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《霍各庄南矿段地下开采中露天境界顶底帮稳定性分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第35卷第6期矿冶工程V0l-35№62015年12月MININGANDMETALLURGICALENGINEERINGDeeember2015霍各庄南矿段地下开采中露天境界顶底帮稳定性分析①刘艳章,潘世华,陈小强,邹晓甜,张群,张丙涛(1.武汉科技大学资源与环境工程学院,湖北武汉430081;2.武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北武汉430081)摘要:针对霍各庄矿区南矿段从露天开采转入地下开采时已有露天边帮的稳定性问题,选取霍各庄矿区南矿段典型勘探线剖面处露天境界最终边帮建立了模型,运用有限元强度折减法找到了已有露天边帮的潜在滑移面,采用边坡稳
2、定矢量分析法对该露天境界顶、底帮在各个工况下的稳定性状态进行了分析。分析表明:边坡稳定矢量分析法可同时求解露天境界顶、底帮在潜在滑移面方向的安全系数;该矿段露天边帮在露天开采结束时状态稳定;露天境界顶帮的安全系数随地下开采向下延伸不断变小,并在地下开采首中段时产生失稳破坏;整个地下开采过程中,露天境界底帮的安全系数受采动影响较小,边帮一直处于稳定状态。关键词:地下开采;露天境界顶帮;底帮;边坡稳定性;矢量分析法;应力分析;安全系数中图分类号:TD853文献标识码:Adoi:10.3969/j.issn.0253—6099.2015.06.006文章编号:0253—6099(
3、2015)06—0025—05StabilityAnalysisfortheTopandFloorofSurfaceBoundarySlopeattheSouthernCornerofHuogezhuangMineforUndergroundMiningLIUYan—zhang’,PANShi—hua,CHENXiao—qiang,Z0UXiao-tian,ZHANGQua,ZHANGBing—tao(1.SchoolofResourceandEnvironmentalEngineering,WuhanUniversityofScienceandTechnology,Wuh
4、an430081,Hubei,China;2.HubeiKeyLaboratoryforEfficientUtilizationandAgglomerationofMetallurgicMineralResources,WuhanUniversityofScienceandTechnology,Wuhan430081,Hubei,China)Abstract:Duetothetransitionofopen-pitminingtoundergroundminingatthesouthemcornerofHuogezhuangminingarea,theultimatepit
5、slopeatthecrosssectionalongthetypicallineofexplorationwastakenformodeling.Then,thepotentialslidingplaneofexistingopen—pitslopewasdeterminedbyusingshearstrengthreductionfiniteelementmethod,andthestabilityofthetopandfloorofsurfaceboundaryslopeunderdifferentworkingconditionswasanalyzedwithvec
6、toranalysismethod.Resultsshowthatthesafetyfactorofthetopandfloorofsurfaceboundaryslopealongthedirectionofpotentialslidingplanecanbedeterminedwiththevectoranalysismethod.Theopen-pitslopeatthesoutherncornerwillbekeptstableatthefinishofsurfacemining,whilethesafetyfactorofthepittoptendstobesma
7、llerastheundergroundminingadvancingdownwardsandtheinstabilityandfailureonthetopwillbeoccu~edduringthefirststageofundergroundmining.However,safetyfactorofthepitfloorwillbelessinfluencedthroughthewholeundergroundmining,withthesloperemainingstableatal1.Keywords:u
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