土工基础

土工基础 ›› 2023, Vol. 37 ›› Issue (2): 330-334.

• 测试技术 • 上一篇    

高温冷却对砂岩孔隙变化影响的研究

邓焜耀   

  1. （贵州大学土木学院，贵阳 550000）
  • 收稿日期:2023-02-14 修回日期:2023-02-23 出版日期:2023-04-30 发布日期:2023-04-20
  • 作者简介:邓焜耀（1998-），男，硕士研究生，研究方向为岩石微观结构。

Effect of the High Temperature Cooling Process on the Porosity of Sandstone 

DENG Kunyao   

  1. (School of Civil Engineering, Guizhou University, Guiyang 55000)
  • Received:2023-02-14 Revised:2023-02-23 Online:2023-04-30 Published:2023-04-20

摘要： 为研究不同温度对白砂岩下液氮以及水进行冷却导致的物理性质影响，通过采用低场核磁共振技术（MRI）对白砂岩石测量T2谱，在岩石加热至不同的温度阶段（200 ℃～600 ℃）使用水以及液氮分别进行冷却。从微观的角度即岩石孔隙变化来进行分析温度以及水冷却以及液氮冷却岩石对白砂岩物理性质影响的原因。试验结果表明：500 ℃可以作为不同冷却方式对岩石内部变化的临界值，超过500 ℃，岩石的内部孔隙变化显著。结果可以看出液氮冷却后的岩石变化大于水冷却的影响。


关键词: 核磁共振, 孔隙度, 水, 液氮

Abstract: To study the influence of different liquid nitrogen and water cooling temperatures on the physical properties of the white sandstone, the low-field nuclear magnetic resonance imaging (MRI) method was used to measure the T2 spectrum of the white sandstone. The water and liquid nitrogen were used to cool the rock mass at different temperature stages (200℃~600℃). The influence of temperature, water-cooling and liquid nitrogen-cooling on the physical properties of the white sandstone is analyzed from the microscopic point of view, namely the change of rock pores. The test results show that: the 500℃ can be used as a critical value of different cooling methods on the changes in the intrinsic properties of the rock mass, above 500℃, the internal porosity of the rock mass changes significantly. The results show that the change of rock mass after the liquid nitrogen cooling is greater than the effect of the water cooling.

Key words: Nuclear Magnetic Resonance Imaging (MRI), Porosity, Water, Liquid Nitrogen

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