上邻近层卸压抽放钻孔布孔方式改进研究  

Research on Modified Hole Pattern for Pressure-relief Gas Drainage from Upper Adjacent Seam

作　　者：孙国文[1] 

机构地区：[1]重庆工程职业技术学院矿业与环境工程学院,重庆400037

出　　处：《矿业安全与环保》2013年第4期91-94,共4页Mining Safety & Environmental Protection

摘　　要：针对松藻煤矿保护层工作面回风巷钻场卸压瓦斯抽放钻孔布置不能满足瓦斯抽放需要的问题,对钻场卸压瓦斯抽放钻孔布孔方式进行改进,由双向扇形布孔改为沿工作面切割方向单向前倾式布孔。布孔方式改进后提高了钻场瓦斯抽放量,减少了工作面瓦斯超限现象,改进的布孔方式具有较好的实用性。To counter the problem that the pattern of gas-relieving drainage holes can＇t meet the needs of gas drainage in air-return way in the working face of the protective seam in Songzao Mine,improvement was carried out for the pattern of the gas-relieving drainage holes at the drilling site,the two-way fan-shaped hole pattern was changed into one-way forward-inclined hole pattern along the cutting direction of the face.The improvement of the gas drainage hole pattern raised the gas drainage volume at the drilling site and reduced the gas overrun phenomenon,so it has good practicability.

关 键 词：上邻近层 卸压瓦斯 抽放钻孔 布孔方式 改进 

分 类 号：TD712[矿业工程—矿井通风与安全]