针对低透性高瓦斯煤层透气性差,瓦斯含量高,预抽采难度大、效率低等难题,研发出CO_2致裂器爆破增透技术,采用井下试验和数值模拟相结合的方法,研究发现:CO_2致裂器爆破煤层,会促使煤层产生大量裂隙,并使得原有裂隙得到扩展,从而达到提高煤层透气性的目的。 Aiming at the problems of poor gas permeability, high gas content, difficulty of pre-pumping and low efficiency for low-permeability and high-gas coal seam, an anti-penetration technique of CO_2 fracturing was developed. By the combination of downhole test and numerical simulation, The CO_2 fracturing device explodes the coal seam, which will cause a large number of fractures in the coal seam and expand the original fracture so as to improve the permeability of the coal seam.