Influencesofbenchheightofanopen-pitcoalmineoncastpercentage

LI Xiang-long; LIU Dian-shu; HE Li-hua; LUAN Long-fa; ZHANG Zhi-yu

doi:10.11883/1001-1455(2012)02-0211-05

Volume 32 Issue 2

May 2014

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LI Xiang-long, LIU Dian-shu, HE Li-hua, LUAN Long-fa, ZHANG Zhi-yu. Influencesofbenchheightofanopen-pitcoalmineoncastpercentage[J]. Explosion And Shock Waves, 2012, 32(2): 211-215. doi: 10.11883/1001-1455(2012)02-0211-05

Citation:

LI Xiang-long, LIU Dian-shu, HE Li-hua, LUAN Long-fa, ZHANG Zhi-yu. Influencesofbenchheightofanopen-pitcoalmineoncastpercentage[J]. Explosion And Shock Waves, 2012, 32(2): 211-215. doi: 10.11883/1001-1455(2012)02-0211-05

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Influencesofbenchheightofanopen-pitcoalmineoncastpercentage

doi: 10.11883/1001-1455(2012)02-0211-05

1.
FacultyofLandResourcesEngineering,KunmingUniversityofScienceandTechnology,
2.
Kunming 650093,Yunnan,China;
3.
Schoolof Mechanics& CivilEngineering,ChinaUniversityof Mining & Technology,

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Corresponding author: LI Xiang-long
Publish Date: 2012-03-25

Abstract

Abstract

Abstract:Heidaigouopen-pitcoalminewaschosenasanexampletoexploretheinfluencesofbench heightoncastblastinginopen-pitcoalmines.Theoreticalanalysesandsitetestswerecarriedout,respectively. Investigatedresultsdisplaythatwiththeincreaseofthebenchheight,themaximumcast distanceoftheblastmuckpileaswellasthecastpercentageincreases,andtheshapeoftheblast muckpilebecomessmoother,ontheotherhand,thehigherthebench,themoreslowlythecastpercentageincreases. Whentheunitexplosiveconsumptionisequalto0.70kg/m3andthebenchishigherthan37m, withtheincreaseofthebenchheight,thecastpercentageincreasesslowly,evenstays at47percent.Here,itissubjecttomineconditionsandminingequipments,whichsimplyraisesthe benchheighttoobtainahighercastpercentage.
- mechanicsofexplosion,
- benchheight,
- castblasting,
- open-pitcoalmine,
- blastmuckpile shape,
- castpercentage