单裂隙水力特性的研究

Study for Hydraulic Character on Flow Through a Single Fracture

目前单裂隙水流规律广泛采用立方律描述，裂隙中的流量与裂隙两表面间的平均张开度成立方这一关系是从理论上推导出来的。而裂隙随应力发生非线性变形，使裂隙中的水流特性发生变化。本文依据Ｄｅ－ｔｏｕｒａｎｙ和Ｓｕｎｄａｒａｍ的实验数据，研究了在法向应力状态下，裂隙内水力特性的变化规律，发现裂隙内的水流规律不符合立方律，单位水头流量与裂隙开度成指数关系而与应力成幂律关系。

Flow law in single fracture is described by cubic law at present.The relation between flow rate throuth fracture and average aperture in two walls of fracture obeys cubic law that is derived from theory.The nonlinear deformation of fracture in stress field makes flow law through fracture changed.Based on Detourany's experimental data,the hydraulic character on flow through a single fracture to normal stress was studied,we found that flow law was not in keeping with general cubic law.The realtion between flow rate and fracture aperture is exponential law and the relation between flow rate and normal stress is power law.