在分析煤层井壁失稳机理的基础上，对影响煤层井壁失稳的因素进行了逐一剖析，提出了一整套煤层安全钻进的技术措施。
Based on the analysis of mechanism of wellbore unstability, a series of drilling technical measures in coal beds are put forward.
为研究井壁失稳的机理奠定了理论基础，并为研究井壁稳定技术对策提供了基础数据。
These researches settled basic theory of wellbore instability research, and provided basic data to research technology countermeasures of wellbore stability.
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