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首页> 外文会议>2007采矿科学与安全技术国际学术会议 >Experimental Study on the Swelling Power of Sandstone at High Temperature
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Experimental Study on the Swelling Power of Sandstone at High Temperature

机译：高温下砂岩溶胀力的试验研究

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摘要

The hot swelling power of sandstone token from the roof of coal seam in Guhanshan coal mine, Jiaozuo has been studied when the temperature is from 200°C to 600°C in this paper. The experimental results show that the heat swelling power appeared at low heating temperature because of the sandstone with lot of clay, and the swelling power is smaller when the temperature is lower than 500°C,but it will sharply rise when the temperature is higher than 500°C. It indicates that main reasons are both morphic transformation of crystalloid and structual break of mudstone when the temperature is low, and the sharply change of the swelling power is caused by both break of crystal structure and the formation of new crack in the interior of sandstone when the temperature is upto a specifical temperature.
机译：本文研究了焦作孤寒山煤矿煤层顶板在200℃至600℃温度下的热膨胀力。实验结果表明，由于砂岩中粘土含量较高，在较低的加热温度下出现了热膨胀力，温度低于500℃时，膨胀力较小，而温度高于500℃时，则急剧上升。 500℃。这表明主要原因是低温时泥岩的晶体形态转变和结构性破裂，而溶胀力的急剧变化既是由于晶体结构的破裂，又是当温度升高时砂岩内部新裂缝的形成所致。温度达到特定温度。

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