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冰川冻土  2013 

白垩系地层深井冻结壁温度场分布规律

DOI: 10.7522/j.issn.1000-0240.2013.0139, PP. 1232-1236

Keywords: 现场实测,数值模拟,冻结法凿井,白垩系地层,冻融规律

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Abstract:

西部地区主要为白垩系软岩地层,煤炭资源储量大,成为我国重要产煤区.白垩系软岩地层冻结壁温度场分布规律尚不清楚,给白垩系地层冻结法凿井设计与施工带了一定的困难.通过现场实测、室内试验和数值模拟等手段,获得了白垩系地层冻结软岩热物理参数分布规律、力学特性及深井冻结壁冻融规律.测点冻结温度场反演白垩系冻结软岩导热系数值一般介于3.328~3.465W·m-1·K-1之间,现场实测表明白垩系地层融冻时间比一般为1.0~1.2之间.研究白垩系地层冻融规律,对指导我国西部地区白垩系地层冻结法凿井设计与施工具有重要的理论参考价值.

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