双重介质渗流水力特性试验装置研究及应用

研制的双重介质渗流水力特性试验系统，由双重介质试验模块、水循环控制模块和数据采集模块三部分组成，较好地解决了孔隙介质和裂隙介质的模拟、边界条件的模拟、止水工艺的完善和水交换信息采集等关键问题，并具有裂隙宽度可调节，精度高，自动化程度高，试验数据实时全自动采集等特点。该系统可用以研究基于双重介质模型的水量交换以及渗流场的水压分布规律以及双重介质的水力性态和渗流机制。利用该试验系统进行双重法介质渗流水力特性试验，通过趋势图直观分析、极差和方差分析和F-检验等分析手段，得出孔隙-裂隙双重介质水交换影响因子对双重介质水交换的影响能力，从大到小依次为：裂隙宽度、孔隙介质渗透系数、压力梯度、水温。

Research and application on double medium seepage hydraulic characteristics test device

A test system of double medium seepage characteristics which is composed of double medium test module, water cycle system control module and data collection module is developed. The test system solves the key issues of porous media and fissure medium simulation, boundary conditions simulation, the perfection of water sealing technique and water exchange information collection, etc., and it has the characteristics of that the fracture width can be adjusted, higher precision, higher automation and test data real-time automatic acquisition. The test system of double medium seepage characteristics is used to study the distribution of water pressure that based on the water exchange and the seepage field of double-medium model, as well as the hydraulic behavior of double medium model and percolation mechanism. Using the test system of double medium seepage characteristics carries on the double medium seepage characteristics test and making use of the methods of trend diagram intuitive analysis, range and variance analysis and F-inspection, we obtained that water exchange factor of pore and fracture double medium exert the effects on the water exchange of double medium model. The influence ability of water exchange factor of pore and fracture double medium which are in the order, from big to small, are fracture width, porous media permeability coefficient, pressure gradient and water temperature.