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[期刊论文] 作者:Das Arka Jyoti,Mandal Prabhat, 来源:矿业科学技术学报:英文版 年份:2017
In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structu...
[期刊论文] 作者:Das Arka Jyoti,Mandal Prabhat Kumar,Ghosh Chandra Nath,Sinha Amalendu,, 来源:International Journal of Mining Science and Technology 年份:2017
In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structu...
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