煤层预裂爆破是以含瓦斯煤体为对象,则煤体与瓦斯的气固耦合关系会影响到爆破裂隙的扩展,并进一步影响到煤层瓦斯的抽放效果,则在煤层深孔预裂爆破研究中,应重点研究含瓦斯煤体裂隙的扩展机理。在本案,笔者结合相关知识,浅析煤层深孔预裂爆破裂隙的扩展机理与运用。 Seam pre-splitting blasting is based on gas-bearing coal, the relationship between gas and solid of coal and gas will affect the expansion of blasting fractures and further affect the gas drainage effect of coal seam. In the research, the expansion mechanism of fissures in coal-bearing gas should be emphatically studied. In this case, the author combined with relevant knowledge, analysis of deep hole pre-cracking blasting coal seam expansion mechanism and application.