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利用RFPA2D-Flow版本数值模拟软件对不同侧压系数和不同坚固性系数下煤层水力压裂的起裂压力和裂缝扩展延伸规律进行了模拟研究。最后结合现场工业试验验证水力压裂效果,结果表明:压裂后煤层瓦斯抽采流量和浓度明显增加,透气性显著提高。
The cracking pressure and crack extension and extension of hydraulic fracturing of coal seam under different lateral pressure coefficient and different solidity coefficient were simulated by RFPA2D-Flow version numerical simulation software. Finally, field test was used to verify the effect of hydraulic fracturing. The results show that the flow rate and concentration of gas drainage in coal seams increase obviously and the gas permeability increases obviously.