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1、6306運輸巷施工上向順層鉆孔安全技術措施根據(jù)礦井抽采部署要求，在6306運輸巷施工上向順層鉆孔，為保證6306運輸巷施工上向順層鉆孔時的安全，特編制此安全技術措施，相關部門必須遵照本措施執(zhí)行，（注：本措施只針對6306運輸巷磧頭順層長孔抽放期間施工上向順層鉆孔，6306運輸巷貫通后施工上向順層鉆孔安全技術措施另行編制。）一、鉆孔施工工藝及要求（一）鉆孔施工工藝采用ZYG-750C型鉆機、φ75mm鉆頭、刻槽鉆桿加中風壓排粉施工順層鉆孔。（二）鉆孔布置6306運輸巷全長約411m，鉆孔從-60mS2以南4m開始布置1號孔，鉆孔間距2.4m，設計深度100m，共設計1
2、70個鉆孔，鉆孔沿煤層真傾斜向上施工。（附件1：6306運輸巷施工上向順層鉆孔布置圖）（三）施工要求1.運輸巷上向順層孔施工前，打鉆隊首先對現(xiàn)場需施工的鉆孔由北向南依次進行編號并掛牌，施鉆時，按鉆孔編號由南向北依次施工；打鉆隊施工時嚴格按放線法施工。2.鉆孔施工過程中，只準1臺鉆機施工，施鉆地點人員不得超過3人。3.鉆孔施工前，由機電區(qū)提前形成抽放管路，每竣工一個鉆孔Pileboredpilecanbeused,andartificialdiggingpile,prefabricatedreinforcedconcretesheetpilesorsheetpile,
3、andsoon.Whenexcavationdepthislarge,youcansetmultichannelsupport,toreducestress,rushdrillingthroughrock,theoldbase.InretainingpilewaterjetGroutingcurtainbetweeneffects,butbecauseofthedepthofexcavationwithinthegreatwallcouldnotanchororsupport,boltcannotconstruction,bolt,NorthandSouthwoul
4、dnotbesymmetricalonbothsidesusepiles,insettingupasupportwithouttheappropriatesupportmethods.2.1.4channelsteelsheetpilewhichisasimplesteelsheetpileretainingwallprosandconsbychannelsteelbucklelaporside-by-sidecomponents.Channel6~10mlong,modeldeterminedbycalculation.Features:steelwithgood
5、durability,pitconstructionchannelcanbepulledoutafterthecompletionofbackfillsoilrecyclingtouseagain;Convenient,short;Impervioustowaterandsmallparticlesinthesoil,inareaswithhighwaterorrain-proofmeasuresareneeded;Bendingstrengthisweak,andmoreforthedepthofshallowFoundationpitislessthan4m,o
6、rGroove,supportorpulledtogethershouldbeinstalledatthetopanchor;Supportingstiffnessofsmalldeformationafterexcavation.2.1.5boredpileretainingwallonboredpileistheup-pilehasbeenwidelyusedinChina.Itsmorefortheexcavationofthepit7~10m,ingoodsoilintheNorthareaofChinahas8~9marmpileretainingwall
7、.Drillingperfusionpilesupportnursingwallbodyoffeatureshas:constructionShinovibration,andnonoise,environmentpollution-,nosqueezesoilphenomenon,onaroundenvironmenteffectsmall;wallbodystrengthhigh,stiffnessbig,supportnursingstabilitygood,9由打鉆隊進行及時封孔接抽。4.施工該磧頭上向順層鉆孔滯后磧頭距離不小于20m。5.施工時，打鉆隊
