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- high methane coal seam 高瓦斯煤层
- The equation for methane storage and migration in compressible coal seam with double pores and the numerical analogue method were set up. 建立了双重孔隙、可压密煤层甲烷储运方程和数值模拟方法，模拟结果表明，解吸时间控制吸附甲烷的涌出。
- Based on the characteristics of the pressure declining, desorption, diffusion and fluid flow in the process of coalbed methane from matrix of coal seam. 针对煤层气产出过程中的降压、解吸、扩散、渗流等特点，应用非稳态解吸模型；
- At the same time, methane effusing from the coal seam being worked increases, and the emphases of methane control could be put on the methane effusing from coal seam being worked. 而大采长综放工作面本煤层瓦斯涌出量增大，则需要增加通风量或者采用新的通风方式。
- Is the only production of high methane content of cyano-dithio enterprises. 是国内唯一生产高含量二硫氰基甲烷的企业。
- Under gassy coal seam condition, the full-heading development is employed.Because of the fast heading a high rate of gas emission arises. 在瓦斯含量较大的煤层采用综掘掘进巷道，由于掘进速度快，出现了瓦斯涌出量过大的现象。
- The relationships between the permeability of the methane gas in coal seam and surface fractal dimension and tortuosity fractal dimension are proposed based on fractal theory and Darcy Law. 基于分形理论和达西定律,研究了孔隙的弯曲分形维数和表面积分形维数与瓦斯渗透率参数之间的关系;
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Biologists have several reasons to suspect that such high methane levels could have been maintained. 生物学家有千百种理由，猜测地球上曾维持著如此大量的甲烷。
- A good brand and marketing advantage: The company now has developed the mine Jurassic coal seam produced with a low ash, high heat and other significant advantages. 良好的品牌和市场优势:公司目前拥有的矿井所开发的侏罗系煤层出产的煤炭具有低灰、高发热量等显著优点。
- As we know,CO_2 has a higher adsorbability than CH_4.If CO_2 is injected into coal seam,CH_4 can be replaced by CO_2.By using this technology,we can develop the deeply buried coal bed methane in most of our coal basins. CO2的吸附能力是CH4的4倍以上,如果把CO2通过钻井注入到深部煤层中,由于其吸附能力的差异,CH4会被优先置换出来,利用该技术一方面实现封存CO2的目的,同时还能够开发深部CH4。 这种置换技术在我国很多含煤盆地具有广阔的应用前景。
- Our detailed technical and economic analyses indicate that steam methane reforming (SMR) is the lowest cost source of hydrogen even at relatively high methane values. 通过详尽的技术和经济分析，我们发现即使是在甲烷价格相对较高的情况下，蒸汽甲烷转化（SMR）仍是成本最低的氢气来源。
- This paper makes a brief introduction of the basic method of determining the content of coal seam methane and the basic processing to determine the content of coal seam methone by analytical method. 本文简要介绍了测定煤层瓦斯含量的基本方法和解析法测定瓦斯含量的基本程序。
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- It is considered that the high methane flux is most probably caused by the occurrence of gas hydrate deposit below the seafloor in the northern slope of South China Sea. 这种高甲烷通量很可能是由下伏的天然气水合物所引起的，并暗示着该区下伏海底可能有天然气水合物沉积层赋存。
- 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。
- Abstract: The sulfate-methane interface is an important biogeochemistry identification interface for the areas with high methane flux and containing gas hydrate. 文章摘要: 硫酸盐-甲烷界面在富甲烷和含天然气水合物的海洋沉积区已经成为一个重要的生物地球化学识别边界。
- This experiment bases on different permeability in different directions of coal seam cleats.To arrange methane drainage direction the directions vertical and parallel to face cleat are adopted. 根据煤层割理渗透率的各向异性,采用垂直面割理和平行面割理两个方向布置钻孔抽放煤层气。
- The testing results of working face coal samples and roof impact tendency indicated that the coal seam belongs to high impact tendency and has pressure bumping possibility. 工作面煤样和顶板冲击倾向性测试结果表明,该煤层属于高冲击倾向性煤层,具有发生冲击矿压的能力。
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
