With the rapidly development of the text data, text mining have been an important study direction in data mining area.
随着文本数据的迅速增长，文本挖掘已经成为了数据挖掘领域的一个重要的研究方向。
This paper discusses the environmental geological problems resulted from the development of coal resources in the coal mining area in Pingdingshan city, He'nan Province.
分析了平顶山矿区煤炭资源开发带来的环境地质问题。
With the analysis on the pressurized mercury experiments, a research was done on the development conditions of the porosity and fissure systems in the seams of the coalfield in Qinan Mining Area.
从煤层气生成机制及其地质控制、煤储层孔隙结构与吸附/解吸行为、煤储层裂隙系统及其对渗透率的影响三个方面，有重点地总结了国外有关煤层气成因和煤储层物性研究的新进展。
With the analysis on the pressurized mercury experiments, a research was done on the development conditions of the porosity and fissure systems in the seams of the coalfield in Qinan Mining Area.
从煤层气生成机制及其地质控制、煤储层孔隙结构与吸附/解吸行为、煤储层裂隙系统及其对渗透率的影响三个方面，有重点地总结了国外有关煤层气成因和煤储层物性研究的新进展。
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