The invention discloses an experimental device for gas
permeation under complex conditions. The experimental device is characterized by comprising a sealing loading box, a
permeation test piece, a loading device, an
oil pressure sealing
system, a gas supplying
system and a gas balancing
system, wherein the loading device is used for loading the
permeation test piece to enable the permeation test piece to be in a predetermined stress state; under the assistance of the
oil pressure sealing system, a first pressure chamber comprises a rectangular frame, force transmission columns, side baffle plates and the outer side surface of the permeation test piece, and a second pressure chamber comprises the side baffle plates and the inner side surface of the permeation test piece; under the effect of
gas pressure difference, gas in the first pressure chamber gradually permeates into the second pressure chamber, so that the permeation law of the gas around holes can be researched. The experimental device can be used for enabling
coal and rock masses to be in a stress state similar to
field conditions, and the influence of the breaking situations of the
coal and rock masses around the holes in the permeation law can be considered, so that the experimental device has great significance on the research on the permeation, absorption and resolution law of the gas in the
coal and rock masses around roadways under the complex conditions.