The mechanical properties of interaction between deep-sea sediments and tracks is an important basis for the design of deep-sea mining system. Based on the researches carried out by experts at home and abroad

the mixture of bentonite and water was taken to replace the deep-sea sediments

and the tracks was split into cave-in panel and shear panel

then the pressure-sinkage test and shear deformation test about the sediments was carried out in a special test cell; the pressure-sinkage relationship curve and shear stress-shear displacement relationship curve about the interaction between sediments and tracks can be got after the test. The value of every parameter in pressure-sinkage model of deep-sea sediments was got based on Bekker sinkage model; meanwhile

the shear deformation process of deep-sea sediments was found to have several stages; moreover

which can be divided into linear elastic stage

strain-hardening stage

strain-softening stage and residual strength stage