EXPERIMENTAL STUDY OF MECHANICAL CHARACTERISTICS
OF COAL-SERIAL SANDY MUDSTONE AT
DIFFERENT TEMPERATURES
ZHA Wenhua1，2，SONG Xinlong1，2，WU Tengfei1，2
(1. Key Laboratory of Mine Safety and High Efficient Mining Cosponsored by Anhui Province and Ministry of Education，Anhui University of Science and Technology，Huainan，Anhui 232001，China；2. College of Energy and Safety，Anhui University of
Science and Technology，Huainan，Anhui 232001，China)
Abstract：Laboratory tests were carried out to study the mechanical properties of coal-serial sandy mudstone under the temperature from 25℃ to 55 ℃ using the test system of rock mechanics RMT–150B and the temperature chamber GD–65/150. The complete stress-strain curve，the peak stress，the peak strain，the elastic modulus and the deformation modulus of the sandy mudstone under investigation were affected by the temperature conditions. As the temperature increases，the peak stress and the peak strain decrease gradually，but the peak stress and the peak strain decrease with a different values depending on whether the temperature is lower or higher than 40 ℃. The peak stress decreases 22.1% if the temperature is between 25 ℃ to 40 ℃ and decreases 4.3% between 40 ℃ to 55 ℃；The peak strain decreases 12.9% if the temperature is between is between 25 ℃ to 40 ℃ and decreases 29.9% between 40 ℃ to 55℃. The elastic modulus and the deformation modulus both decrease linearly with the increasing of temperature. The results are useful for the efficiency and safety of deep coal mining.
郤保平，赵阳升，万志军，等. 热力耦合作用下花岗岩流变模型的本构关系研究[J]. 岩石力学与工程学报，2009，28(5)：956-967.(XI Baoping，ZHAO Yangsheng，WAN Zhijun，et al. Study of constitutive equation of granite rheological model with thermo-mechanical coupling effects[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(5)：956-967.(in Chinese))
[1]
王绳祖. 高温高压岩石力学——历史、现状、展望[J]. 地球物理学进展，1995，10(4)：1-31.(WANG Shengzu. High-temperature/ high-pressure rock mechanics：history，state-of-art and prospect[J]. Progress in Geophysics，1995，10(4)：1-31.(in Chinese))
[5]
张志镇，高 峰，徐小丽. 花岗岩力学特性的温度效应试验研究[J]. 岩土力学，2011，32(8)：2 346-2 352.(ZHANG Zhizhen，GAO Feng，XU Xiaoli. Experimental study of temperature effect of mechanical properties of granites[J]. Rock and Soil Mechanics，2011，32(8)：2 346-2 352.(in Chinese))
[13]
吕晓涛. 深厚富水基岩井筒冻结壁砂质泥岩力学特性试验研究[硕士学位论文][D]. 西安：西安科技大学，2011.(LU Jitao. Experimental study on the sandy mudstone mechanical properties for frozen shaft wall in deep thick water-rich bedrocks[M. S. Thesis][D]. Xi'an：Xi?an University of Science and Technology，2011.(in Chinese))
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2014, Vol. 33 
