Dissertation > Excellent graduate degree dissertation topics show

Prediction of Spontaneous Combustion and Numerical Simulation of Flow Field in Fully-Mechanized Face of Goaf

Author: ZhangXiaoGang
Tutor: YuMingGao
School: Henan Polytechnic University
Course: Safety Technology and Engineering
Keywords: Goaf Spontaneous Combustion Prediction Numerical Simulation
CLC: TD752.2
Type: Master's thesis
Year: 2009
Downloads: 116
Quote: 0
Read: Download Dissertation

Abstract


Coal mining in the course of a year due to spontaneous combustion caused by direct and indirect economic loss of nearly 100 billion yuan. In the 1990s, caving coal mining method has been vigorously applied. Fully mechanized mining face left more one-time coal and the wind of working face for relatively large volume, due to the intensity of exploitation of a large space to take off; two top coal emit low rate, the gob with two large accumulation of loose coal. That substantial increase coal production and the efficiency of coal production, but also it left a large number of floating coal in goaf. That makes the problem of spontaneous combustion in goaf more fearfulness.In this article, it put forward that based on temperature oxidation process of gas changes, and combined with the spontaneous combustion of coal properties, to find the goaf of the indicate spontaneous combustion gases. It did the experiment of the oxidation of coal for heating up, to find gases the relationship between temperature and volume in different circumstances, such as carbon monoxide and carbon dioxide. Using this method to determine the Wangtaipu 2304 working-face goaf of the indicate spontaneous combustion gases. It did conduct on-site observation in goaf, and gained distribution concentration of temperature, oxygen in goaf. The use of aggregative indicator method to carve up“three zones”in goaf. Using of percolation theory, it establishment mathematical model of flow field in goaf. The use of fluid calculation software FLUENT to partition of fully-mechanized face goaf areas mesh, combined with characteristic parameter of the spontaneous combustion and data of on-site observations to determine its boundary conditions; that solved seepage field of goaf and concentration field model, to situation of air leakage and the concentration of gas distribution components in goaf. Numerical simulation results to the scene more realistic consensus. At the same time, it did contrastive analysis with on-site observation. The results shows that methods of the establishment the numerical simulation are correct, and simulate the results will play guide role in preventing mine fire.

Related Dissertations

  1. Research on Graph-Based Algorithm for Tagsnps Selection,Q78
  2. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  3. Study on Springback of High-Strength Steel Stamping,TG386
  4. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  5. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  6. The Brake Performance of Hydraulic Retarder and Simualtion Research on Its Application for Aircraft Arrestment,TH137.331
  7. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  8. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  9. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  10. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  11. Lifetime Prediction and Channel Wall Erosion Accelerate Test of Hall Thruster,V439.2
  12. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  13. Numerical Simulation of Biomass Direct Reburning,TK16
  14. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  15. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  16. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  17. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  18. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  19. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  20. Process Support Vector Machine and Its Application to Satellite Thermal Equilibrium Temperature Prediction,TP183
  21. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832

CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine fire > Mine Fire > Internal fire and prevention
© 2012 www.DissertationTopic.Net  Mobile