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时间:2020-05-23
《矿山排土场稳定性主动调控机制研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、SeriesNo.459金属矿山总第459期September2014METALMINE2014年第9期·采矿工程·矿山排土场稳定性主动调控机制研究米子军(太原钢铁(集团)有限公司岚县矿业公司,山西岚县030027)摘要矿山排土工艺正朝高阶段排土、高强度排土和设备大型化方向发展。伴随而来的是排土平台或其地基失稳剧增,如降低堆置高度则容量减少,如加固或清除地基软土层,巨额的工程费用又难以承受。分析了矿山排土场拦碴坝、坡脚挡墙等被动的过程调控措施的实用性,评价了排(截)水沟的有效性;基于对环境的影响后果,从排土场边坡与基底的相互作用机理出发,采用允许变形和部分破坏的设计原则。基于空间
2、效应,构架了合理使用排土空间,调整排土场形成过程的时空关系的主动调控机制:①对凸形排土场应控制排弃强度,确保土场沉降正常,以废石流量为安全调控关键指标;②对软弱地基,首要是控制第一层排土段高,采用堆载预压原理提高基底承载力,作为上覆土场基础,规避大面积清除软基层;③当场址内梁、谷交错且地基软弱,对称均衡纵向推进的排土,可规避侧向挤压作用触发的牵引式滑坡危害。同时,利用分区间隔点排法和基于界面疏导原理,构筑的泄流基底确保降雨不诱发排土场滑坡及突变成泥石流。经过现场试验论证,利用排土工艺的主动调控方法符合矿山需求,可兼顾安全性和经济性。关键词排土场稳定性地质灾害治理时空效应主动调控机
3、制中图分类号TU443文献标志码A文章编号1001-1250(2014)-()9_()01-06ActiveRegulationMechanismofMineWasteDumpStabilityMiZijun(LuanxianMiningCompany,TaiyuanIron&Steel(Group)Co.,Ltd.,Luanxian030027,China)AbstractThehighbenchandhighintensitydumping,large—scaledumpingequipmentarebecomingthedevelopmenttendencyformined
4、ump.Consequently,thedumpbenchinstabilityorother~undationfailureriserapidly,thatis,thedumpca-pacitydecreaseswiththedumpheightlowered,andstrengtheningorcleaningthesoftlayeroffoundationresultsinvastprojectcosts.Thepracticalityofthepassivecontrolmeasures,suchasdebrisdam,retainingwallattoe,Wasanal
5、yzed,andthevalidityofthedrainwasevaluated.Basedontheenvironmentalprotection,andstartingwithinteractioncharacteristicsbetweenthewastedumpandthe~undation,thedesignprincipleofdeformationandlocalfailureallowancewasproposed.Activeregulationmechanismwasestablishedaccordingtospatialeffect,thatsetsup
6、areasonabledumpspaceandadjuststime-spacerelationduringwastedumpsemission.①Onthewastedumpwithconvexslope,theemissionintensitymustbecontrolledtoensurenor—malconsolidationandsettlement.andthewastedisposaldischargebetakenasthekeyadjustingandcontrollingindex.②Onthewastedumpwithsoftground,thefirstd
7、umpbenchheightshouldbelimited,andthebearingstrengthofthe~undationshouldbeimprovedbypreloadingprinciple,regardingitasthebaseofthenextbenchandavoidingfromwide—spreadcleanupofthesoftsoillayer.(~)Whentheridgesandgulchesarecriss—crossedinthesite,a
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