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    NYSIIS by Oketunji, A

    Published 2024
    Dataset
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    From rural Colombia to urban alienation by Arias, A

    Published 2012
    Journal article
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    Research on lift pressure system with combined pipeline and intensive drill-hole gas drainage along the layer in low permeability coal seam by Xie Shengrong, Yang Bo, Zhang Qing, Song Haizheng, Suo Haixiang, Zhang Tao

    Published 2019-02-01
    “…Aiming at the problem of gas pre-drainage in high gas and low permeability coal seam,the strengthen technology of coal seam gas extraction was put forward which is the system of combined pipeline to lift the negative pressure and intensive large diameter drill-hole along seam.The extraction principle of realizing the permeable increasing in all zone by intensive large diameter drill-hole along seam was explained.According to the continuity liquid flow equation and energy equation,the expression of liquid energy changes was established to get liquid energy gradient lines in section competent pipeline.Combined with the “negative pressure-flow” characteristic curve of pre-drainage gas drill-hole,the mechanism of increase the negative pressure and extraction scalar through combined pipeline was clarified and the parameters of strengthen extraction technology in coal seam was confirmed by practical experience.The practice showed that this technical effect on governance gas was remarkable,the gas extraction rate in working face was above 55% and the production capacity increased from 1.2 Mt/a to 1.8 Mt/a.The upper corner gas concentration was under the safety standard,and thus the safety and efficiently mining in complicated geological conditions was realized.…”
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    Article
  10. 630

    Taiwan - Young China's Democracy by Rudolf Fürst

    Published 2004-09-01
    “…The discussion opposed the anarticle written by the journalist Fareed Zakaria, who had pointed out at athe positive role of liberalisation under the authoritarian regimes in comparison with quick democratization in ilnon-liberal baeckgrounds. …”
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    Article
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