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一种房式采煤法遗留的呆滞煤柱回收方法

  • Release time:2020-10-30
  • Hits:

  • Affilication of Author(s): 

    矿业工程学院

  • Disigner of the Invention: 

    zhangdongsheng

  • Note: 

    张东升

  • Type of Patent: 

    国内

  • State of Patent: 

    专利授权

  • Application Number: 

    201010161124.X

  • Number of Inventors: 

    2

  • Service Invention or Not: 

    no

  • Application Date: 

    2010-04-22

  • Authorization Date: 

    2012-05-23

  • First Author: 

    Ma Liqiang
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