爆破参数对于增透、消除瓦斯突出、提高瓦斯抽采效果具有重要意义,基于数学计算的方法,采用计算机数值模拟对爆破前、多钻孔、不同爆破距离下的塑性区进行了研究,并进行了现场应用分析。研究结果表明,CO_2爆破前岩层几乎没有裂隙产生,原生裂隙发育度低;爆破后煤层透气性系数是爆破前的40倍,爆破后钻孔瓦斯抽采浓度平均提高了5.02倍。 Blasting parameters are of great significance for enhancing seepage, eliminating gas outburst and improving gas drainage effect. Based on mathematical calculation, the plastic zone before blasting, multiple drilling and blasting distances are studied by computer numerical simulation and carried out Field application analysis. The results show that there is almost no fissure in the rock before CO_2 blasting, and the development of primary fissures is low. The gas permeability coefficient after blasting is 40 times that before blasting, and the average gas drainage concentration after drilling is increased by 5.02 times on average.