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steffen and holt open pit mining in haiti

steffen and holt open pit mining in haiti

Nov 14, 2011018332The horizon miningsystem combining work on the Ponbetu and Yayoi coal seams used technology from the GHH Coalmining Company in Germany. The mine achieved a production of 1,420,000t in 1970, but in 1971 its underground workings were combined with those of the neighbouring Akabira Coalmine and the Sumitomo Ponbetu shafthead ceased active production.

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    Nov 14, 2011018332The horizon miningsystem combining work on the Ponbetu and Yayoi coal seams used technology from the GHH Coalmining Company in Germany. The mine achieved a production of 1,420,000t in 1970, but in 1971 its underground workings were combined with those of the neighbouring Akabira Coalmine and the Sumitomo Ponbetu shafthead ceased active production.

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