Volume 46 Issue 1
Feb.  2018
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LI Bo, SUN Donghui, WEI Jianping, ZHANG Lulu. Experimental study on the effect of gas pressure gradient on coal permeability[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(1): 35-40. DOI: 10.3969/j.issn.1001-1986.2018.01.006
Citation: LI Bo, SUN Donghui, WEI Jianping, ZHANG Lulu. Experimental study on the effect of gas pressure gradient on coal permeability[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(1): 35-40. DOI: 10.3969/j.issn.1001-1986.2018.01.006
shu

Experimental study on the effect of gas pressure gradient on coal permeability

  • 1. State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), Jiaozuo 454000, China;

  • 2. Hebei State Key Laboratory of Mine Disaster Prevention, North China Institute of Science and Technology, Langfang 065201, China;

  • 3. State and Local Joint Engineering Laboratory for Gas Drainage & Ground Control of Deep Mines, Henan Polytechnic University, Jiaozuo 454003 China;

  • 4. Collaborative Innovation Center of Coal Work Safety, Henan Province, Henan Polytechnic University, Jiaozuo 454000, China

Funds: 

The National Science Foundation for Young Scholars of the National Natural Science Foundation of China(51604096)

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  • Received Date: December 12, 2016
  • Published Date: February 24, 2018
    Graphical Abstract
    • Abstract
  • In order to study the relationship between coal permeability and gas pressure gradient, a mathematical model of coal permeability and gas pressure gradient is established in consideration of the coal body adsorption deformation, and the seepage experiment was carried out under the condition of constant temperature. The seepage experiment of coal samples were carried out under condition of different adsorption equilibrium pressures with the same pressure gradient and the same adsorption equilibrium pressure with different pressure gradients. Research results show that:Under the condition of lower pore pressure, the permeability of coal decreases with the increase of adsorption equilibrium pressure; the dynamic evolution model of permeability well describes the gas flow pattern in the coal seam gas drainage process. The research results can provide some theoretical support for the coal mine gas control and drainage work, which has certain guiding and practical significance.
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    • References (18)
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