Research on Enhancing Underground Coal Seam Gas Drainage Effect through Surface Fracturing Drilling

Abstract

In response to the characteristics of high gas content and low permeability coal seams in Coal Mine, a systematic study was conducted to improve the underground coal seam gas drainage effect using surface fracturing drilling technology. The focus was on examining the impact of surface fracturing drilling on various indicators before and after fracturing of the underground coal seam, including permeability, gas pressure and content, gas drainage concentration, drainage volume and pure volume, gas emission rate, and the K1 value. A quantitative analysis was carried out to investigate the influence of surface fracturing drilling on the underground coal seam gas drainage effect. The results indicate that surface fracturing drilling significantly enhances the permeability of coal seams, effectively reduces gas pressure and content, increases gas drainage concentration and pure volume, decreases gas emission rate, and mitigates the risk of coal and gas outbursts.