中文摘要：

煤层气开采技术专利中蕴藏着大量反映开采技术领域发展情况的有效信息，通过系统挖掘，可以高效、准确地顸测该领域技术发展趋势。在嵌入美国的专利信息作为对比数据的基础上构建了一套系统专利挖掘路径，通过挖掘对比两国专利的历年申请情况、专利IPC信息及技术生命周期剖析了我国在煤层气开采领域的技术发展现状；同时，对专利文本进一步挖掘聚类，通过提取核心技术关键词，绘制各核心技术领域的发展趋势图，以准确预测我国在煤层气开采技术领域的未来研究重点。

英文摘要：

The CBM mining patent contains a large number of effective information which reflects the development of mining technology. Through systematically mining, we can predict the technology trend in this field efficiently and accurately. This article added the United States patent information as comparative data on the basis of the path to build a system of patent mining, and analyzed the current situation of the CBM mining technology in China through contrasting the patent application information, IPC information and technology life cycle between the two countries. Further more, by extracting core technology and drawing the development trend of the core technology, this ar- ticle accurately predicts the future research emphasis in the field of CBM mining technology in China.