1) coal seam with low gas permeability
低透性煤层
1.
Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production.
高瓦斯低透性煤层的瓦斯抽放,一直是煤矿安全生产过程中的重大技术难题。
2) the low gas permeability coal seam
低透气性煤层
1.
This paper based on the low gas permeability coal seam 416 stope working face of Tongchuan mineral bureau,we analyzed the mechanism of the hydraulic cutting seam to improve the gas permeability coal seam,by this study,it shows the hydraulic cutting seam technology is effectual measure and it is provided with nicer practically and capacious foreground.
文章以铜川矿务局陈家山煤矿低透气性416综放工作面为研究背景,深入研究了水力割缝增强煤层透气性的作用机理,试验表明了水力割缝的确是一种提高低透气性煤层瓦斯抽放的有效措施,并具有良好的实用性和广阔的推广前景。
3) low air permeability coal seam
低透气性煤层
1.
Using RFPA2D-Flow stereo-gasses coupled system to simulate the process of gas draiange in lower air permeability coal seam by loose blasting,it interprets that loose blasting is a effective ways to increase air permeability in low air permeability coal seam.
运用RFPA2D-Flow固气耦合系统模拟了松动爆破抽放低透气性煤层内瓦斯的过程,解释了爆破松动是增加低透气性煤层透气性的有效途径,本文对松动爆破前后抽放过程中煤层内瓦斯压力和瓦斯渗流场的变化规律进行了数值模拟对比,为进一步理解瓦斯抽放、松动爆破增透机理等提供理论基础和科学依据。
5) low permeability coal seam
低渗透煤层
1.
Testing study of methane drainage by bore and hydraulic-cutting seam from low permeability coal seam;
低渗透煤层钻孔与水力割缝瓦斯排放的实验研究
补充资料：透性
分子式：
CAS号：
性质：细胞质具有让物质通过质膜本身的性质，称为透性或通透性。
CAS号：
性质：细胞质具有让物质通过质膜本身的性质，称为透性或通透性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条