Abstract: Solid-gas coupling simulation experiment in the lab is one of methods of studying on the law of relief methane migration. Development of similar material of coal-rock and gas solid-gas coupling is the basis of the simulation experiment. The cementing material of paraffin and oil have been chosen as affecting factors to carry out the orthogonal test under the condition of changing the content of cementing agents. The influence of paraffin and oil on elastic modulus E and flow rate v of the similar material test-pieces is analyzed. Different proportions of similar material test-pieces have been researched in compressive strength σc, tensile strength σt, elastic modulus E, brittle parameter E/λ and permeability. The equation of permeability has been obtained by combining permeability calculation formula and negative exponential fitting formula of experimental data. It is shown that with increase of paraffin content the permeability present negative exponential. The similar materials can be used in physically simulating experiment, which lays a foundation for the solid-gas coupling physically simulating experiment.

Key words: solid-gas coupling, simulation materials, orthogonal test, cementing material, permeability