Dissertation > Excellent graduate degree dissertation topics show

Research on Flow Field and Gas Distribution in Gob of Full-mechanized Mining Working Face

Author: LiuJiaJia
Tutor: GaoJianLiang
School: Henan Polytechnic University
Course: Safety Technology and Engineering
Keywords: Goaf Porous media Penetration Flow field Numerical Simulation
CLC: TD712
Type: Master's thesis
Year: 2011
Downloads: 200
Quote: 0
Read: Download Dissertation

Abstract


This article is based on the basic theory of fluid mechanics and porous media , determine the goaf air and gas mixing control equation , and the use of computational fluid dynamics , numerical simulation of mechanized mining Gob flow field and gas distribution law solver . Key factor mechanized mining face goaf flow field and gas distribution law of the simulation results using Fluent software , face turbulence parameter values ??of k-ε and permeability distribution size goaf gas gush source term . The results show that the face turbulent kinetic energy k and turbulent kinetic energy dissipation rate ε values ??of small mechanized mining face gob region simulation results goaf permeability distribution , size , and gas emission source term under goaf amount of air leakage and goaf gas explosion limits of width , there is a large difference between the position , on fully mechanized mining face certain mining empty area of the flow field and gas distribution law . In determining more accurately reflect the goaf caving coal and rock permeability distribution , size and closer to the actual situation of goaf gas emission on the basis of the source term , fully mechanized mining face W-type , Y-type , J -type ventilation mode goaf flow field distribution , gas migration law and spontaneous combustion with the numerical simulation, analysis to draw mechanized mining face W Ventilation can play an equalizing role of Fire Prevention and Control , effectively reducing the goaf gas the width of the explosion limit . Mechanized mining face Y type ventilation can be a good solution to the problem of spontaneous combustion of coal in Gobs in the elimination of the face and on the corner gas gauge problem , two Y-shaped back ventilation system , when , under the into the wind with the wind , Lane ratio of 1:3 , the face ventilation and exhaust dust effect . J-type ventilation can fundamentally solve the top corner gas build-up and return airway gas gauge problem , but increase the width of a the goaf gas explosion boundaries and Spontaneous Combustion mechanized mining face , so does not apply to spontaneous combustion coal seam high gas Workface .

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. Effectiveness Evaluation on the Jointed Combat of the Multiple Missiles and Research on Combinatorial Optimization Algorithm,TJ760.1
  8. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  9. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  10. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  11. Numerical Simulation of Biomass Direct Reburning,TK16
  12. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  13. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  14. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  15. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  16. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  17. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  18. Mathematics Teaching Material for Primary School Mathematical Thinking in the Point of Penetration,G623.5
  19. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  20. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  21. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649

CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Mine Gas
© 2012 www.DissertationTopic.Net  Mobile