Volume 28 Issue 5
Oct.  2000
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CUI Ximin, FANG Zhihai, ZUO Hongfei, LI Haixia. DE-WATERING EFFECT OF AQUIFER TO SURFACE SUBSIDENCE[J]. COAL GEOLOGY & EXPLORATION, 2000, 28(5): 47-48,52.
Citation: CUI Ximin, FANG Zhihai, ZUO Hongfei, LI Haixia. DE-WATERING EFFECT OF AQUIFER TO SURFACE SUBSIDENCE[J]. COAL GEOLOGY & EXPLORATION, 2000, 28(5): 47-48,52.
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DE-WATERING EFFECT OF AQUIFER TO SURFACE SUBSIDENCE

  • 1. Beijing Campus, China University of Mining & Technology;

  • 2. National Investment of Xinji Energy Stock Company;

  • 3. Xuzhou Coal Mine Bureau;

  • 4. Beijing Campus, China University of Mining & Technology

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  • Received Date: November 01, 1999
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    • Abstract
  • In order to improve the predicting accuracy of mining subsidence,to explain the phenomena which the subsidence coefficient is larger than 1,and to decrease the mining damage,on the basis of bore-hole measuring of dynamic water level results,the 3 kinds of relations between overburden failure and de-watering of water-holding strata is obtained.The void ratio may decrease with the increasing of effective stresses after water losing.The mechanism of consolidation subsidence due to de watering of water-bearing strata is established.The calculation method of surface subsidence caused by underground mining and de-watering is derived using superposition principle.The example demonstrates that the consolidation subsidence due to de-watering accounts for 25% of the coal seam mining subsidence.
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