Abstract：A manufacturing process of coal briquette specimen(CBS) and raw coal specimen(RCS) is introduced；and then the method and steps of triaxial test for coal specimens containing gas(CSCG) are designed. By means of triaxial compressive experimental apparatus composed of a self-developed triaxial creep gas-seepage device and a material testing machine，the tests of CSCG are performed on CBS and RCS and a large number of test data under different confining pressures and gas pressure conditions are obtained；and the deformation characteristics and compressive strength of the two kinds of CSCGs are mainly investigated in triaxial stress conditions based on the experimental results. The results show that the confining pressure and gas pressure have a certain extent effect on the deformation characteristics and compressive strength of CSCG. The CBS and RCS have a commonness to some extent in deformation characteristics and compressive strength，but there are distinct differences between the mechanical parameters of the two kinds of coal specimens. The elastic modulus and Poisson¢s ratio are not constant but variable during the distorting of CSCG；and the elastic moduli of the two types of CSCGs are very different and their Poisson¢s ratios are also not equal actually；the deformation of CBS is much larger than that of RCS under a same loading condition，and in addition，the shape change of CBS is also larger than that of RCS. The results have a reference valuable for further exploring the mechanical properties of coal containing gas in future.
