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| EXPERIMENTAL RESEARCH ON IMPACT OF TEMPERATURE ON SEEPAGE CHARACTERISTICS OF COAL CONTAINING METHANE UNDER TRIAXIAL STRESS |
| XU Jiang1，2，ZHANG Dandan1，2，PENG Shoujian1，2，NIE Wen1，2，WANG Lei1，2，CHEN Yulong1，2 |
| (1. Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering，Ministry of Education，Chongqing University，Chongqing 400044，China；2. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam，Chongqing University，Chongqing 400044，China) |
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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.
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Received: 17 March 2011
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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2011, Vol. 30 
