Seepage experiment of sandstone during creep processes

Rock body is made of rock,structural surface and fillings in the structural surface.Under the control of rock mass structure,the deformation of rock mass is complicated.By using trixial microcomputer control of coal rock rheological testing machine,the creep character of Brittle sandstone under the influence of water pressure and stress coupling was studied.It is belived the seepage parameter of rock body is related to stress condition around rock body in actual seepage rock body.It is studied that seepage parameter gets smaller with the increase of confining pressure;the seepage parameter will change with the increase of pore water pressure.At last,the effect of mechanic and erosion of pore water increased the damage speed of sample in the process of creep.