Journal of Mining & Safety Engineering ›› 2014, Vol. 31 ›› Issue (4): 532-536.

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Basic study on automatic detection of coal and gangue in the fully mechanized top coal caving mining

  

  • Online:2014-07-15 Published:2014-08-28

Abstract: The key to realize the automatic fully mechanized top coal caving mining technology is the automatic detection of coal and gangue. Therefore, detection of gangue rate in coal gangue mixture of drawing opening by using of the dual-energy γ-ray method has been proposed and the attenuation law has been analyzed when dual-energy γ-ray crosses the coal gangue mixture. Quantitative relationship is established between gangue rate and ash content. The parameters of the gangue rate and ash content by experimental analysis has been studied and their correlation has been built. Real-time response property of the equipment has been tested in the experiment. The results show that dual-energy γ-ray method is feasible for real-time detecting the gangue rate of coal gangue mixture.

Key words: coal gangue detection;fully mechanized top coal caving mining;dual-energy &gamma, -ray method;gangue rate