盐岩损伤自愈合特性研究综述  

Summary on damage self-healing property of rock salt

作　　者：康燕飞[1] 陈结[1] 姜德义 刘伟[1] 范金洋[1] KANG Yan-fei;CHEN Jie;JIANG De-yi;LIU Wei;FAN Jin-yang(State Key Laboratory for Coal Mine Disaster Dynamics and Controls,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044

出　　处：《岩土力学》2019年第1期55-69,共15页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.51574048;No.51604044;No.41672292);重庆市研究生科研创新项目(No.CYB17046)~~

摘　　要：盐岩具有渗透率低、延展性高、蠕变特性好以及损伤自愈合等特性,已经成为国内外公认的地下石油天然气储库以及储存放射性废料最理想的储存介质之一。盐岩损伤自愈合作为盐岩损伤演化重要的一部分,对储库开采扰动区盐岩力学稳定性以及渗透性具有重要影响。从发生机制、影响因素、本构模型等方面综述了国内外盐岩损伤自愈合研究进展,总结了国内盐岩损伤自愈合研究成果。盐岩损伤自愈合主要机制包括压力闭合、表面能驱动下的扩散效应以及盐岩内部晶体再结晶作用。影响盐岩损伤自愈合特性的主要因素有压力、温度、初始损伤、湿度、化学环境等。对考虑盐岩损伤自愈合特性的MDCF模型以及Lux/Hou模型作了简要介绍。最后指出了我国含杂质层状盐岩损伤自愈合特性值得关注的几个重点研究方向。Rock salt has been recognized as a highly suitable medium for geological storage of oil, gas and radioactive wastes because of its low-permeability, high-ductility, low-creep strength and capacity for self-healing. The self-healing of damage, as a significant part of damage evolution of rock salt, has important influence on the stability and permeability of rock salt in excavation disturbed zone(EDZ). The research progress of damage self-healing property of rock salt is summarized from the aspects of mechanism, influencing factors and constitutive models, and the research advances in damage self-healing property of rock salt in China are summarized. In the EDZ, damage healing can occur under three different mechanisms: mechanical closure, diffusive healing driven by surface energy reduction and healing by recrystallization. The major factors that may affect crack healing are stress, temperature, initial damage, humidity, chemical environment and so on. The MDCF model and the Lux/Hou model which consider the self-healing characteristics of salt rock damage are introduced. Furthermore, several key research directions on the damage self-healing of layered salt rock in China are put forward.

关 键 词：盐岩 损伤愈合 损伤演化 盐腔利用 本构模型 

分 类 号：TU452[建筑科学—岩土工程]