泊江海子矿白垩纪地层冻结软岩力学特性试验

doi:10.13278/j.cnki.jjuese.201603201

吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (3): 798-804.doi: 10.13278/j.cnki.jjuese.201603201

泊江海子矿白垩纪地层冻结软岩力学特性试验

朱杰¹, 徐颖¹, 李栋伟¹, 陈军浩²

1. 安徽理工大学土木建筑学院, 安徽淮南 232001;
2. 福建工程学院土木工程学院, 福州 350118

收稿日期:2015-09-03 出版日期:2016-05-26 发布日期:2016-05-26
作者简介:朱杰(1981),男,副教授,博士,主要从事冻土工程和岩石力学研究方面的工作,Email:zhujie_66@126.com
基金资助:
国家自然科学基金项目（51504070）；国家自然科学基金青年项目（41301074，41271071）；安徽省科技攻关计划项目（1501041123）

Experimental Study on Mechanical Properties of Frozen Soft Rock of Cretaceous Formation in Bojianghaizi Mine

Zhu Jie¹, Xu Ying¹, Li Dongwei¹, Chen Junhao²

1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China;
2. College of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China

Received:2015-09-03 Online:2016-05-26 Published:2016-05-26
Supported by:
Supported by the National Natural Science Foundation of China (51504070), the National Natural Science Foundation of China(41301074, 41271071) and the Key Scientific and Technical Program of Anhui Province (1501041123)

摘要/Abstract

摘要：

针对泊江海子矿白垩纪地层中的砂岩和泥岩，分别进行了不同温度（-20~20℃）下的三轴压缩试验。试验结果表明：在-20~20℃之间，白垩纪地层软岩的峰值强度和弹性模量均随温度的降低及围压的升高而增加，其中中砂岩的峰值强度随温度的变化程度明显大于泥岩，即其对温度的敏感性更高；而岩石峰值处的轴向应变则随温度的下降而减小；另外，随着温度降低，两种岩石的峰值内摩擦角和黏聚力均有一定程度的提高，并且抗剪强度指标的增加主要集中在黏聚力上。通过对试验结果的整理和分析，掌握了白垩纪地层软岩在不同低温和围压下的力学特性和规律，为西部地区矿井冻结法设计与施工提供了可靠的依据。

关键词: 白垩纪地层, 低温, 冻结软岩, 峰值强度

Abstract:

Triaxial compression tests at different temperatures(-20~20℃) were carried out for medium sandstone and mudstone of cretaceous formation in Bojianghaizi mine.The results show that between -20~20℃ the peak strength and modulus of elasticity of the soft rock increase with temperature decreasing and confining pressure rising. The variation degree of peak strength of medium sandstone is obviously higher than that of mudstone, that is to say the former has higher sensitivity to temperature. At the same time, the peak axial strain declines with temperature decreasing.Furthermore, the peak angle of internal friction and cohesion increase with the drop of temperature, and the increase of the shear strength index mainly reflects in the cohesion.Through the analysis of experiment results, mechanical properties and law of cretaceous frozen soft rock in the different confining pressures and low temperatures are recognized, which can provide reliable basis for the design and construction of mine with freezing method in the western region.

Key words: Cretaceous Formation, low temperature, frozen soft rock, peak strength

中图分类号:

P642.14

朱杰, 徐颖, 李栋伟, 陈军浩. 泊江海子矿白垩纪地层冻结软岩力学特性试验[J]. 吉林大学学报(地球科学版), 2016, 46(3): 798-804.

Zhu Jie, Xu Ying, Li Dongwei, Chen Junhao. Experimental Study on Mechanical Properties of Frozen Soft Rock of Cretaceous Formation in Bojianghaizi Mine[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(3): 798-804.

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泊江海子矿白垩纪地层冻结软岩力学特性试验

Experimental Study on Mechanical Properties of Frozen Soft Rock of Cretaceous Formation in Bojianghaizi Mine

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