煤矿安全2017，Vol.48Issue(5)：84-88,5.DOI:10.13347/j.cnki.mkaq.2017.05.023
高突矿井深孔预裂爆破瓦斯“零”超限技术
Gas "Zero" Overrun Technique in High Gas Outburst Mine by Deep-hole Pre-splitting Blasting
摘要
Abstract
To meet the need of "zero" gas overrun in low permeability coal seam of high outburst coal mine,the influence radius of deep hole pre-splitting blasting is studied by theoretical calculation and field test.Through the field gas extraction flow and concentration monitoring,we analyze permeability improvement effect by deep hole pre-splitting blasting.The results show that the theory radius of crushing zone by deep hole pre-splitting blasting is up to 4.0 to 6.3 m,and the radius of crack area is up to 7.8 to 12.1 m,and the field test shows that deep hole pre-splitting blasting influence scope is more than 9 m;the drainage effect of blasting and permeability improvement is inversely proportional with the distance of blast hole distance;deep hole pre-splitting blasting technology can biggest increase the gas drainage pure flow of 9.27 times and the average increase of gas drainage pure flow 4.96 times;the application shows that deep hole pre-splitting blasting can improve the gas drainage efficiency.关键词
煤矿安全/低透气性煤层/深孔预裂爆破技术/瓦斯抽采/“零”超限Key words
coal mine safety/low permeability coal seam/deep hole pre-splitting blasting technique/gas drainage/zero overrun分类
矿业与冶金引用本文复制引用
彭世龙,饶孜,江浩,江向洋,白鑫..高突矿井深孔预裂爆破瓦斯“零”超限技术[J].煤矿安全,2017,48(5):84-88,5.基金项目
国家自然科学基金资助项目(51474258) （51474258）
重庆市研究生科研创新资助项目(CYB16031) （CYB16031）
