Title: Numerical simulation study on the movement law of gas in fractured space during coal mining

Authors: Huaiwei Wang; Guang Shi

Addresses: Jinneng Holding Coal Industry Group Shenghouyuan Coal Industry Co., Ltd., Shuozhou 036000, China ' Shenyang Research Institute, China Coal Technology and Engineering Group Corp, Fushun 113000, China; State Key Laboratory of Coal Mine Safety Technology, Fushun 113000, China

Abstract: In order to study the gas movement law in fractured space of coal mining, 3D modelling software Solidworks was used to build a model, which subsequently was imported into COMSOL to simulate the gas distribution in the fractured space of mining. The findings showed that gas distribution surrounded the intake airway in the form of a fan, and the gas was removed by the fresh airflow, resulting in a gas concentration of only 0.1 mol/m³. In areas far away from the working face, the gas concentration held steady at the initial value (0.8 mol/m³). The gas concentration near the air outlet and the high-level drainage outlet was largely unaffected by the initial concentration, which was roughly proportionate to the gas concentration in the edge area of the affected area. It was demonstrated that decreasing the gas concentration in the fringe area can be achieved by increasing the inlet air volume.

Keywords: fractured space of mining; fracture evolution; gas extraction; numerical simulation.

DOI: 10.1504/IJMME.2024.140074

International Journal of Mining and Mineral Engineering, 2024 Vol.15 No.2, pp.131 - 146

Received: 11 Sep 2023
Accepted: 11 Apr 2024
Published online: 19 Jul 2024 *

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