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Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (4): 85-88.doi: 10.11872/j.issn.1005-2518.2014.04.085

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Practice of Afterwards Back-filling Mining of Sublevel Caving Medium-Deep Hole

YU Changxian,HE Shunbin,YANG Shanghuan,HUANG Wei   

  1. Sanshandao Gold Mine,Shandong Gold Mining (Laizhou) Co.,Ltd.,Laizhou    261442,Shandong,China
  • Received:2014-05-25 Revised:2014-06-13 Online:2014-08-28 Published:2014-12-24

Abstract:

To improve mining intensity of the medium thickness orebody which under -600 m in Sanshandao gold mine,the method of the filling mining afterwards segmentation ore dropping out of the medium-length hole was adopted.First of all,in the bottom of stope upper-panel and top column,the support system and roadway were established respectively to carry on the preliminary support of the long anchor cable and to ensure the stability of the surrounding rock on upper-plate and the stope top column effectively.Secondly,in the graded blasting process of sublevel stope mining,the workers went into the stope by supporting roadway and then conducted the roof maintenance,which ensured the stope roof safety.Finally,filling immediately when the recovery of sublevel stope mining completely,which shortened exposure time of the goaf and reduced the movement of surrounding rock.Practice has proved that the mining method have the great capacity of production,the advantages of high efficiency,and low cost of mining safety,it had created huge economic and social benefit and meet the need of the mine production scale expansion.

Key words: deep mining, uptake medium-length hole, supporting roadway, preliminary support of the long anchor cable, safety and efficiency

CLC Number: 

  • TD853.34

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