摘要
根据五阳煤矿7601综放工作面的开采时空条件,按立体网格状布置测点,对整个综放面瓦斯浓度进行了测量。测量分析结果显示工作面瓦斯主要来源是工作面煤壁,其大小取决于煤层原始瓦斯含量、煤层透气性、瓦斯放散初速度和瓦斯涌出衰减系数等;工作面上隅角附近瓦斯体积分数最高达到1%左右,而抽排风筒内瓦斯体积分数为0.8%左右,说明抽出式风机抽排瓦斯的效果十分显著。
According to the mining space conditions of the 7601 fully mechanized top coal caving mining face in Wuyang Mine and based on the 3D mesh located measured points, the gas content of the full mining face was measured. The measured and analysis results showed that the coal mining face gas mainly could come from the coal wall of the coal mining face. The gas quantity from the coal wall would be depended on the original gas content of the seam, seam permeability, gas emission initial velocity and gas emission reduction coefficient. The gas volume fraction degree near upward comer of the coal mining face was up to about 1% and the gas volume fraction in the ventilation tubing was about 0. 8%. The results of the gas drainage with the withdraw fan was obvious.
出处
《煤炭科学技术》
CAS
北大核心
2009年第4期34-36,共3页
Coal Science and Technology
关键词
综放工作面
瓦斯浓度分布
等值线
fully mechanized top coal caving mining face
gas content distribution
constant value line
