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Metal Mine ›› 2015, Vol. 44 ›› Issue (10): 46-50.

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Influence Analysis on Surface Deformation Under Different Pillar Sizes of Overhand Cut and Filling Mining Method

Yang Jiamian1,2,3,Wang Shaoyuan1,2,3,Wang Xing1,2,3   

  1. 1.Sinosteel Maanshan Institute of Mining Research Co.,Ltd.,Manshan 243000,China;2.State Key Laboratory of Safety and Health for Metal Mine,Manshan 243000,China;3.National Engineering Research Center of Huawei High Efficiency Cyclic Utilization of Metal Mineral Resources Co.,Ltd.,Manshan 243000,China
  • Online:2015-10-15 Published:2015-11-20

Abstract: With the continuous development of China's national economy,the demand for mineral resource is increasing.Some "three-under" resources that was not worth mining in the past are gradually listed to be mined.It is a focus in the study of mining industry in recent years that how to recycle those resources safely,efficiently,economically and ensure the safety of the related facilities on the surface.The panel overhand cut and filling mining method which is suitable for low value resources is put forward based on the mining technology condition of Cangshan Iron Mine.Groups of parameters including pointed pillar size and exposed area of roof are primarily selected by reference to the similar mining experience.Then,the numerical simulation is used to analyze and predict its influence on surface deformation.The results show that the scheme with pillar size 4m×4m and exposed area of roof 500 m2 is optimal,compared with other schemes.It improves the ore recovery by 3% ~ 5%.The simulation results show that the surface deformation value is less than the allowed under the recommended parameters.

Key words: Pointed pillar size, Numerical simulation, Surface deformation