Effects of fracture parameters and roughness on heat?flow coupling in rock masses with two?dimensional fracture networks

Discrete fracture network (DFN) is an effective means of describing the coupling heat flow in underground fractured rock mass. In this paper, improved DFN proposed by introducing correlation function trace length and aperture, which more consistent with real data. Next, based on model, influence roughness fluid transmission was evaluated, relationship between aperture joint coefficient (JRC) established. Finally, exponential confining pressure heat-flow process considered model. Besides, reliability model verified comparing analytical solution two-dimensional single-fracture problem. The results show that under same conditions, considering geometric parameters fracture, seepage transfer rates increased, outlet boundary reached maximum value, average temperature dropped rapidly. However, reduces rate decline temperature. will lead to a decrease about 3.5% law practical engineering. presented paper supplement can provide theoretical basis numerical calculation tool for related mass