Influence of Ground Stress on Coal Seam Gas Pressure and Gas Content
作者: Xuebo Zhang and Zhiwei Jia
刊名: Fluid Dynamics & Materials Processing, 2019, Vol.15 No.1 20 (1 2019), pp.53-61
来源数据库: Tech Science Press
关键词: Ground stressCoal seam porosityGas pressureGas contentStress concentration.
原始语种摘要: The influence of ground stress was quantitatively analyzed on coal seam gas pressure and gas content in this paper. Mining activities in coal mine can result in stress concentration in the coal (rock) body around the mining space, but porosity of the coal seam would not change too much. Therefore, gas pressure and gas content in the coal seam are slightly affected. Studies showed that the free gas was gradually transformed into adsorbed gas, and the gas adsorption volume was small, and then gas pressure increases roughly linearly when the porosity decreased because of stress influence. Additionaly, when porosity of coal seam reduced to 40%, the amount of adsorbed gas accounted for no more than 10% of coal seam gas content, and the increase of gas pressure did not exceed 15% of the...
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  • porosity 孔隙率
  • quantitatively 定量的
  • Ground 地面
  • concentration 浓度
  • pressure 压力
  • content 品位
  • adsorbed 被吸附的
  • stress 应力
  • influence 影响
  • exceed 超过