摘要
根据工程实例建立起数值模型,利用数值分析方法研究钻井深度是否对井壁的稳定性构成影响。结果表明,随着钻井深度的增加,井壁的最终位移状况没有发生明显改变。井壁的稳定性与冲积层中土的性质密切相关,砂土层的井帮内易出现一定的塑性区域,稳定性较差。
The paper establishes a numerical model according to the engineering case,and researches the impact of the drilling depth on the stability of the shaft wall with numerical analysis method.The result shows that the ultimate displacement status of the sidewall does not obviously change with the increase of the drilling depth.The stability of the shaft wall is closely related to the nature of the soil in alluvium,and certain plastic area appears easily in the wall in the sandy soil layer,the stability of which is often worse.
出处
《中国煤炭》
北大核心
2012年第10期38-41,共4页
China Coal
基金
国家重大基础研究项目(973计划)(2010CB226803)
国家科技支撑计划(2008BAB33B03)
关键词
深厚冲积层
钻井法
钻井深度
井壁稳定性
数值模拟
thick alluvium
drilling method
drilling depth
stability of shaft wall
numerical simulation
