Boundary coupling model and solution technology of mine ventilation network and gob flow field

被引：0
|
作者：
Wu F. [1 ,2 ]
Gao Y. [1 ,2 ]
Chang X. [1 ,2 ]
机构：
[1] College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an
[2] Key Laboratory of Western Mine Exploitation and Hazard Prevention, Ministry of Education, Xi'an University of Science and Technology, Xi'an
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Coupling; Finite element method; Gob flow field; Mine ventilation network; Node pressure method; PARDISO;
D O I：
10.11817/j.issn.1672-7207.2020.08.027
中图分类号：
学科分类号：
摘要：
To describe the mechanism of the airflows in the airways and gob areas of underground coal mine, the boundary coupling model of mine ventilation network and gob flow field was established by adding the flux of the air leaked into gob to mine ventilation network. Based on the node pressure method for mine ventilation network and the finite element method for gob seepage field, an iterative solution process for the boundary coupling model of mine ventilation network and gob flow field was studied. The method of solving the nonlinear seepage model of dob and the related equations were analyzed based on the linear seepage model. The programming interface of PARDISO was studied to solve the large sparse linear system in the coupling model. A computer program of i-MVS was developed to implement the coupling model in VC++ and ObjectARX. Two illustrative examples were created to verify the validity and performance of the coupling model. The results show that the simulation of gob flow field needs the solution of mine ventilation network to provide pressure boundary conditions, and the solution of the new mine ventilation network needs the simulation results of gob flow field to provide the flow on the leakage boundary, which forms a mutually dependent coupling relationship. The new ventilation network in the coupling model is an unclosed network with boundary air flow of gob and can only be solved by the node pressure method of mine ventilation network. In the coupling model, the gob flow field is simulated with the ventilation network simultaneously resulting in its amount of calculation being several times of that of the common gob flow field simulation. The solver of PARDISO is efficient in solving the coupling model and the accuracy of coupling model is improved by 12% compared with that of the previous method. © 2020, Central South University Press. All right reserved.
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收藏
页码：2333 / 2342
页数：9
相关论文
共 24 条
  • [1] LI Zongxiang, Study of coupling of gas and spontaneous combustion in highly gassy and spontaneous combustion goafs, College of Resources and Environmental Engineering, pp. 1-2, (2007)
  • [2] XIA Tongqiang, ZHOU Fubao, WANG Xinxin, Et al., Controlling factors of symbiotic disaster between coal gas and spontaneous combustion in longwall mining gobs, Fuel, 182, pp. 886-896, (2016)
  • [3] YUAN Liming, SMITH A C., Numerical study on effects of coal properties on spontaneous heating in longwall gob areas, Fuel, 87, pp. 3409-3419, (2008)
  • [4] LIU Jian, JIA Jinzhang, ZHENG Dan, Fluid network theory, pp. 111-129, (2002)
  • [5] SHE Xiangyang, CHANG Xintan, SUN Yizhen, Optimization algorithm adjusting ventilation flow about Min ventilation networks based on two step way and genetic algorithm, Journal of Central South University (Science and Technology), 42, 9, pp. 2729-2736, (2011)
  • [6] WANG Deming, WANG Jun, ZHOU Fubao, Developed mine ventilation graphics system based on the object-oriented technologies, Journal of China Coal Society, 25, 5, pp. 510-513, (2000)
  • [7] WU Fengliang, GAO Jianan, CHANG Xintan, Et al., Symmetry property of Jacobian matrix of mine ventilation network and its parallel calculation model, Journal of China Coal Society, 41, 6, pp. 1454-1459, (2016)
  • [8] TANG Mingyun, DAI Guanglong, QIN Ruxiang, Et al., Numerical analysis of air-leakage law in goaf of fully mechanized face, Journal of Central South University(Science and Technology), 43, 4, pp. 1494-1498, (2012)
  • [9] LI Zongxiang, LIU Yuzhou, WU Qiang, Improved iterative algorithm for nonlinear seepage in flow field of caving goaf, Journal of Chongqing University(Natural Science Edition), 31, 2, pp. 186-190, (2008)
  • [10] TAN Bo, NIU Huiyong, HE Chaonan, Et al., Goaf coal spontaneous combustion temperature field theory and numerical analysis under mining conditions, Journal of Central South University(Science and Technology), 44, 1, pp. 381-387, (2013)
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