裂隙岩体渗流-应力耦合等效渗流阻模型  

An equivalent seepage resistance model with seepage-stress coupling for fractured rock mass

作　　者：陶煜[1,2] 刘卫群[1,2] 

机构地区：[1]中国矿业大学力学与建筑工程建学院,江苏徐州221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《岩土力学》2012年第7期2041-2047,共7页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.50774083;No.41074040);国家"973计划"项目子课题(No.2009CB219605);教育部"新世纪优秀人才支持计划"课题(No.NCET-07-0803)

摘　　要：针对含区域主干裂隙岩体在应力作用下的渗透特性进行了研究。运用单裂隙平行板渗流理论、弹性力学方法,结合模拟电路知识,提出等效渗流阻的概念。在分析裂隙岩体区域中主干裂隙系统几何构造的基础上,建立了基于等效渗流阻的-渗流-应力耦合模型,得到了裂隙岩体等效渗流阻、渗透率与应力之间的关系,从而为研究含区域主干裂隙岩体的应力-渗流耦合规律提供了方便。结合一个基于等效渗流阻模型的算例,考察了含"人"字形组合裂隙试样的渗透特性。经进一步细化后,该模型可用于分析地应力作用下的含区域主干裂隙岩体渗流演化规律。Seepage characteristics of regional principal fratured rock mass are studied with the effect of stress. Using parallel plate model, elastic mechanics and electronics in single fracture, a new conception of equivalent seepage resistance is put forward. On the basis of the geometric construction of regional principal fracture, an equivalent seepage resistance model with seepage-stress coupling is established. With the model the relationships between equivalent seepage resistance, permeability and stress are obtained, which is helpful to the stress-seepage coupling characteristics of regional principal fractures in rock mass. Combining a case study with the model, the seepage laws of the herring-bone combined fracture are researched. Through further detail partition and consideration, this model can be used to study fracture seepage evolution law affected by in-situ stress in rock mass containing regional principal fracture.

关 键 词：渗流 裂隙岩体 渗流阻 应力耦合 模型 

分 类 号：TU452[建筑科学—岩土工程]