Dissertation > Excellent graduate degree dissertation topics show

The Mining Technology Optimizing Research of Remnant Orebody with Remnanted Old Workings

Author: HuLei
Tutor: GuXinJian
School: Hunan University of Science and Technology
Course: Mining engineering
Keywords: Mining program Fuzzy Optimization Scattered body movement Numerical Simulation Safety Measures
CLC: TD853
Type: Master's thesis
Year: 2008
Downloads: 116
Quote: 2
Read: Download Dissertation

Abstract


The old hole residues mine mining is a very complex project. Paper relies on the 2005 science and technology projects in Hunan Province the \, numerical simulation, on-site instance verification research means more in-depth study Xinlong old hole residual mining optimization problem. Xinlong old hole remnant ore mining conditions, select Sublevel caving, sub-level caving mining method, four downward layered cement filling mining method and veins drift Wearing dyke swarms mining law having a representation of the program. Fuzzy Optimization Method the various fuzzy mining process or subjective factors translate into mathematical form, the evaluation of several programs of quantitative analysis, the best mining plan for the veins drift Wearing pulse group mining law. Ore ore movement is typical bulk motion. Previous dispersion law of motion based on the study of the movement of the ore computer numerical simulation, obtained in different segments of heights and different thawing hole center distance put ore mine case loss rate and recovery. The results of numerical simulation analysis shows that with the ore port center distance increases, ore recovery significantly reduced; as the segmentation height increases, the the ore dilution rate has increased significantly. In order to improve the recovery rate of ore and lower dilution rate, put mine mouth center distance and segmentation height should try to take a small value, at the same time, using shorten thawing hole center distance and sublevel height higher recovery and less low dilution rate, it is required to increase the number of tunneling, ore recovery will increase the amount of engineering and cost, and therefore have a reasonable height to maximize the benefits of put mine mouth center distance and segmentation. The ore mined from the underground, above the overburden loss of support, the original rock mass stress equilibrium damage caused by the re-distribution of the rock mass stress, making the goaf around the rock mass displacement, deformation until the damage. Used a computer simulation of two different mining sequence under the ore body and surrounding rock stress, forward mining sequence is superior to retreat mining sequence. Because look forward mining sequence the entire cross-off process is relatively stable, is conducive to the stability of the roof from the roof control control; tunneling security, forward-mining sequence, tunneling stress are relatively uniform superposition and will not cause major security problems; conditions from ore and ore loss rate, retreat mining sequence the fifth step excavation release is not adopted to support the ore body excavation formed the first four steps, loose mine The body may be compacted agglomerate chunk of body, will worsen ore conditions and increase the ore loss rate. Residual mining safety issues generally include security issues in the mining process and after the destruction of surface mining. Survey of the main problems facing the remnant ore mining on the basis of analysis of the the security technical problems Xinlong old hole remnant ore mining process, several security measures to provide a reliable, mine production safety guarantee.

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 > Mining Engineering > Mining > Metal ore mining > Underground mining
© 2012 www.DissertationTopic.Net  Mobile