中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (4): 104-109.doi: 10.16265/j.cnki.issn1003-3033.2017.04.019

• 安全工程技术科学 • 上一篇    下一篇

突出煤层瓦斯吸附解吸特性核磁共振谱试验研究

唐巨鹏 教授, 田虎楠, 马圆   

  1. 辽宁工程技术大学 力学与工程学院,辽宁 阜新 123000
  • 收稿日期:2016-12-08 修回日期:2017-02-20 发布日期:2020-11-22
  • 通讯作者: 田虎楠(1985—),男,河南许昌人,博士研究生,研究方向为矿山灾害力学。E-mail:tianhunan1985@126.com。
  • 作者简介:唐巨鹏 (1976—),男,辽宁锦州人,博士,教授,博士生导师,主要从事矿山灾害力学、煤层气和页岩气开采相关理论及试验研究。E-mail:jupengt@126.com。
  • 基金资助:
    国家重点研发计划项目(2016YFC0600901);国家自然科学基金面上项目资助(51374119);辽宁省高等学校优秀人才支持计划(LR2015028)。

Experimental research on adsorption-desorption characteristics of methane in outburst coal by using nuclear magnetic resonance spectrums

TANG Jupeng, TIAN Hu'nan, MA Yuan   

  1. School of Mechanics and Engineering,Liaoning Technical University, Fuxin Liaoning 123000,China
  • Received:2016-12-08 Revised:2017-02-20 Published:2020-11-22

摘要: 随着深部开采的推进,煤与瓦斯(甲烷)突出已成为安全高效采矿的重大隐患,煤中瓦斯赋存运移微细观作用机制试验研究至关重要。采用核磁共振T2谱技术,以阜新盆地孙家湾矿高瓦斯高突煤层为例,试验研究煤样瓦斯吸附解吸核磁共振谱,模拟煤层瓦斯赋存和运移全过程。结果表明,吸附态、游离态和自由态瓦斯核磁共振T2谱范围可由不同T2截止阈值定量划分;吸附过程和解吸过程中,吸附态瓦斯量与瓦斯压力的关系符合朗格缪尔方程,而游离态瓦斯量与瓦斯压力成线性关系;吸附态瓦斯解吸过程表现出一定滞后性,且存在5.5 MPa临界滞后压力,游离态瓦斯解吸过程无明显滞后性。

关键词: 突出煤层, 核磁共振T2谱, 吸附态瓦斯, 游离态瓦斯, 吸附解吸

Abstract: With the development of deep mining, coal and methane outbursts have become a major hidden danger, and experimental research on the micro-mechanisms of methane storage and transportation is very important. In order to simulate the storage and transportation processes of methane in coal,the nuclear magnetic resonance T2 spectrum technique was applied for the adsorption-desorption experimental research of high methane and outburst coal from Sunjiawan Mine in Fuxin basin. Results indicated that the T2 spectrum boundaries of adsorbed methane and porous medium-confined methane and bulk methane could be defined with cut-off time of transversal relaxation time, that the relation between methane pressure and shale-adsorbed methane can be described with a Langmuir equation, that there is a linear relation between methane pressure and porous medium-confined methane, that the desorption processe of adsorbed methane lagged behind adsorption, and the hysteresis critical pressure is 5.5 MPa,and that the hysteresis of porous medium-confined methane is not obvious.

Key words: outburst coal, nuclear magnetic resonance T2 spectrums, adsorbed gas, porous medium-confined gas, adsorption-desorption

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