地理研究

地理研究 ›› 2000, Vol. 19 ›› Issue (4): 137-443.doi: 10.11821/yj2000040001

• 论文 •    下一篇

寒冻条件下热力作用对岩石破坏的模拟实验及其分析

朱立平1, 王家澄2, 彭万巍2, 陶兆祥2   

  1. 1. 中国科学院地理科学与资源研究所, 北京 100101;
    2. 中国科学院寒区旱区环境与工程研究所, 兰州 730000
  • 收稿日期:1999-05-22 修回日期:2000-08-10 出版日期:2000-12-15 发布日期:2000-12-15
  • 作者简介:朱立平(1965- ),男,河北唐山人,博士,中国科学院地理科学与资源研究所副研究员。主要研究方向为沉积环境和地表风化过程。
  • 基金资助:
    国家自然科学青年基金资助项目(40001004);中国科学院冻土工程国家重点实验室青年基金课题资助项目(1997-02)

The insulation influence to rocks under the low temperature conditions

ZHU Li-ping1, WANG Jia-cheng2, PENG Wan-wei2, TAO Zhao-xiang2   

  1. 1. Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Institute of Environment and Engineering in Cold Dry Regions, CAS, Lanzhou
  • Received:1999-05-22 Revised:2000-08-10 Online:2000-12-15 Published:2000-12-15

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33 | 4

摘要： 选取青藏高原不同地区、不同类型的岩石经过预加工处理后,使之处于低温条件下具有较强热辐射变化的环境中,以调查寒冷条件中的岩石在强烈热辐射作用下的表现。实验表明,寒冷条件下较强的热源辐射可以产生快速的环境温度变化,并导致相应的岩石内部温度变化,这种变化幅度可以使矿物产生强烈的胀缩并导致岩石内部结构的破坏。岩石的组构决定着其风化的进程,这表现在不同类型的岩石在水饱和与盐饱和的条件下,实验后的超声波传输速率与重量变化有一定差异。

关键词: 低温, 热辐射, 岩石风化, 破坏

Abstract: Different types of rock samples, which are collected from different areas on the Qinghai-Tibet Plateau, have been pre-processed and put in the environment of low temperatures with intensified insulation variation. This is to investigate the insulation implication to the rocks under cold conditions. The results of experiments showed that the intensive heat insulation, even under cold conditions, could induce speedy temperature variation of the environment and that in the rock internal structures. This kind of variation was closely related to rock mineral contents. The speedy temperature changes caused the rock internal minerals continue to expand and contract which lead to the damage of the rocks internal structures. The compositions and structures of rocks dominated their weathering process, which may be confirmed by that, to the different types of rocks under conditions of saturated water or salt solutions, the ultrasonic transferring velocities and weights have different variations.

Key words: low temperatures, insulation, rock weathering, damage

PACS: 

  • P512.1