采煤塌陷区煤矸石回填复垦技术-论文.pdf

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1、SeriesNn459金氍矽山总第459期September2014METALMINE2014年第9期采煤塌陷区煤矸石回填复垦技术陈利生李学良(中煤科工集团唐山研究院有限公司，河北唐山063012)摘要利用废弃煤矸石回填采煤塌陷区建筑用地，是一条矿区综合治理的有效途径，既减轻了煤矸石对环境的污染，又降低了地基建设成本。运用室内试验与工程实践相结合的方法，对煤矸石的物化性质、力学性质、工程性质等进行研究分析，初步建立了煤矸石回填建筑用地可行性分析、复垦场地选址、复垦场地规划、回填标高与覆土厚度确定、回填地基处理、复垦分区

2、与施工、地基承载力检测等一套完整的复垦体系。结果表明：在进行矸石回填地基处理时，宜选择已经稳沉的区域，避免二次变形对地基稳定性的影响；对项目区分区、分块进行施工，提高矸石利用率；在地基处理时，采用分层回填、多次振压处理的方法，经振动压实处理后，煤矸石地基的承载力远远大于天然土地基，完全能够满足建筑工程需要。关键词采煤沉陷区煤矸石地基处理施工工艺承栽力测试中图分类号TD853文献标志码A文章编号1001-1250(2014)-09—137-05TechniquesofGangueBackf'fllingandReclam

3、ationinSubsidenceRegionofCoalMinedChenLishengLiXueliang(TangshanResearchInstitute，ChinaCoalTechnologyandEngineeringGroupc0，Tangshan063012，China)AbstractUsingcoalgangueasthebackfillmaterialofbuildingfoundationisallefectivewayofcomprehensivetreat—mentofminingarea，

4、whichnotonlyreducestheenvironmentalpollutionofcoalganguebutalsoreducedthefoundationcon—structioncost．Components，physicalproperties，mechanicalpropertiesanden~neerpropertiesofcoalganguewerestudiedandanalyzedbyusingthemethodsoflaboratorytestsandtheproject．Asetofint

5、egratedreclamationsystemwasprimarilybuilt，in-cludingfeasibilityanalysis，reclamationsiteselection，reclamationsiteplanning，backfillingelevationandsoilthicknessdeter—mination，backfillfoundationtreatment，reclamationpartitionandconstruction，andbearingcapacitydetectio

6、nofthefoundation．Theresultsshowedthattoavoidthetwo—stagedeformationinfluenceonfoundationstability，astabilizedregionshouldbeselect-ed．Thepartitionconstructioninthepmjectareaisadoptedtoimprovetheutilizationrateofcoalgangues．Duringtheprocessofthefoundationtreatment

7、，themethodsofstratifiedbackfillandmultiplevibrationtreatmentsareusedSOthatthebearingcapaci—tyofcoalganguefoundationisfargreaterthanthenaturalfoundationaftertreatmentbyvibrationandcompaction．Itisfullya—bletomeettheneedofconstructionproject．KeywordsSubsidenceregio

8、nofcoalmined，Coalgangue，Foundationtreatment，Constructiontechnology，Bearingcapac-itytest随着我国经济的高速发展，土地供应变得越来越消除其对环境的污染，也能为煤矿减轻了矸石处理的紧张，尤其是对于土地本来就偏少的南部地区，经济负担。利用煤矸石回填采煤