The test results show that the porosity of sandstone decrease with the increasing effective stress at the fixed temperature level, following the law of negative exponent.

试验结果表明，在温度水平一定的条件下，砂岩的孔隙度随有效应力的增加而呈负指数规律减小；

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The test results show that the porosity of sandstone decrease with the increasing effective stress at the fixed temperature level, following the law of negative exponent.

试验结果表明，在温度水平一定的条件下，砂岩的孔隙度随有效应力的增加而呈负指数规律减小；

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