Numerical Simulation and Optimization for Double Pore Gas Drainage in Low-Permeability Fissured Coal Based on Lattice Boltzmann Method

DOI

10.2991/coal-18.2018.51How to use a DOI?

Keywords

gas drainage, double pores, lattice boltzmann method, simulation

Abstract

In order to simulate gas drainage in low-permeability fissured coal considering double pores arranged symmetrically or asymmetrically, a dynamic model which can use a large pressure gradient is constructed based on Lattice Boltzmann Method (LBM). Different two pores drainage messures are studied respectively, including the conditions of the pores positions are asymmetrical or asymmetrical and the conditions of two pores depths are the same or not . Through analysis of the distributions of gas pressure and gas seepage flow in fissured coal at the steady gas seepage the reseach shows that:(1) With the increment of the drainage double pores depths arranged symmetrically or asymmetrically, the gas pressure reduce and the gas velocity qukien when the arrangement double pores asymmetrically with the different depths.(2) The deviation of the two pores arrangement to the centre in gas seepage field is large to be not recommanded attributing to the asymmetrical arrangement with large pores depths.(3)Under the condition of arrangement double pores symmetrically with the different depths, there is also a peak gas pressure in the gas seepage fields to be not effectively.(4)The gas drainage effect is the best when the pores are symmetrically arranged with the same depth,and with the increase of the number of pores, the drainage effect is better to be recommended.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ming Gao
AU  - Bin Fang
AU  - Zhijie Wen
AU  - Tao Yang
AU  - Xiaotong Li
AU  - Yujun Zuo
PY  - 2018/10
DA  - 2018/10
TI  - Numerical Simulation and Optimization for Double Pore Gas Drainage in Low-Permeability Fissured Coal Based on Lattice Boltzmann Method
BT  - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
PB  - Atlantis Press
SP  - 281
EP  - 286
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-18.2018.51
DO  - 10.2991/coal-18.2018.51
ID  - Gao2018/10
ER  -