This study focused on the stability control of roof in long wall stratified mining of large dip angle thick coal seam.Taking Panbei Coal Mine in Huainan as an example, the effect mechanism of water content, compression ratio and grain size grading on the compression characteristics of gangue is analyzed by comprehensive application of gangue latera
Comminution processes are one of the most common processes for processing energy materials, e.g.coal, biomass, and post-recycling elements.The hitherto unsolved problem is the high energy consumption of machines and the lack of precise descriptions of the phenomenon of usafws patch comminution in terms of the relationship between the design feature
The article represents the analysis of the market of scientific publications and consequences of information asymmetry blue banana gorra in this market.Attention is paid to the participants of the market, including different kinds of middle-men that facilitate the interactions between authors and publishers.The purpose of the article is to clarify
Genetic analysis of 111 samples from ceviche cocktails and fish fillets used for ceviche, obtained from fish markets and processing plants in the Pacific zone of Panama were conducted to determine species composition, trace origin (native, nonnative or imported frozen species) and CITES species status.A total of 21 species were detected (20 fishes