铁法矿区地面钻孔抽放采空区瓦斯技术及应用  

Technology of surface boreholes for drainage of goaf gases and application in Tiefa Mining area

作　　者：秦跃平[1] 姚有利[1] 刘长久[2] 

机构地区：[1]中国矿业大学资源与安全工程学院,北京100083 [2]铁法煤业集团公司,辽宁铁岭112700

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第1期5-8,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金重点资助项目(50134040);教育部科学技术研究重点基金项目项目(105021)

摘　　要：为了解决铁法矿区现有的6对高突矿井,煤层瓦斯含量大,煤层透气性系数低,瓦斯抽放难度大的问题,传统的瓦斯抽放方法难以满足长壁开采生产的要求。解决低透气性煤层瓦斯抽放问题的根本途径是增加煤层的透气性。采用地面钻孔法抽取采空区瓦斯,有效利用开采引起的缷压增加透气性。针对铁法矿区的地质条件和生产工艺特点,阐述了地面垂直钻孔法抽取采空区瓦斯的适用条件,钻孔参数的合理优化,地面钻孔抽放效果等。通过地面钻孔抽放瓦斯,不仅解决了低透气性煤层瓦斯抽放困难,高瓦斯涌出量对矿井安全生产造成威胁等难题,而且有效地利用了煤层气资源。Tiefa Caol Industry Group Company has 6 high gas mines. The permeability of coal seams is low and extraction is difficult. Traditional gas drainage techniques sometimes can＇t meet the requirements of methane drainage for a modem longwall operation. The alternative method to drill gas drainage holes is to drill boreholes from surface to the goaf area. Essential way of solving the gas drainage problem of low permeability coal seam is to increase coal seam permeability. Aiming at geologic conditions and production process in Tiafa Mining area, the application conditions of surface boreholes for drainage of goaf gases is discussed, boreholes parameters are optimized and its drainage effect is also discussed. Gas drainage by surface boreholes, which effectively utilizes decompression caused by mining to increase permeability, not only resolves the problems of gas drainage of coal seams of low permeability and gas emission influencing safety production, but also effectively utilizes coal-seam gas resource.

关 键 词：地面垂直钻孔 采空区 瓦斯抽放 低透气性 裂隙 

分 类 号：TD712[矿业工程—矿井通风与安全]