集贤煤矿本煤层深孔爆破增透瓦斯抽放关键技术

Key Technologies of Hole Blasting through Coal Seam Gas Drainage in Jixian Coal Mine

论述了深孔预裂爆破技术原理,并根据集贤矿实际煤岩赋存条件进行深孔爆破参数确定,即确定钻孔长度、钻孔直径、钻孔间距和封孔长度,并进行现场工业试验。实践表明,深孔预裂爆破技术解决了该矿低透气煤层本层瓦斯抽放率低的问题,保证了集贤煤矿安全高效生产。

This paper discusses the technical principle of blastings and in accordance with the actual coal mine Jixian occurrence hole blasting parameters to determine the conditions that determine the length of drill,drill diameter,drill spacing and sealing length,and on-site industry test.Practice shows that technical solutions Blasting low permeability coal mine gas drainage of the problem of low level to ensure the efficient production of coal mine safety Jixian.