Research on Anti-Reflection Technology of Coal Seam by Hydraulic Fracturing

As one of the key technologies of coal mine gas extraction and coalbed methane development in China, the anti-reflection technology of hydraulic fracturing coal seam is of great significance for improving the gas extraction amount of low permeability coal seam, reducing the risk of coal outburst, and promoting the effective mining of coalbed methane. By injecting high pressure water into the coal seam, the technology uses the pressure transmission of water to form a crack network in the coal seam. These cracks not only increase the permeability of the coal seam, so that the gas in the coal seam can flow more smoothly, but also communicate the natural cracks in the coal seam, and further improve the desorption and transport efficiency of gas. The application effect of hydraulic fracturing technology is remarkable. In some coal mines, through the implementation of hydraulic fracturing technology, the overall pressure relief and gas permeability of coal body are greatly improved, gas is released, and the total amount of extracted gas is significantly increased, which promotes the effective mining and utilization of coalbed gas. As a kind of unconventional natural gas resources, coalbed methane has great development potential. As a gas extraction and coalbed methane development technology with broad application prospects, hydraulic fracturing coal seam anti-reflection technology is of great significance for ensuring coal mine production safety, reducing gas accident incidence and promoting the effective exploitation and utilization of coalbed methane.