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时间:2019-05-27
《万福煤矿深部水压致裂地应力测量》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第25卷第5期岩石力学与工程学报Vol.25No.52006年5月ChineseJournalofRockMechanicsandEngineeringMay,2006万福煤矿深部水压致裂地应力测量11,23111蔡美峰,陈长臻,彭华,纪洪广,乔兰,谭卓英(1.北京科技大学土木与环境工程学院,北京100083;2.兖煤菏泽能化有限公司,山东菏泽274000;3.中国地质科学院地质力学研究所,北京100080)摘要:为了克服煤田上覆冲击层厚度高达700m所造成的困难,保证超千米深部地应力测量的成功,对传统水压致裂法测量方法和设备进行改进,增加测量系统的耐压能力和测试系统的精度。在完成的7
2、个钻孔、37个测点的现场实测中,6个钻孔的深度接近和超过1100m,最大测点深度为1105m,创造了我国水压致裂法测量地应力钻孔深度的新记录。通过实测,确定了矿区的地应力状态及其分布规律。研究结果表明,37个测点的最大水平主应力与垂直主应力的比值为1.441~3.224,平均为1.97,反映了矿区地应力场以水平应力为主导的特点。测量结果可为矿山建设和开采设计提供科学的依据。关键词:岩石力学;水压致裂法;改进技术;地应力测量;超千米深部中图分类号:TD311文献标识码:A文章编号:1000–6915(2006)05–1069–06IN-SITUSTRESSMEASUREMENTBYHYD
3、RAULICFRACTURINGTECHNIQUEINDEEPPOSITIONOFWANFUCOALMINE11,23111CAIMeifeng,CHENChangzhen,PENGHua,JIHongguang,QIAOLan,TANZhuoying(1.SchoolofCivilandEnvironmentalEngineering,UniversityofScienceandTechnologyBeijing,Beijing100083,China;2.HezeEnergyandChemicalCompany,YanzhouMiningCorporation,Heze,Shand
4、ong274000,China;3.ResearchInstituteofGeomechanics,ChineseAcademyofGeologicalSciences,Beijing100080,China)Abstract:Wanfucoalmineislocatedinsouth-westofShandongProvince,China.Theoverburdensoillayerinthemineisover700mthickofthealluviumofYellowRiver.Theburialconditionofthecoallayersintheminemakesthe
5、miningverydifficult.Inordertoprovidereliableengineering-geologicalinformationfortheminingdesign,in-situstressmeasurementinthemineiscarriedout.Becausethemineisjustintheearlyexplorationstageandthereisnoentrancetoundergroundpositions,theonlyreliablestressmeasurementtechniqueinthisstageishydraulicfr
6、acturingtechnique.Tosavethemeasuringcost,thehydraulicfracturingstressmeasurementisperformedintheexplorationboreholes.Thereare29explorationboreholesinthemine,inwhich7boreholesaremeticulouslychosenforhydraulicfracturingtests.Amongthe7boreholes,6boreholesarenearorover1100mindepth,andthedeepestmeasu
7、ringpointis1105mdeep.Itisanewrecordofmeasuringdepthforin-situstressmeasurementusinghydraulicfracturingtechniqueinChina.Inordertomakethesealingandimpressionpackerstopassthethickoverburdensoillayerssmoothlyandensurethehydrauli
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