摘要
为了研究高瓦斯低透气性煤层穿层深孔爆破增透效果,以淮南丁集煤矿13-1煤层为工程背景,提出了煤-岩界面装药穿层爆破的方法,设计了爆破增透的实物模型,运用超动态测试系统分别实测了模型装药爆炸后煤与岩各层的爆炸波信号,观察了裂隙的分布情况。结果表明:应力波在界面处反射拉伸使煤-岩界面分离,岩层中裂隙与瓦斯抽采孔贯通,形成了立体网状的瓦斯通道,有利于瓦斯抽采,该技术为高瓦斯低透气性煤层穿层爆破增透提供了重要的理论依据和实用价值。
To study the permeability enhancement effect of strata penetration deep - hole blasting in the high gas content and low permeability coal seams, taking No. 13 - 1 seam in Huainan Dingji mine as the engineering background, a strata penetration blasting method with coal -rock interface charging was proposed. The explosion models for testing the effect of increased permeability were designed. When the charge exploded, the signal of dynamic strain between coal seam and rock formation were tested with the ultra - dynamic testing system and then crack distribution was observed. The results show that, stress waves reflected and stretched at the interface that leaded to coal - rock interface separation and interconneetion of cracks and gas holes, and the formation of a three - dimensional reticulated gas drainage channels system. The changes were conducive to gas drainage, and the application effect was significant.
出处
《煤炭工程》
北大核心
2015年第12期48-51,共4页
Coal Engineering
基金
安徽省高等学校省级自然科学基金资助项目(KJ2013A102)
关键词
穿层深孔爆破
模型爆破试验
煤-岩界面装药
瓦斯通道
装药技术
strata penetration deep- hole blasting
explosion model testing
coal- rock interface charging
gas drainagechannels
charge technology
