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淹没煤颗粒瓦斯解吸规律实验研究.

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Title: 淹没煤颗粒瓦斯解吸规律实验研究.
Alternate Title: Experimental study on gas desorption law of short-term flooding coal particles during gas extraction.
Authors: 张增辉1,2 cumtwmy@sina.com, 张迪1,2, 魏明尧3
Source: Clean Coal Technology. 2025 Supplement, Vol. 31, p411-419. 9p.
Subject Terms: *Gas extraction, *Water immersion, *Saturation (Chemistry), *Adsorption (Chemistry), *Nuclear magnetic resonance, *Geology, *Coal dust, *Gas absorption & adsorption
Abstract (English): To elucidate the gas emission characteristics and influencing factors of gas-bearing coal under fracturing fluid inundation, this study systematically investigated the gas desorption law of coal particles under different inundation durations and adsorption equilibrium pressures using a self-designed experimental apparatus for atmospheric pressure water inundation and gas desorption. The results indicate that coal particle inundation behavior can be classified into two modes: "quasi-inhibition desorption" and "inundation desorption". Short-term inundation (10 minutes) resulted in a weak water-blocking effect, short desorption termination time, and total desorption volume close to that of dry coal samples. In contrast, longer inundation durations (60 minutes and above) significantly inhibited gas desorption, with prolonged desorption termination time and markedly reduced total desorption volume. Nuclear magnetic resonance analysis revealed that the water intake in mesopores is the key factor determining the desorption mode, while micropores rapidly saturate under short-term inundation, with the water absorption state of mesopores dominating the desorption behavior. Additionally, higher adsorption equilibrium pressures required longer minimum inundation durations, and secondary desorption phenomena became more pronounced, with desorption predominantly occurring during the 2nd to 3rd days after removal from inundation. This study provides a theoretical basis for the management of piled coal gas and the optimization of water inundation measures in underground coal mines. [ABSTRACT FROM AUTHOR]
Abstract (Chinese): 为探清大区域煤层压裂液水淹环境下含瓦斯煤的放散特性及其影响因素, 通过自主设计的常压水淹没煤粒瓦斯解吸实验装置, 系统开展了不同淹没时间与吸附平衡压力条件下煤颗粒瓦斯解吸规律的实验研究。结果表明, 煤粒淹没行为可分为"类浸润解吸"与"淹没解吸"2 种模式, 其中短时淹没 (10 min) 导致水锁效应较弱, 解吸中止时间短, 总解吸量接近干燥煤样; 而较长淹没时间 (60 min 及以上) 则显著抑制瓦斯解吸, 解吸中止时间长, 总解吸量显著降低。核磁共振分析表明, 中孔进水量是决定解吸模式的关键, 微孔在短时淹没下迅速饱和, 中孔吸水状态主导了解吸行为。此外, 吸附平衡压力越高, 所需最小淹没时间越长, 二次解吸现象越显著, 解吸多集中于脱离淹没后第 2~3 天。为煤矿井下开采煤体瓦斯管理及水淹措施优化提供了理论依据。 [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 191821357
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: 淹没煤颗粒瓦斯解吸规律实验研究.
– Name: TitleAlt
  Label: Alternate Title
  Group: TiAlt
  Data: Experimental study on gas desorption law of short-term flooding coal particles during gas extraction.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22张增辉%22">张增辉</searchLink><relatesTo>1,2</relatesTo><i> cumtwmy@sina.com</i><br /><searchLink fieldCode="AR" term="%22张迪%22">张迪</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22魏明尧%22">魏明尧</searchLink><relatesTo>3</relatesTo>
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  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Clean+Coal+Technology%22">Clean Coal Technology</searchLink>. 2025 Supplement, Vol. 31, p411-419. 9p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Gas+extraction%22">Gas extraction</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+immersion%22">Water immersion</searchLink><br />*<searchLink fieldCode="DE" term="%22Saturation+%28Chemistry%29%22">Saturation (Chemistry)</searchLink><br />*<searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink><br />*<searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance%22">Nuclear magnetic resonance</searchLink><br />*<searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink><br />*<searchLink fieldCode="DE" term="%22Coal+dust%22">Coal dust</searchLink><br />*<searchLink fieldCode="DE" term="%22Gas+absorption+%26+adsorption%22">Gas absorption & adsorption</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: To elucidate the gas emission characteristics and influencing factors of gas-bearing coal under fracturing fluid inundation, this study systematically investigated the gas desorption law of coal particles under different inundation durations and adsorption equilibrium pressures using a self-designed experimental apparatus for atmospheric pressure water inundation and gas desorption. The results indicate that coal particle inundation behavior can be classified into two modes: "quasi-inhibition desorption" and "inundation desorption". Short-term inundation (10 minutes) resulted in a weak water-blocking effect, short desorption termination time, and total desorption volume close to that of dry coal samples. In contrast, longer inundation durations (60 minutes and above) significantly inhibited gas desorption, with prolonged desorption termination time and markedly reduced total desorption volume. Nuclear magnetic resonance analysis revealed that the water intake in mesopores is the key factor determining the desorption mode, while micropores rapidly saturate under short-term inundation, with the water absorption state of mesopores dominating the desorption behavior. Additionally, higher adsorption equilibrium pressures required longer minimum inundation durations, and secondary desorption phenomena became more pronounced, with desorption predominantly occurring during the 2nd to 3rd days after removal from inundation. This study provides a theoretical basis for the management of piled coal gas and the optimization of water inundation measures in underground coal mines. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Chinese)
  Group: Ab
  Data: 为探清大区域煤层压裂液水淹环境下含瓦斯煤的放散特性及其影响因素, 通过自主设计的常压水淹没煤粒瓦斯解吸实验装置, 系统开展了不同淹没时间与吸附平衡压力条件下煤颗粒瓦斯解吸规律的实验研究。结果表明, 煤粒淹没行为可分为"类浸润解吸"与"淹没解吸"2 种模式, 其中短时淹没 (10 min) 导致水锁效应较弱, 解吸中止时间短, 总解吸量接近干燥煤样; 而较长淹没时间 (60 min 及以上) 则显著抑制瓦斯解吸, 解吸中止时间长, 总解吸量显著降低。核磁共振分析表明, 中孔进水量是决定解吸模式的关键, 微孔在短时淹没下迅速饱和, 中孔吸水状态主导了解吸行为。此外, 吸附平衡压力越高, 所需最小淹没时间越长, 二次解吸现象越显著, 解吸多集中于脱离淹没后第 2~3 天。为煤矿井下开采煤体瓦斯管理及水淹措施优化提供了理论依据。 [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=191821357
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.13226/j.issn.1006-6772.25091901
    Languages:
      – Code: chi
        Text: Chinese
    PhysicalDescription:
      Pagination:
        PageCount: 9
        StartPage: 411
    Subjects:
      – SubjectFull: Gas extraction
        Type: general
      – SubjectFull: Water immersion
        Type: general
      – SubjectFull: Saturation (Chemistry)
        Type: general
      – SubjectFull: Adsorption (Chemistry)
        Type: general
      – SubjectFull: Nuclear magnetic resonance
        Type: general
      – SubjectFull: Geology
        Type: general
      – SubjectFull: Coal dust
        Type: general
      – SubjectFull: Gas absorption & adsorption
        Type: general
    Titles:
      – TitleFull: 淹没煤颗粒瓦斯解吸规律实验研究.
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            NameFull: 张增辉
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            NameFull: 张迪
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            NameFull: 魏明尧
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            – D: 02
              M: 12
              Text: 2025 Supplement
              Type: published
              Y: 2025
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              Value: 31
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            – TitleFull: Clean Coal Technology
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