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      This standard applies to the calculation of porosity of coal and rock, including the determination of total porosity and effective porosity. The standard specifies the terms, definitions and methods for the calculation of porosity of coal and rock, and is suitable for specimens that do not collapse and are stable in volume. Through accurate measurement of porosity, it provides necessary technical support for coal mining and geological engineering, ensuring the safety of engineering activities and the accuracy of material characteristic analysis.

      This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
      Status Active
      CCS D04 ICS 73.010
      Release Date 2009-04-08 00:00:00 Implementation Date 2009-12-01 00:00:00
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