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Journal of Central South University

, Volume 19, Issue 4, pp 1086–1091 | Cite as

Rock burst induced by roof breakage and its prevention

  • Jiang He (何江)
  • Lin-ming Dou (窦林名)
  • An-ye Cao (曹安业)
  • Si-yuan Gong (巩思园)
  • Jian-wei Lü (吕建为)
Article

Abstract

Based on the research on rock burst phenomenon induced by the breakage of thick and hard roof around roadways and working faces in coal mines, a criterion of rock burst induced by roof breakage (RBRB) was proposed and the model was built. Through the model. a method calculating the varied stresses induced by roof breakage in support objects and coal body was proposed and a unified formula was derived for the calculation of stress increment on support objects and coal body under different breaking forms of roof. Whilst the formula for calculating dynamic load was derived by introducing dynamic index K d. The formula was verified in Huating Mine by stress measurement. According to the formula for stress increment calculating, the sensitivities of dynamic load parameters were further studied. The results show that the thickness and breaking depth of roof, width of support object are the sensitive factors. Based on the discussion of the model, six associated effective methods for rock burst prevention are obtained.

Key words

roof breakage dynamic load stress increment rock burst mining engineering 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jiang He (何江)
    • 1
  • Lin-ming Dou (窦林名)
    • 1
  • An-ye Cao (曹安业)
    • 1
  • Si-yuan Gong (巩思园)
    • 1
  • Jian-wei Lü (吕建为)
    • 1
  1. 1.State Key Laboratory of Coal Resources and Safe MiningChina University of Mining and TechnologyXuzhouChina

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