HU Weiyue1;LI Jing1;WANG Shouquan2(1.Xi'an Branch;

• 1:China Coal Research Institute
• 2:Xi'an 710054
• 3:China
• 4:2.Sichuan Coal Industry Group Limited Liability Company

Abstract：

The paper analyzed the flowing conditions of gas in coal-based pore and fractured medium,discussed the basic movement equation of gas flow and diffusion in the pore and fractured medium as well as the main influence factors,analysed the coal and gas outburst mechanism and its dynamic conditions.It was recognized that gas flowing is the preliminary condition of coal and gas outburst,the gas pressure gradient is the basic force of coal and gas outburst.Coal and gas outburst was closely related to the gas pressure gradient instead of gas pressure.The coal and gas outburst conditions are mainly determined by gas pressure gradient and coal shear stress.It is easier to form coal and gas outburst in fractured coal due to its low permeability and high gas flowing resistance.

Key Words： pore and fractured medium;gas flowing;pressure gradient;coal and gas outburst

Abstract:

Keywords:

Foundation: 国家重点基础研究发展计划(973计划)项目(2006CB202200)

Authors: HU Weiyue1;LI Jing1;WANG Shouquan2(1.Xi'an Branch;

References：

• [1]富向,王魁军,杨天鸿.构造煤的瓦斯散放特征[J].煤炭学报,2008,33(7):775-778.
• [2]韩军,张宏伟,霍丙杰.向斜构造煤与瓦斯突出机理探讨[J].煤炭学报,2008,33(8):908-911.
• [3]山东工学院.工程流体力学[M].北京:水利电力出版社,1984.