摘要
针对膨胀性充填物对裂隙岩体渗流影响方面研究较少的现状,基于大冶铁矿充填介质的水理性质和蚀变岩体力学参数测试成果,在充填物膨胀压力与蚀变岩体力学参数对比分析的基础上探讨了充填物的力学响应对裂隙渗流的影响。研究表明,充填物的膨胀效应对蚀变岩体力学变形起着重要的控制作用,充填物膨胀产生的拉张效应和剪切效应都导致裂隙渗透性的显著增加,并且充填物的塑化效应和液化效应也明显提高了裂隙的渗透性。
Facing to the problem that the influence of expansion fracture fillings on fracture seepage is rarely studied at present, based on the test results of the hydrated properties of fracture fillings and the mechanical parameters of altered rock mass of Daye Iron Mine, the influence of the mechanical response of fillings on fracture seepage is discussed on the basis of the comparison of expansion stress of fracture fillings with mechanical parameter of altered rock mass. It is showed that the expansion effect of fracture fillings has an important influence on the deformational of altered rock mass. Both tensile effect and shear effect produced by fracture fillings can greatly increase the permeability of the fracture. What＇s more, the plasticizing effect and liquefaction effect of fracture fillings can also improve the permeability of the fracture.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第4期577-580,共4页
Rock and Soil Mechanics
关键词
裂隙充填物
力学响应
渗流
膨胀效应
fracture fillings
mechanical responses
seepage
expansion effect
