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- The result shows that the recovery condition of the CBM well will change with the change of the recovery system, and the permeability of coal reservoirs will also change. 研究结果表明，煤层气井工作制度的变化会引起煤层气井采动状况发生变化，导致煤储层渗透率产生波动。
- An inversive research method was proposed through analyzing the complicated changing features of permeability of coal seam and the problems existing in actual measurement. 分析了煤层渗透率的复杂变化特点和实际测量上存在的问题，提出其反演方法。
- The results show that PSW can increase pore volume of coal and can enhance permeability of coalbed methane (CBM) in coal. 结果表明 ,功率声波能够增加煤的孔隙体积 ,提高甲烷在煤层中的渗透率 ;
- Seeing from the petrophysics characters of coal reservoirs that formed in different deposit environments, the permeability of coal reservoirs are much better in deltaic deposit. 通过对含煤岩系沉积特征和古生物标志分析指出，该区含煤岩系是在稳定的地台构造背景上发育的一套海湾潮坪-三角洲充填沉积，从不同沉积环境条件下形成的煤储层岩石物理的特征看，三角洲沉积环境条件下形成的煤储层渗透性比较好。
- By similarity simulation experiment, we analysis the mining-induced fracture distribution and permeability of coal and rock mass near protective layer mined by speckle method. 阐述了含瓦斯煤的力学特性：通过相似模拟实验，用散斑法对保护层开采过程中来动裂隙分布规律及煤岩体的渗透性进行了分析。
- The coefficient of permeability of coal massgas attenuates with increase of volume stress and varies as parabola with porous pressure.The crtical pressnre is difinedas the extreme value of parabola. 得出了煤体瓦斯渗透系数随体积应力增加而衰减，随孔隙压呈抛物线型变化。
- The porosity and permeability of coal-bearing strata have important influen ce to the exhaust and mining of coal bed gas , but the production of coal bed gas is prec ondition of its richen. 煤系地层孔隙性和渗透率对煤层气的抽放、排采具有重要影响,但煤层气的生成却是其富集的先决条件。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- Electric Field Response of Gas Permeability of Coal 煤体瓦斯渗透性的电场响应研究
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- We had a big delivery of coal today. 今天我们收到大批订购的煤。
- The country is short of known deposits of coal. 这个国家缺少已知的煤矿矿床。
- Two methods are used to evaluate the permeability of cores. 有两种方法可用来测量岩芯的渗透率。
- An inexhaustible supply of coal. 用之不竭的煤炭供应
- The permeability of saline soils is studied in laboratory. 摘要对含盐土的渗透系数进行了室内试验研究。
- To increase the vapor permeability of film products. 赋予薄膜制品透气性。
- China has a wealth of coal, iron and other minerals. 中国有丰富的煤、铁和其它矿产资源。
- The oven holds sufficient heat to fire up a fresh charge of coal. 炉里有足够的热量使新加进的煤燃烧起来。
- We are talking about the ignitability of coal. 我们在谈论有关煤炭之可燃性。
