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1、6306運(yùn)輸巷施工上向順層鉆孔安全技術(shù)措施根據(jù)礦井抽采部署要求，在6306運(yùn)輸巷施工上向順層鉆孔，為保證6306運(yùn)輸巷施工上向順層鉆孔時(shí)的安全，特編制此安全技術(shù)措施，相關(guān)部門必須遵照本措施執(zhí)行，（注：本措施只針對(duì)6306運(yùn)輸巷磧頭順層長(zhǎng)孔抽放期間施工上向順層鉆孔，6306運(yùn)輸巷貫通后施工上向順層鉆孔安全技術(shù)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(jī)、φ75mm鉆頭、刻槽鉆桿加中風(fēng)壓排粉施工順層鉆孔。（二）鉆孔布置6306運(yùn)輸巷全長(zhǎng)約411m，鉆孔從-60mS2以南4m開(kāi)始布置1號(hào)孔，鉆孔間距2.4m，設(shè)計(jì)深度100m，共設(shè)計(jì)1
2、70個(gè)鉆孔，鉆孔沿煤層真傾斜向上施工。（附件1：6306運(yùn)輸巷施工上向順層鉆孔布置圖）（三）施工要求1.運(yùn)輸巷上向順層孔施工前，打鉆隊(duì)首先對(duì)現(xiàn)場(chǎng)需施工的鉆孔由北向南依次進(jìn)行編號(hào)并掛牌，施鉆時(shí)，按鉆孔編號(hào)由南向北依次施工；打鉆隊(duì)施工時(shí)嚴(yán)格按放線法施工。2.鉆孔施工過(guò)程中，只準(zhǔn)1臺(tái)鉆機(jī)施工，施鉆地點(diǎn)人員不得超過(guò)3人。3.鉆孔施工前，由機(jī)電區(qū)提前形成抽放管路，每竣工一個(gè)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(duì)進(jìn)行及時(shí)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(shí)，打鉆隊(duì)
