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1、第41卷第2期煤炭科學技術Vol?41No?22013年2月CoalScienceandTechnologyFeb.2013我國西北礦區(qū)井筒地面預注漿施工技術研究1?21?21?2陳振國?王志曉?宋雪飛(1.天地科技建井研究院?北京100013?2.北京中煤礦山工程有限公司?北京100013)摘要:為解決我國西北礦區(qū)井筒地面預注漿施工難度大的問題?通過理論分析和現(xiàn)場試驗的方法對紅二煤礦副井地面預注漿技術進行研究?在井筒開鑿前上部表土段采用凍結法施工?下部基巖段采用地面預注漿技術進行堵水?并采用直型鉆孔和S型
2、鉆孔相結合的施工方法?實現(xiàn)了注漿、凍結、永久井架豎立的“三同時”平行作業(yè)?結果表明:巖帽段注漿終壓值均大于1?5倍的同層位靜水壓力值?基3巖注漿段各孔各注漿段注漿終壓均超過2倍的靜水壓力值?全井筒平均注入量為53?9m/m?注漿總333量19227m?超出設計注漿量3606m?壓水試驗測得井筒注漿段剩余涌水量為2?3m/h?施工總工期比設計工期提前58d?地面預注漿既保證了工程質量?又縮短了施工工期?關鍵詞:地面預注漿?黏土水泥漿?特殊鑿井?注漿壓力?注漿量?平行作業(yè)中圖分類號:TD262文獻標志碼:A文章
3、編號:0253-2336(2013)02-0034-04StudyonConstructionTechnologyofSurfaceGroundPre-GroutingforMineShaftsinNorthwestChinaMiningArea1?21?21?2CHENZhen ̄guo?WANGZhi ̄xiao?SONGXue ̄fei(1.ResearchInstituteofMineConstruction?TiandiScienceandTechnologyCompanyLtd.?Beijing100
4、013?China?2.BeijingChinaCoalMineEngineeringCompanyLtd.?Beijing100013?China)Abstract:Inordertosolvethehighdifficultconstructionofthepre-groutingatsurfacegroundformineshaftinChinaNorthwestminingArea?thetheoreticalanalysisandsitetestmethodwasappliedtothestudy
5、onthepre-groutingtechnologyatsurfacegroundforamineaux ̄iliaryshaftofHong?erMine.Beforethemineshaftsinking?thetopoverburdensoilsectionwasconstructionwithagroundfreezingmethodandasforthelowbaserocksection?apre-groutingtechnologyatthesurfacegroundwasconducteda
6、sthewatersealingmeasure.Theverti ̄calboreholesandStypeboreholescombinedconstructionmethodwasappliedtorealizethesimultaneousoperationsofthegrouting?groundfreezingandminepermanentheadframeinstallation.Theresultsshowedthatthefinalgroutingpressurevalueattherock
7、cushionsectionwas1.5timeshigherthanthehydrostaticpressurevalueofthesamestratumlevel?allfinalgroutingpressurevalueofeachgroutingbore ̄holeatthebaserockgroutingsectionwastwotimeshigherthanthehydrostaticpressurevalue?theaveragegroutingvalueofthemineshaft333was
8、53.9m/mandthetotalgroutingquantitywas19227m?whichwas3606moverthedesignedgroutingquantity.Theresidualwater3inflowvalueatthegroutingsectionofthemineshaftwas2.3m/hobtainedfromthepressurizedwatertest.Thetotalcons