关键词: 低透煤层, 水力压裂, 增透技术, 瓦斯抽采

Abstract: In order to improve the gas drainage quantity from low permeability high outburst seam and to reach the outburst elimination target with gas drainage, Put forward the technology of hydraulic fracturing . Include using hydraulic equipment of large flow and high pressure, improving technology of fracturing drilling hole sealing and raising technology of hydraulic fracturing and permeability improved. The process of fracturing injection pressure is designed to process of promotion. The experiment investigation was conducted with application results of hydraulic pressurized cracking technology was analyzed. The test results show that the fracturing effect radius can reach 60m after implementation of hydraulic fracturing, when using the same pumping power equipment, unit of gas extraction of pure quantity increased average of 2.2 times compared with the original,. increased average of 1.3 times compared with constant fracturing The coal seam permeability coefficient increased by 6 times, completing the purposes of improving the gas extraction efficiency and rapid outburst elimination .