东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (10): 974-977.DOI: -

• 论著 • 上一篇    下一篇

脆性岩石破裂过程渗透性演化试验

杨天鸿;徐涛;冯启言;唐春安   

  1. 东北大学岩石破裂与失稳研究中心;东北大学岩石破裂与失稳研究中心;中国矿业大学环境与测绘学院;东北大学岩石破裂与失稳研究中心 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-10-15 发布日期:2013-06-24
  • 通讯作者: Yang, T.-H.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50204003,50174013)·

Experimental investigation on permeability evolution of brittle rock in failure process

Yang, Tian-Hong (1); Xu, Tao (1); Feng, Qi-Yan (2); Tang, Chun-An (1)   

  1. (1) Ctr. for Rock Instability, Northeastern Univ., Shenyang 110004, China; (2) Sch. of Environ. and Spatial Info., China Univ. of Mining and Technol., Xuzhou 221008, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-10-15 Published:2013-06-24
  • Contact: Yang, T.-H.
  • About author:-
  • Supported by:
    -

RichHTML

1

PDF (PC)

1090

摘要： 为探讨脆性岩石变形破裂过程中渗透性的演化规律,利用电液伺服控制岩石力学试验系统(MTS815 02)对不同岩性的岩石进行了应力 应变全过程渗透试验·试验结果表明岩石的渗透率与其应力状态密切相关,岩石峰后的渗透率普遍远大于峰前,常在应力 应变曲线峰后区出现"突跳"现象,而造成这一现象的根本原因在于岩石内部细观结构的变化·并根据试验结果建立了峰值前后反映岩石结构变化特征的分段应力 渗透率关系方程,为建立描述岩石破裂过程应力 渗透率耦合数值模型提供了可靠的试验依据·

关键词: 脆性岩石, 破裂过程, 应力渗透率方程, 渗透性演化, 孔隙水压, 试验研究

Abstract: A large number of permeability tests of different brittle rocks were conducted using an electro-hydraulic servo-controlled MTS 815.02 testing machine to investigate the permeability evolution characteristics of brittle rock in compressive deformation and failure process corresponding to the complete stress-strain path. Laboratory tests show that the permeability of brittle rock relates closely to the state of stress in rock and the permeability of brittle rock in post-peak stress-strain region is much higher than that in pre-peak stress-strain region. Moreover, the sharp increase or sudden jump of permeability frequently occurs in the post-peak stress-strain region due to the catastrophic changes of microstructure of rock in compression. Based on the experimental results of permeability evolution tests for different brittle rocks, the piecewise stress-permeability fitting curves for brittle rocks in compression were obtained to offer reliable experimental evidence for the numerical model of coupled stress-permeability regarding the permeability evolution of brittle rock in compressive failure.

中图分类号: