Abstract
FLUENT, a finite volume computational fluid dynamics code that solves the Navier-Stokes equations for both incompressible and compressible flows, has been used to simulate the spontaneous combustion behavior in ultra-close coal seam, variation of oxidation zone under different ventilation types, and mitigation effect due to grouting and inert gas injection in this chapter. The volume fraction of oxygen is taken as the indicator to divide the range of “three zones,” determine the width of oxidation zone, and analyze the status of spontaneous combustion in the gob under different operating conditions. Airflow field and high-risk upper and lower zones in gob are analyzed numerically for ultra-close coal seam mining. Width of oxidation range and width of high temperature range with U-type, U+L-type, and Y-type ventilation system are determined. According to the analysis of grouting spread behavior with different seam angles, optimal grouting plan has been made. “Three zones” variation affected by nitrogen injecting positions and quantities are also investigated in this chapter.
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Wang, X. (2020). Numerical Modeling of Self-Heating Event and Preventive Measures. In: Spontaneous Combustion of Coal. Springer, Cham. https://doi.org/10.1007/978-3-030-33691-2_5
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DOI: https://doi.org/10.1007/978-3-030-33691-2_5
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