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Metal Mine ›› 2014, Vol. 43 ›› Issue (02): 12-16.

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Reasonable Mining Technology of Football Residual Ores in Pillarless Sublevel Caving of Gently Inclined Medium Thickness Ore-body

Sun Wenyong,Chen Xingming,Wang Wei,Zhang Zhigui   

  1. School of Environment and Resource,Southwest University of Science & Technology, Mianyang 621010,China
  • Online:2014-02-15 Published:2014-04-21

Abstract: The proportion of footwall residual ores and the particularity of ore recovery in footwall residual ores for the ore recovery results′s influence were analyzed detailedly.The analysis results show that:the proportion of footwall residual ores mainly affected by the orebody occurrence conditions and the structural parameters of the mining method;the thickness of orebody more smaller,the dip of orebody more slowly,the structural parameters of the mining method more larger,the proportion of footwall residual ores would more lager,and the recovery results of the footwall residual ores would more worse caused by the ore and rock mining mixed; the key to guarantee the footwall residual ores full recovery and have a good ore recovery results was improved the ming technology in the footwall fo orebody.In addition, this paper according to the problem that the footwall residual ores didn′t recover fully and the ore recovery results too poor in traditional footwall cutting stopping technology put forward a new method that use the footwall cutting stopping technology combined with the assistant mining entrance stoping technology in the footwall column of head piece-wise′s two mining entrance to mining the footwall residual ores and increased the independent advance of ore breaking and the lateral opening angle to reduce the ore lose and dilution measures,would be an meaningful example of the relevant mine.

Key words: Gently inclined medium thickness ore-body, Pillarless sublevel caving, Football residual ores, Reasonable mining technology