Advances in Shear-Seepage Properties of Rock Mass Filled with Joint Fissure

rock masses evolve into "sandwich" shapes when filled with joint
fissures under long-term geological action, which causes rock
discontinuities and destroys rock stability. This study reviews the
advances in the shear-seepage properties of rock masses filled with
joint fissures (RMFJFs) under static, quasistatic, and dynamic loads,
including laboratory experiments, theoretical analysis, and numerical
calculations. Results show that the shear properties of RMFJFs are
closely associated with the strength of the fillings, the filling degree,
and the roughness of the joints. RMFJFs develop under the stress of
surrounding rocks, and their seepage properties are therefore affected
by the surrounding stress and the filling degree, the rock layer
thickness, and the porosity of the rock or fillings. However, detailed
studies on the seepage properties of RMFJFs under cyclic loading,
impact loading, and different shear rates are lacking. Finally, the
existing problems in the research on the seepage properties of
RMFJFs are clarified, a constructive research strategy is proposed,
and the related trends are discussed in light of the overall mechanical
behavior of RMFJFs.