Results 81 to 90 of about 3,166,101 (180)
Coal operator mining facts - 2005 [PDF]
Mining Operations: In 2005, a total of 2,063 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 14.1% of all mining operations.
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, 2020 with the increase of integrating coal mines under national coal de-capacity policy, the mining instability phenomenon of narrow coal pillar next to goaf is increasingly prominent, which has seriously restricted the safety and efficient production in coal
Beifang, WANG +5 more
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Research on the Intelligent System Architecture and Control Strategy of Mining Robot Crowds
EnergiesDespite the pressure of carbon emissions and clean energy, coal remains the economic backbone of many developing countries due to its abundant resources and widespread distribution.
Zenghua Huang +4 more
doaj +1 more source
Coal operator mining facts - 2006 [PDF]
Mining Operations: In 2006, a total of 2,113 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 14.2% of all mining operations.
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Gong-kuang zidonghua, 2016 For poor universal applicability of traditional coal-rock recognition methods whose application was limited by mining techniques and coal seam conditions, a coal-rock recognition method based on statistical modeling of steerable pyramidal decomposition ...
SUN Jiping, CHEN Bang
doaj +1 more source
Coal operator mining facts - 2007 [PDF]
Mining Operations: In 2007, a total of 2,030 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 13.7% of all mining operations. 1. Bituminous mines comprised 92.4% (n=1,875) and anthracite
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Strikes in Russia : the case of the coal-mining industry [PDF]
This thesis presents an analysis of the character and significance of strikes in post- Soviet Russia on the basis of a series of case studies of strikes in the coal-mining industry.
Borisov, Vadim
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Coal operator mining facts - 2004 [PDF]
"In 2004, a total of 2,011 coal mining operations reported employment to the Mine Safety and Health Administration (MSHA). Coal mines comprised 13.9% of all mining operations.
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Common difficulties and technology upgrade path of coal mine intelligent construction
Meitan kexue jishuThe present situation, common challenges, and technological upgrade pathways for intelligent coal mine development in China are analyzed. Based on construction practices from 2020 to 2025, it identifies that intelligent coal mine development has entered ...
Guofa WANG +5 more
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Deed of settlement of the Tomago Coal Mining Company.
Cover title.; Includes index.; Ferguson, no.
Tomago Coal Mining Company.
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