›› 2010, Vol. 31 ›› Issue (12): 4011-4015.

• Numerical Analysis • Previous Articles     Next Articles

Numerical simulation of abutment pressure distribution of C-shaped stope

LIU Jin-hai1, JIANG Fu-xing1, FENG Tao2   

  1. 1. School of Civil & Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, China; 2. School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China
  • Received:2010-01-27 Online:2010-12-10 Published:2010-12-21

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Abstract:

The occurrence of rock burst is related to the distribution of abutment pressure. In order to study dynamic variation laws of abutment pressures of C-shaped stope, vertical stress fields in coal mass during advancing process of island working face were simulated. The plane distribution characteristics of abutment pressures and the dynamic evolution characteristics of strike abutment pressures and lateral abutment pressures in coal mass were analyzed; and conclusions were drawn as follows: (1) the distribution of vertical stress in coal mass is C-shaped; (2) the influence distance of lead abutment pressure of island working face is 3-5 times higher than that of normal working face; (3) the peak of abutment pressure reaches its maximum when the advanced distance of the working face is equal to the length sum of two nearby working faces. Finally, the engineering example was analyzed. The results can provide a basis for prediction and control of rock burst.

Key words: rock burst, C-shaped stope, abutment pressure, distribution characteristics, numerical simulation

CLC Number: 

  • TD 35
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