Volume 39 Issue 3
Mar.  2014
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Article Navigation >  Earth Science  > 2014  >  39(3): 350-356
Zhao Fenghua, Sun Hongfu, Liu Naili, Cai Wenju, Han Rui, Chen Bing, 2014. Evaluation of Static Acid Production Potential for Coal Bearing Formation. Earth Science, 39(3): 350-356. doi: 10.3799/dqkx.2014.033
Citation: Zhao Fenghua, Sun Hongfu, Liu Naili, Cai Wenju, Han Rui, Chen Bing, 2014. Evaluation of Static Acid Production Potential for Coal Bearing Formation. Earth Science, 39(3): 350-356. doi: 10.3799/dqkx.2014.033
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Evaluation of Static Acid Production Potential for Coal Bearing Formation

doi: 10.3799/dqkx.2014.033
  • 1.

    College of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China

  • 2.

    Beijing STS Instrument Company Limited, Beijing 100085, China

  • Received Date: 2013-05-23
  • Publish Date: 2014-03-15
    Abstract
  • Static acid production potential (APP) evaluation is useful to acid mine drainage control, but traditional APP evaluation methods can not accurately evaluate complex rock samples. In this study, key indexes of APP evaluation are found and a new APP evaluation method is established for complex rock samples through evaluating APP of twelve typical rock samples in Permo-Carboniferous coal-bearing measures from Xishan coalfield in Shanxi Province. It is demonstrated that net acid production potential (NAPP), the ratio of acid neutralization capacity (ANC) to maximal potential of acidity (MPA) are the most important indexes of APP evaluation. The complex rock samples with little NAPP absolute value (< 50 kg·t-1) can be accurately evaluated using the above two key indexes. Mineralogical information can reflect long term APP of complex rock samples. App evaluation precision of complex rock samples is improved through analyzing the ratio of total content of carbonate minerals to pyrite content. It is shown that Paste pH can only reflect natural acidity-alkalinity of rock samples. Therefore, Paste pH can not be used as a key index for APP evaluation. The accuracy of static acid production potential evaluation methods is further validated through comparing typical mine drainage characteristics in Xishan coalfield.

     

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    • References(13)
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