weibull distribution and normal distribution to assignment . Establish a meso -level analysis of rock failure process non-uniform model , heterogeneity of rock and initial stress on crack propagation analysis . After calculation shows that the homogeneous coefficient is the characterization of the nature of the rock material microstructure difference parameter determining the internal factors of the macro - mechanical properties of rocks ; In situ stress known case , the initial crack and the angle between the direction of the maximum horizontal stress more the smaller, the greater the length of crack propagation , the smaller the angle the greater the length of the crack propagation , crack propagation total length anywhere stress decreases . Thus, the Highlands stress conditions , and other geological conditions the same rock harder to blasting, and explosives consumption to a corresponding increase .

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  5. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  6. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  7. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  10. Numerical Simulation of Biomass Direct Reburning,TK16
  11. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  12. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  13. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  14. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  15. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  16. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  17. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  18. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  19. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  20. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13
  21. Numerical Simulation and Experimental Study of Air-Assisted Sprayer of Orchard,S491

CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Rock ( rock ) mechanics and rock testing > Indoor rock test
© 2012 www.DissertationTopic.Net  Mobile