Experimental Study on Triaxial Compression of Coal Containing Methane Under Different Confining Pressure

Based on the briquette specimens of the K₁ seam of Yushe Mine in Guizhou, the experiment for studying triaxial compression of coal containing methane under different confining pressures are carried out when the temperature and gas pressure are constant, and the change law of the deformation properties and mechanical parameters of coal containing methane are explored. The experimental results show that with the increasing of confining pressure, the slope of stress-strain curve has steepened trend, peak strain has increasing trend, triaxial compressive strength and elastic modulus increases, the poisson ratio decreases.