Gas emission law of multi-field coupling pressure relief in gangue filling mining site
Guo Shuming
Abstract：When the mining stress changes in the mining site,it will inevitably cause differences in the degree of coal unloading in the mining site,thereby altering the patterns of gas emission from the coal mass.Therefore,the law of pressure relief gas emission in filling mining areas was studied,and the influence of gangue filling rate on gas leakage was analyzed.Firstly,a multi-field coupling model con-sidering the creep of gangue was established,including the stress field,fracture field,and gas flow field.The Weber distribution was used to describe the heterogeneity of coal,the Burgers creep equation was used to describe the rheological properties of gangue filling,and Darcy's law and Fick's law were used to describe the seepage and diffusion process of gas.Secondly,using the on-site measured data from Dongqu Coal Mine,the model was fitted with parameters and reasonable simulation results were obtained.Finally,by compa-ring and analyzing the changes in gas emission volume and gas emission sources of this coal seam and adjacent coal seams under differ-ent gangue filling rates,theoretical reference and technical support are provided for gas control in filling mining sites.
Keywords：filling miningpressure relief gas emissiongangue filling ratemulti-field coupling model
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 106-113 )