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20231018 · Theory and practice of fully mechanized longwall mining in steeply dipping coal seams by Y. Wu, P. Xie, H. Wang, D. Yun, S. Ren and X. Chen Abstract n Mining steeply dipping coal seams is a ...
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2014610 · Mine water inrush events often occur during coal mine construction and production in China and account for a large proportion of the nation’s coal mine disasters and accidents. Figure 1 shows the number of water-related hazards and casualties in coal mines of China between 2000 and 2011. Over the 12 years, 1,089 water incidents have …
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Solid backfill technology, which can achieve precise control of surface subsidence, has become the primary method used to extract "under three" coal resources (under railways, buildings, and water bodies), especially under buildings. This paper proposes a probability integration model for surface subsidence prediction based on the equivalent ...
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20231114 · 2.1 Interaction between Longwall Coal Mining and Room and Pillar Bauxite Mining in Coal Measures For coal and coexisting bauxite mining with upper coal and lower bauxite occurrence characteristics, if the lower bauxite is mined first, on the one hand, the roof of the goaf would be unstable and falls after the bauxite
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2022415 · Research and practice of intelligent coal mine technology systems in China. The role of coal as China’s basic energy source is considered and the development of the coal industry is examined, and the intelligent development of coal mines is focused on, with the “Chinese mode” of intelligent mining in underground coal mines introduced. …
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Underground tests and applications showed that the surrounding rock control technology based on mining-induced stress evolution significantly improved the stability and safety level of the roadway surrounding rock，achieving good rock control effects. Finally，the challenges in the study of underground stress fields in coal mines and the ...
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In the face of the new round of energy science and technology revolution and industrial change, for the new coal mine safety development requirements, intelligent mining is the way forward to achieve the safe and efficient production of China's coal mines. Intelligent mining is based on the concept of modern coal mine intelligence, the Internet ...
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Through the research on mining geological conditions and hydrogeological condition of mine, three extra-thick aquifers were detected over the roof of 16-3up coal seam, the first mining coal seam of mine. The upper water-enriched region was detected by the joint geophysical prospecting methods combined ground transient electromagnetic method …
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2024617 · Antracit. Antracit ( grč. Ανθρακιτης ), znači „vrsta uglja ”, od Anthrak [Ανθραξ], ugalj). Odlikuje se kao tvrd mineral, sastavljen od raznih vrsta uglja, sa visokim sjajem. [1] Poseduje najveći udeo ugljenika, najniži udeo primesa, kao i najviše kaloričnog sadržaja od svih vrsta uglja, uključujući crni ugalj ...
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Abstract. Read online. Roadway support theory and technology is the core research focus of strata control in coal mine.In this paper, the representative supporting theories of roadway are systematically sorted out, and the supporting technologies of roadway are expounded and analyzed in detail from the following three aspects:surrounding rock inside, roadway …
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