刊庆专刊+煤层气开发-瓦斯治理-甲烷减排一体化技术探索与实践

Exploration and practice of integrated technology of coalbed methane development-gas control-methane emission reduction

  • 摘要: 煤层气(煤矿瓦斯,甲烷)是与煤伴生、共生的烃类气体资源,协调煤炭甲烷能源气体、灾害气体和温室气体的“三重”属性,对我能源安全与环境保护具有重要意义。笔者对煤层气开发、开采煤层降突消突和甲烷减排技术进行了深入探讨,得出煤层气与煤炭协调开发的全生命周期的时空关系、赋煤区内构造煤广泛发育和煤与瓦斯易突出等,导致煤矿区煤层气高效勘探开发、瓦斯有效治理和甲烷综合利用技术受到长期约束。笔者在系统梳理了煤矿区煤层气开发、瓦斯治理和甲烷减排关键技术所面临的难题与挑战,提出了集“煤炭采前-采中-采后地面井一体化部署与接续抽采技术”“煤矿采动区地面井抽采-井下抽采井联合部署与协同抽采技术”“构造煤煤层气开发与煤层降突消突一体化技术”和“煤炭甲烷高浓度-中低浓度-超低浓度(高-中低-超低浓度)梯级开发利用与大气排放管控技术”为一体的煤层气开发-瓦斯治理-甲烷减排一体化技术体系。未来,该一体化技术体系有望在我国煤与煤层气协调开发全周期接续部署和全空间联合抽采、瓦斯治理新方法和煤矿生产全生命周期甲烷浓度梯级利用技术体系领域发挥更大作用,推动我国煤矿区煤层气有效勘探开发-瓦斯有效治理-煤炭甲烷全浓度减排技术与大气排放管控技术的工程应用和发展。

     

    Abstract: Coalbed methane (coal mine gas, methane, CBM) is a hydrocarbon gas resource associated with coal. It is of great significance for energy security and environmental protection to coordinate the ‘triple’ attributes of coal methane energy gas, disaster gas and greenhouse gas. The author has conducted in-depth discussions on CBM development, coal seam outburst reduction and outburst elimination, and methane emission reduction technologies. It is concluded that the space-time relationship of the whole life cycle of the coordinated development of CBM and coal, the extensive development of tectonic coal in the coal-bearing area, and the easy outburst of coal and gas lead to long-term constraints on the efficient exploration and development of CBM, effective gas control and comprehensive utilization of methane in coal mine areas. This paper systematically reviews the problems and challenges faced by the key technologies of coalbed methane development, gas control and methane emission reduction in coal mine areas. An integrated technology system of CBM development-gas control-methane emission reduction is proposed, which integrates ' integrated deployment and continuous extraction technology of surface wells before coal mining-in-mining-after coal mining ', ' joint deployment and collaborative extraction technology of surface wells extraction-underground extraction wells in coal mining area ', ' integrated technology of CBM development of tectonic coal and outburst reduction and outburst elimination of coal seam ' and ' cascade development and utilization of coal methane with high concentration-medium and low concentration-ultra low concentration ( high-medium and low-ultra low concentration ) and atmospheric emission control technology. In the future, the integrated technology system is expected to play a greater role in the field of full-cycle continuous deployment and full-space joint extraction of coordinated development of coal and coalbed methane in China, new methods of gas control and full-life cycle methane concentration cascade utilization technology system in coal mine production, and promote the effective exploration and development of coalbed methane in coal mine areas in China-effective gas control-engineering application and development of coal methane full concentration emission reduction technology and atmospheric emission control technology. It is concluded that the effective path of coal methane emission reduction in China is to continuously improve and implement the policy of coal mine gas emission reduction and utilization, construct the technical system of dynamic monitoring and control of coal mine methane in the whole life cycle, establish the demonstration mining area of industrialization and commercial operation base of comprehensive utilization of high-medium-low-ultra-low concentration coal methane, and realize the healthy operation and maintenance of coal methane emission reduction.

     

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