›› 2013, Vol. 34 ›› Issue (S1): 337-339.

• Geotechnical Engineering • Previous Articles     Next Articles

Critical span calculation of stope roof with waste-lifting stoping method

ZHAI Hui-chao, YAN Man-zhi   

  1. Tianxing Iron Mine, Hebei Iron Steel Group Mining Co. Ltd., Tangshan, Hebei 063000，China
  • Online:2013-08-30 Published:2014-06-09

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Abstract: Some strategies for developing mechanized production were put forward in view of the problems of great labour intensity and low production efficiencies of waste-lifting stoping method for gently inclined and extremely-thin veins. For adapting to the large-size stope structure of mechanized production, stability of stopes should be analyzed. Therefore, critical span of strope roof was calculated under the condition that caved debris was assumed to spring supporting part and stope roof was simplified as statically indeterminate cantilever beam structure with fixed-end of planar issue. At the same time, the calculation method applied in mine realizes the mechanical operation.

Key words: waste-lifting stoping method, cantilever beam, stability analysis

CLC Number: 

  • TD32
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