ICGCM Papers:
Analytical and Numerical Modeling Studies
 
 
Optimization of Chain Pillars Design in Longwall Mining Method
29th International Conference on Ground Control in Mining
Optimization of Chain Pillars Design in Longwall Mining Method
by
Navid Hosseini, Islamic Azad University, South Tehran Branch, Tehran, IranKazem Oraee, University of Stirling, Stirling, United KingdomMehran Gholinejad, Islamic Azad University, South Tehran Branch, Tehran, Iran
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[Conference] 29th International Conference on Ground Control in Mining
[Price] Free  [Comments] 0
[Topical Area] Analytical and Numerical Modeling Studies
[Author] Navid Hosseini, Islamic Azad University, South Tehran Branch, Tehran, IranKazem Oraee, University of Stirling, Stirling, United KingdomMehran Gholinejad, Islamic Azad University, South Tehran Branch, Tehran, Iran
[Abstract] Chain coal pillars are parts of the structure of longwall mining face that play a significant role in stability of the entries. With developments in the various aspects of the method, higher efficiency in optimization of the design of chain coal pillars seems appropriate. In this paper, the three main methods, namely the empirical, analytical and numerical methods are compared. Real data of Tabas-Iran coal mines have been used in order to make the comparison process reliable. It concluded that the most apparent advantage of the empirical method is the reliability of the results whilst the use of numerical methods enjoys the advantage of flexibility. On the other hand, the analytical methods are complex unless simplifying assumptions are made that can substantially decrease the accuracy of result which is thought to be the main advantage of the design method. A new method is therefore introduced here that combines all the three presently used methods and by doing so, the new method has all the advantages of all while minimizing complexities and inaccuracies associated with the use of the individual methods.