煤层的例句（煤层在句子中的用法）

• Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律.
• Coal Mine, its coal seam is easily spontaneous fire. 大雁二矿煤种为褐煤, 属易自燃发火煤层.
• This seam of coal reposes on a layer of clay. 这个煤层处于一层黏土岩之上.
• Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起.
• On a global scale, there are many coalfields suffered from spontaneous combustion of coal seam problems. 在全球范围内, 许多煤田都存在煤层自燃问题.
• There are relationships between absorption and proximate analyses, maceral analyses and ultimate analyses. 煤的吸附量与煤层的工业分析 、 显微煤岩分析、元素分析之间有一定的关系.
• Therefore, the conventional gas content measurement is invalid to lignite. 因此, 传统的煤层气含量确定方法不适用于褐煤.
• The authors used the Analytic Hierarchy Process ( AHP ) in the researches of coal seam floor water - irruption. 将系统工程中的层次 分析法 引入煤层底板突水的研究中.
• Finally hydromining method, an inareawere found through comparison between various mining methods. 通过多种采煤方法的试验 、 比较后,找到了一种对复杂煤层适应性较强的采煤方法——水力采煤方法.
• The method of gas drainagecoal seam gas drainage , near coal gas drainage , and goaf gas drainage. 瓦斯抽放的方法有本煤层抽放 、 邻近层抽放和采空区抽放.
• The crack in the coal seam is divided into two kinds: endogenic crack and exogenous crack. 煤层中的裂隙分两种,即外生裂隙和内生裂隙.
• The degree of carbonization of coal depends on the temperature. 煤层的炭化程度取决于温度.
• The average UK coal seam is one metre thick. 英国煤层的平均厚度为 1 米。