煤炭工程 ›› 2013, Vol. 45 ›› Issue (5): 99-102.doi:

• 研究探讨 • 上一篇    下一篇

不同变质成因无烟煤孔隙特征及其对瓦斯突出的影响

蔺亚兵   

  1. 陕西省煤田地质局勘察研究院
  • 收稿日期:2012-09-14 修回日期:2012-10-15 出版日期:2013-05-10 发布日期:2013-05-10
  • 通讯作者: 蔺亚兵 E-mail:lybcbm@126.com

Study on the pore properties of different metamorphic causes anthracite body structure coals and the effects on gas outburst based

  • Received:2012-09-14 Revised:2012-10-15 Online:2013-05-10 Published:2013-05-10

摘要: 煤的孔隙特征是影响瓦斯突出的重要因素。本文对三种不同变质成因的无烟煤进行了低温液氮吸附实验,分析了不同变质成因无烟煤的孔隙特征。提出了无烟煤低温液氮脱附回线区别于烟煤的新的类型。实验结果表明无烟煤的孔隙主要以微孔为主,孔隙类型主要为狭窄的缝形孔。深成变质作用无烟煤的孔隙结构要比区域岩浆热变质作用无烟煤的孔隙结构复杂且易发生瓦斯突出。

关键词: 无烟煤, 孔隙特征, 液氮吸附, 脱附回线, 瓦斯突出

Abstract: The pore characteristic of coal is an important factor to affect gas outburst. The low-temperature liquid nitrogen adsorption experiments of three different metamorphic causes anthracite were conducted and the pore characteristics were analyzed. A new type of cryogenic liquid nitrogen desorption loop is proposed. The experimental results show that the pore of anthracite is mainly microporous and the main pore type is narrow slit-shaped hole. The pore structure of plutonic metamorphism anthracite is more complex than the regional magmatic thermal metamorphism anthracite's and is prone to gas outburst.

Key words: Anthracite, Pore characteristic, Liquid nitrogen adsorption, Desorption loop, Gas outburst