贾进章;郭建;

• 1:辽宁工程技术大学安全科学与工程研究院
• 2:辽宁工程技术大学安全科学与工程学院
• 3:矿山热动力灾害与防治教育部重点实验室

摘要(Abstract)：

为解决"U"型通风存在的上隅角瓦斯积聚及采空区瓦斯涌出等问题,研究利用大直径钻孔(φ550 mm)抽采采空区瓦斯技术,该技术通过低负压、高流量对采空区瓦斯进行抽采,从本质上改变采空区漏风流流场,从而降低上隅角瓦斯浓度及减少采空区瓦斯涌出.分析了大直径钻孔抽采上隅角瓦斯原理,从钻孔及护管参数、护管施工技术及参数、封孔工艺三方面研究了大直径钻孔抽采技术,并在中能矿2201工作面应用以抽采采空区瓦斯,测试确定了瓦斯钻孔抽采浓度随着工作面与钻孔的距离的变化关系,确定了最佳钻孔间距为20 m,开孔高度1.2 m可将上隅角瓦斯体积分数控制在0.28%～0.79%,钻孔交替时上隅角瓦斯体积分数控制在0.8%之内.

关键词(KeyWords)： 采空区瓦斯;上隅角;大直径钻孔;瓦斯抽采;负压

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51374121）

作者(Authors): 贾进章;郭建;

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