XieShengrong, YangBo, ZhangQing, SongHaizheng, SuoHaixiang, ZhangTao. Research on lift pressure system with combined pipeline and intensive drill⁃hole gas drainage along the layer in low permeability coal seam[J]. Journal of Mining Science and Technology, 2019, 4(1): 34-40.
Citation:
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XieShengrong, YangBo, ZhangQing, SongHaizheng, SuoHaixiang, ZhangTao. Research on lift pressure system with combined pipeline and intensive drill⁃hole gas drainage along the layer in low permeability coal seam[J]. Journal of Mining Science and Technology, 2019, 4(1): 34-40.
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XieShengrong, YangBo, ZhangQing, SongHaizheng, SuoHaixiang, ZhangTao. Research on lift pressure system with combined pipeline and intensive drill⁃hole gas drainage along the layer in low permeability coal seam[J]. Journal of Mining Science and Technology, 2019, 4(1): 34-40.
Citation:
|
XieShengrong, YangBo, ZhangQing, SongHaizheng, SuoHaixiang, ZhangTao. Research on lift pressure system with combined pipeline and intensive drill⁃hole gas drainage along the layer in low permeability coal seam[J]. Journal of Mining Science and Technology, 2019, 4(1): 34-40.
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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
- Received Date: 2018-11-26
- Rev Recd Date:
2018-11-26
- Publish Date:
2019-02-28
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Abstract
Aimingattheproblemofgaspre⁃drainageinhighgasandlowpermeabilitycoalseam,the strengthentechnologyofcoalseamgasextractionwasputforwardwhichisthesystemofcombinedpipe⁃ linetoliftthenegativepressureandintensivelargediameterdrill⁃holealongseam*Theextractionprin⁃ cipleofrealizingthepermeableincreasinginallzonebyintensivelargediameterdrill⁃holealongseam wasexplained*Accordingtothecontinuityliquidflowequationandenergyequation,theexpressionof liquidenergychangeswasestablishedtogetliquidenergygradientlinesinsectioncompetent pipe⁃ line*Combinedwiththe“negativepressure⁃flow”characteristiccurveofpre⁃drainagegasdrill⁃hole,the mechanismofincreasethenegativepressureandextractionscalarthroughcombinedpipelinewasclari⁃ fiedandtheparametersofstrengthenextractiontechnologyincoalseamwasconfirmedbypracticalex⁃ perience*Thepracticeshowedthatthistechnicaleffectongovernancegaswasremarkable,thegasex⁃ tractionrateinworkingfacewasabove55% andtheproductioncapacityincreasedfrom1*2Mt/ato 1*8Mt/a*Theuppercornergasconcentrationwasunderthesafetystandard,andthusthesafetyandef⁃
ficientlyminingincomplicatedgeologicalconditionswasrealized*
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References
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Proportional views