摘要
为了提高瓦斯抽采中钻孔布孔间距的合理性,将瓦斯流量作为考察指标,对豫西白坪矿二1煤层开展了顺层钻孔有效抽采半径的测试研究。结果表明:瓦斯流量法测定顺层钻孔的有效抽采半径是一种有效的方法,并确定了白坪矿采用89 mm的钻孔进行煤层瓦斯预抽,抽采3个月时,其有效抽采半径为1.5 m。
In order to improve the efficiency of gas drainage in low permeable coal seam and determine the reasonable drill hole space, a study on effective gas drainage radius of hole drilled along coal seam was conducted in Ⅱ1coal seam in Baiping Mine,which took gas flow as the investigation index. The results show that the gas flow method is an effective means,and we make sure that effective drainage radius of gas is 1. 5 m when the diameter of drainage boreholes is 89 mm after draining three months.
出处
《中州煤炭》
2014年第4期35-37,共3页
Zhongzhou Coal
基金
河南理工大学博士基金项目资助(B2011-068)
河南省教育厅自然科学研究计划项目(2009B62002)
关键词
瓦斯流量法
顺层钻孔
有效抽采半径
gas flow method
borehole drilled along seam
effective drainage radius
