資源描述：
《低貧化放礦在上青礦的應(yīng)用分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、東北大學(xué)碩士學(xué)位論丈ABSTRACTTheapplicationandresearchofthelowdilution—givingmineralinShangqingMiningAbstractThetheoriesandexperimentsstudyhaveindicatedthatundertheconditionthatthetotalorerateofrecoveryisstable，thedilutionrateoftheorecanbeloweredinalargedegreeafterusin
2、gthelowdilutionwaytomine．BecausetheproducingsystemoftheShangqingmininghasbeeninafullburdenstate，inordertoincreasetheeconomicbenefitsofthecompany，improvingthequantityoftheraworeistheimportantmethod．Thenwecontroltheminingfromusingthelowdilutionwayinthefitplace
3、basedonthegeologyandminingcondition．Theresearchofthisthesishasbeguninthesecondhalfof2002，thereareninesegmentsintheriverbedmineralpillarandfoursegmentsremainedoreinthenorthpitoneandpittwocanbeminedin2003，becausethehavingamountofmineralisample，webegantomineint
4、hewayoflowdilution．ThishashadallimportantroleinstablingtheoregradeintheconditionofincreasingtheyieldinShangqingmining．Atthesametimewehadallanalysisandcalculationaboutthedistricts，wediscoveredthatthereareonlytwoorthreesegmentscanbemined，iftheplanofminingisin2
5、008．thehavingamountisnotample，thefurtherminingwillmaketherawore、theconcentrateandtheeconomicbenefitslower，SOtheminingplanisdelayed．Thedeepopeningengineeringbeganin2003，itissurethattheopeningsystemin520—540levelwillbecompletedintoproducein2007，thetimewillbesh
6、ortedoneyear．AtthesametimetheShangqingmininghashadanadjustmentabouttheplanningyieldaboutthekindsofthesegments．Theyieldsoftheriverbedareenlargedandtheotherdistrictsarereduced．Iftheminingisinthecutoffgradethemineamountwillbeampleabovetheleveloftheopening．Thisw
7、illmakethelowdilutionbecomepossibleButhowtodecidethecutoffgradeisthequestion．Thiswillinfluencetherecoveryindex．Becauseoftheshortageoftheresourcematerials，webeganaspecializedresearch東北大學(xué)碩士學(xué)位論文ABSTRACTabouttheconditionofthemininginShangqingmimng．Thisthesishase
8、laboratedtherelatedorerecoveryindexinfluenceinvariouscutoffgradesfromtheexperimentsandresearches．Theresulthadindicatedthatiftheenteringdistanceislongerthanthesegmentsheightandtheminingdistanceis
