辽宁工程技术大学学报（自然科学版）Issue(6)：754-758,5.DOI:10.3969/j.issn.1008-0562.2013.06.008
煤体钻孔瓦斯有效抽采半径判定技术
Technology for determining effective drainage radius of coal seam drill hole
摘要
Abstract
In order to measure the effective drainage radius of mining-coal bed accurately in low gas mine, a measure method which is based on gas drainage volume of ton coal is proposed. Based on the gas drainage negative exponential decay regularity, a gas drainage model is established. Then the ton coal gas drainage volume is calculated, and compared with the original gas content in coal seam, thus obtain residual gas quantity (Wc) and drainage efficiency (η), which is used to judge the effective drainage radius of borehole,only satisfying condition of {Wc≤8m3/t∩η≥30%}, effective drainage radius could be determined. The result shows that the effective drainage radius is increased as pre-drainage time prolonged, until limit. The drainage radius in different time was analyzed in coal mine, which provides accurate drainage parameters for gas drainage effectively, and the conclusion has practical application value.关键词
瓦斯/有效抽采半径/指标/吨煤抽采量/抽采率/瓦斯含量/瓦斯流量/ANSYSKey words
gas/effective drainage radius/index/drainage volume of ton coal/gas drainage efficiency/gas content/gas flow/ANSYS分类
矿业与冶金引用本文复制引用
魏国营,秦宾宾..煤体钻孔瓦斯有效抽采半径判定技术[J].辽宁工程技术大学学报（自然科学版）,2013,(6):754-758,5.基金项目
国家“十二五”科技重大专项课题基金资助项目（2011ZX05040-005）；河南理工大学博士基金资助项目 （）
