为解决高压空气爆破技术在实施过程中爆破参数不准确、操作程序不规范的问题,采用理论研究与现场试验相结合的研究方法,对高压空气爆破致裂增透工艺进行了研究,得出了以钻孔孔径、爆破压力、爆破孔间距和爆破冲击次数为主的高压空气爆破参数,制定了选址、钻孔施工、系统组装、爆破筒置入、封孔、起爆等6步高压空气爆破致裂增透工艺,实现了爆破增透工艺的流程化、完整化和标准化.煤层高压空气爆破致裂增透工艺现场验证结果表明:高压空气爆破致裂增透工艺能够适用于井下操作,爆破压力选择50 MPa、爆破孔与抽采孔孔径选择94 mm、单孔爆破次数2～3次时,致裂效果明显,大幅增强了煤层的透气性,提高了煤层瓦斯的涌出量与抽采量,改善了煤层瓦斯抽采效果.%In order to solve the inaccurate blasting parameters and abnormal operation procedure problems occurred in the implementation process of the high pressure air blasting technology,a theatrical study and a site experiment combined study method were applied to study the fracturing and permeability improved technology with the high pressure air blasting.The high pressure air blasting parameters mainly with the borehole diameter,blasting pressure,space between the blasting boreholes and blasting impact times were obtained.The fracturing and permeability improved technology was set up,including the six steps of the location selection,drilling operation,system assembly,blasting cartridge placement,borehole sealing and detonation.The processing,integration and standard of the blasting and permeability improved technology were realized.The site experiment results of the seam high pressure air blasting fracturing and permeability improved technology showed that the fracturing and permeability improved technology with the high pressure air blasting could be suitably applied to the underground mine operation,the blasting pressure could be selected as 50 MPa,the diameter of the blasting borehole and the gas drainage borehole could be selected as 94 mm and the blasting times per single borehole was 2～3 times.The fracturing effect was obvious,the permeability of the seam was highly enhanced,the gas emission volume and gas drainage volume of the seam were improved and the seam gas drainage effect was improved.
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