三轴应力条件下温度对原煤渗流特性影响的实验研究

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Abstract Using the self-developed triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing methane，permeability of coal sample under different effective stresses，different gas pressures and different temperature conditions is determined；and the relationship between permeability and temperature under different effective stresses and different gas pressures is concluded. Based on the experiments，in order to eliminate the deviation due to individual difference，a temperature sensitivity coefficient which can objectively reflect the influence of temperature on the permeability of coal samples is proposed. And then the relationship between temperature and effect of temperature on permeability is also studied. The experimental results are shown as follows：(1) When effective stress and gas pressure keep constant，permeability and temperature sensitivity coefficient both decrease with the increasing temperature，which indicates that the higher the temperature is，the less the effect of temperature on permeability is. (2) If the temperature is same，the larger the effective stress and gas pressure are，the lower the temperature sensitivity coefficient is and the less the effect of temperature on permeability is.

Key words： mining engineering permeability temperature sensitivity coefficient effective stress gas pressure

Received: 17 March 2011

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http://www.rockmech.org/EN/Y2011/V30/I9/1848

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