温度对含瓦斯煤力学性质影响的试验研究

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Abstract By using the self-developed triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing methane，the triaxial compressive tests on moulded coal containing methane are conducted under different temperatures；and the influences of temperature on deformation and mechanical properties of coal containing methane are studied. The results show that the deformation of coal containing methane increases with the increase in temperature under the same stress conditions；the axial，radial and volumetric strains have different trends in different temperature ranges，the changing speed of radial strain will exceed that of axial strain when temperature exceeds 60 ℃. The failure angle increases slightly with the increase in temperature. The compressive strength，residual strength and elastic modulus decrease gradually with the increase in temperature，but their trends are different in different temperature ranges. Poisson′s ratio increases at the beginning，then it decreases as temperature increases. It concludes that the temperature plays an important role in the deformation and mechanical properties of coal containing methane；the increase in temperature will weaken the strength of coal containing methane generally；the changing trends of deformation and mechanical properties of coal containing methane are different in different temperature ranges. The results will provide a certain referential value for deep mining and roadway support.

Key words： mining engineering coal containing methane temperature mechanical properties deformation properties

Received: 18 June 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/IS1/2730

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