岩体裂隙网络非线性非立方渗流研究与应用

裂隙岩体渗流与岩体其他分析密切相关。岩体裂隙网络渗流理论最初主要是建立在线性立方定律的基础基上的，当裂隙水头较大或者流速较大时，裂隙水流不再满足线性立方定律，此时如仍用线性立方水流分析，无疑将会给渗流分析带来较大的误差，甚至引起工程事故。当裂隙水流不满足线性立方定律时，研究这种渗流自身的规律则是非常重要的，也是必要的。通过研究裂隙网络稳定和非稳定情况下的非线性渗流、非立方渗流规律，得出以下结论：①当渗流规律偏离线性渗流较远时，按非线性渗流计算出的水头分布和流量与线性渗流相差较大；当偏离不远时，计算出的水头分布和流量与线性渗流相差较小，可近似简化为线性渗流分析；②当渗流偏离立方渗流较远时，按非立方渗流计算出的水头分布和流量与立方渗流相差较大；当偏离不远时，计算出的水头分布和流量与立方渗流相差较小，可近似简化为立方渗流分析；③对于非线性非立方渗流，应综合考虑非线性与非立方两种因素对渗流的影响。

Study of nonlinear noncubic seepage in netwok rock and its application

Seepage analysis fractural rock mass has very close relation with other analyses of rock mass. Seepage theory of fractural network rock mass is based on linear cubic law. When the water head is very high or the fracture flux is very large, fracture stream doesn’t abide by linear cubic law; if such seepage is still analyzed by using linear cubic law, it will bring great errors, even make engineering disaster. If the fluid in the fractures doesn’t abide by the linear cubic law, the study for themselves’ rules is very important and essential. The rules of nonlinear seepage and non-cubic seepage are reaearched; it is concluded that (1) if the seepage rule deflected the linear cubic law very much, there would exist great differences in water head and flux; if the seepage rule deflected the linear cubic law very little, the diffrerences would also be very little, it can be simplified to linear cubic seepage; (2) if the seepage rule deflected the cubic-law very much, there would exist great differences in water head and flux; if the seepage rule deflected the cubic-law very little, the diffrerences would also be very little, it can be simplified to cubic seepage; (3) for the nonlinear non-cubic seepage, both the nonlinear effect and the non-cubic effect should be taken into account.