| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Modified LBM Model for Simulating Gas Seepage in Fissured Coal Considering Klinkenberg Effects and Adsorbability-Desorbability |
| TAN Yun-Liang, TENG Gui-Rong, ZHANG Ze |
| Mine Disaster Prevention and Control Key Laboratory of Education Ministry, Shandong University of Science and Technology, Qingdao 266510 |
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| Cite this article: |
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TAN Yun-Liang, TENG Gui-Rong, ZHANG Ze 2010 Chin. Phys. Lett. 27 014701 |
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Abstract A modified Lattice-Boltzmann method is proposed by considering the Klinkenberg effect and adsorbability-desorbability for the purpose of simulating methane gas seepage in fissured coal. The results show that the Klinkenberg effect has a little influence on methane gas seepage in fissured coal, so it can be neglected in engineering computations for simplicity. If both the Klinkenberg effect and the adsorbability-desorbability are considered, the Klinkenberg influence on gas pressure decreases as the Darcy coefficient increases. It is found by gas drainage simulations that near a drainage hole, the effect of adsorption and desorption cannot be neglected, and the location of the drainage hole has a great influence on drainage efficient λ when the hole is just located at the mid-zone of the coal seam, λ is 0.691808; when the hole is excursion down to 1.0m from the mid-zone of coal seam, λ decreases to 0.668631; when the hole is excursion up or down to 2.0m from the mid-zone of coal seam, λ decreases to 0.632917. The simulations supply an effective approach for optimizing the gas drainage hole location.
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47.10.-g
05.20.Jj
05.10.-a
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Received: 17 August 2009
Published: 30 December 2009
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| PACS: |
47.10.-g
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(General theory in fluid dynamics)
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05.20.Jj
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(Statistical mechanics of classical fluids)
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05.10.-a
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(Computational methods in statistical physics and nonlinear dynamics)
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