摘要
准确的确定瓦斯抽采有效半径可使预抽钻孔的布置更合理、更有针对性,达到瓦斯抽采无盲区,同时也可以杜绝不必要的人力、物力和财力,加快采掘速度。针对二1煤层瓦斯含量较大而瓦斯压力较小的特点,采用基于瓦斯含量的相对瓦斯压力指标法,选择合理的残余瓦斯含量,对建业煤矿二1煤层的瓦斯有效抽采半径进行测定。确定建业煤矿采用孔径为75mm,抽采时间为6个月,且抽采负压为13k Pa时,其有效抽采半径为3.23m。
Accurately determine the effective drainage radius of gas can make the layout of coal seam aramage borenole more reasonable and more targeted without blind spots, but also can eliminate unnecessary human, material and financial resources to accelerate the extraction speed. According to the characteristics of high gas content and relatively low pressure of 2 - 1 coal seam, the reasonable residual gas content is selected, and the gas effective extraction radius of Jianye coalmine is determined by relative pressure index method based on gas content. The effective drainage radius of Jianye coalmine is 3.23m when the borehole diameter is 75mm, the extraction time is 6 months and the negative pressure is 13kPa.
出处
《内蒙古煤炭经济》
2017年第12期143-146,共4页
Inner Mongolia Coal Economy
关键词
有效抽采半径
瓦斯含量
相对瓦斯压力指标法
Effective Drainage Radius
Gas content
relative gas pressure index method
