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Metal Mine ›› 2011, Vol. 40 ›› Issue (10): 41-43+54.

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Feasibility Study on Equal Cement-sand Ratio Backfill based on Stability Judgment of the Filling Body

Yan Dongfei1，Ma Fengshan1，Zhang Yamin1，Guo Jie1，Guo Huigao2，Wang Hu2   

  1. 1.Key Laboratory of Engineering Geomechanics，Chinese Academy of Sciences；2.No.2 Mining Area，Jinchuan Non-ferrous Metal Corporation
  • Online:2011-10-11 Published:2011-10-12

Abstract: The stability of the underhand drift cemented filling body is analyzed by using stress arch theory and beam theory，and a simple judgment formula of the stability is obtained.A filling scheme with equal cement-sand ratio is firstly proposed，and the feasibility of the new scheme is proved in a case of Jinchuan No.2 mining area.The high concentration cement filling method with the equal cement-sand ratio of 1∶6 can meet the requirements on strength，and about RMB 1.4 million yuan of costs can be saved each year.

Key words: Stability judgment of the filling body, Stress arch theory, Beam theory, Equal cement-sand ratio backfill