摘要
利用煤激波管进行了一维含气多孔介质在突然卸载条件下的破坏实验,并对破坏的形态(层裂和层松)以及破坏前后气体渗流特性的变化进行了实验研究。实验结果表明:试样的破坏存在层裂和层松两种典型的破坏形式,破坏后煤样渗透率的变化本质上是由层松引起的;渗透率的分布与破坏应变直接相关,而充气压力是决定总体变化的参数;试样开裂破坏后的渗透率是原始渗透率的1～2倍;随充气压力增加.破坏深度按某一特征厚度的倍数增加。
Seepage experiments of one-dimensional gas-containing porous media under sudden unloading were carry out, permeability variation and damage were examined in the experiment before and after damage. Experimental results show that there exist two kinds of typical damage patterns(layer split and layer looseness) in damaged samples, and percolation variation of damaged samples is caused by layer looseness essential ly. In damaged samples, percolation variation is directly interrelated to damage strain, but it has a indirect relevance to porous pressure. In addition, damaged sample has 1～2 times of the original sample percolation coefficient, and the damage depth of the sample increases by a fixed numerical value, namely there exists a charateristic thickness in damaged samples.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1997年第1期15-22,共8页
Explosion and Shock Waves
基金
中国科学院渗流力学基金项目
关键词
煤激波管
层裂
渗流
渗透率
破坏实验
coal shock tube, layer split, layer looseness, seepage flow, ratio of permeability
