摘要
区域瓦斯抽采中,顺层瓦斯抽采方法是一种广泛运用的预防煤与瓦斯突出的措施之一,为了确定屯兰煤矿顺层钻孔有效抽采半径,以2#、4#、8#、9#煤为研究对象,通过对各煤层的瓦斯压力及煤的灰分、水分、孔隙率、容重的测定,采用直接测定法测定了顺层钻孔的有效抽采半径.结果表明,屯兰煤矿各煤层钻孔瓦斯抽采时间为30 d^60 d是合理的,2#煤层抽采半径设计为2 m^4 m,8#煤层抽采半径设计为2m^4m,4#、9#煤层抽采半径设计为3m^5m.
In regional gas drainage,the method of bedding gas drainage is one of the widely used measures to prevent coal and gas outburst.In order to determine the effective drainage radius of bedding hole in Tunlan coal mine,the research object is 2#、4#、8#、9#coa.Through the measurement of gas pressure,ash content,moisture content,porosity and bulk density of each coal seam,the effective extraction radius of borehole along the seam is determined by direct measurement method.The results show that it is reasonable for Tunlan coal mine to have a gas drainage time of 30~60 days.The drainage radius of 2# coal seams is designed to be 2 m^4 m,8#coal seams is designed to be 2 m^4 m,and 4#、9#coal seams is designed to be 3 m^5 m.
作者
高俊奇
GAO Junqi(Ventilation Rrea of Tunlan Mine,Xishan Coal Electricity Co.,Ltd.,Gujiao Shanxi 030206,China)
出处
《山西化工》
2020年第1期66-69,共4页
Shanxi Chemical Industry
关键词
瓦斯抽采
顺层钻孔
有效抽采半径
gas drainage
drilling along the layer
effective drainage radius
