摘要
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。·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．
Abstract. Western China, where the strata of Cre- taceous have been widely distributed, has become China＇s important coal producing area because of the large amount of coal resources. The frozen wall temperature field in Cretaceous soft rock stra ta is not clear, which brings some difficulties to the design and construction of freezing shaft sink- ing. The thermal physical parameters distribution, mechanical properties of the frozen soft rock and freezing and thawing rule of deep frozen wall in Cretaceous strata are able to gain by means ofmodern technical means, such as field measure- ment, laboratory test, numerical simulation and so on. Derived from the monitored freezing point and freezing temperature field, it is revealed that con ductivity value of the frozen soft rock in Cretaceous strata is generally in 3. 328-3. 465 W m 1 - K 1. In-situ measurements show that the time ra- tios of thawing-freezing in Cretaceous strata are u- sually between 1.0 and 1.2. These results will be useful for design and construction of freezing shaft sinking in Cretaceous strata in western China.
出处
《冰川冻土》
CSCD
北大核心
2013年第5期1232-1236,共5页
Journal of Glaciology and Geocryology
基金
国家自然科学基金项目(51271071)资助
关键词
现场实测
数值模拟
冻结法凿井
白垩系地层
冻融规律
in-situ measurement
numerical simulation
freeze sinking
Cretaceous strata
law of freezing thawing
