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1、第34卷第2期礦冶工程Vo1.34№22014年o4月MININGANDMETALLURGICALENGINEERINGApril2014自然崩落法礦巖質(zhì)量三維數(shù)字化評(píng)價(jià)方法①馮武,王李管,彭平安,裴安磊,袁睿棟。(1.中南大學(xué)資源與安全工程學(xué)院,湖南長(zhǎng)沙410083;2.中南大學(xué)數(shù)字礦山研究中心,湖南長(zhǎng)沙410083;3.長(zhǎng)沙迪邁數(shù)碼科技股份有限公司,湖南長(zhǎng)沙410083)摘要:針對(duì)傳統(tǒng)以巖體構(gòu)造調(diào)查或巖石力學(xué)試驗(yàn)處的局部RMR值來近似表征整個(gè)區(qū)域礦巖質(zhì)量存在的片面性、經(jīng)驗(yàn)性等缺點(diǎn),提出了一種礦巖質(zhì)量三維數(shù)字化評(píng)價(jià)方法。該方法以鉆孔和巖體原位調(diào)查數(shù)據(jù)為基礎(chǔ),選取巖石單軸抗壓強(qiáng)度、巖石
2、質(zhì)量指標(biāo)、節(jié)理間距、節(jié)理?xiàng)l件和地下水條件作為礦巖質(zhì)量評(píng)價(jià)指標(biāo),研究各指標(biāo)的空間變異特性,基于區(qū)域化變量最優(yōu)估值理論及RMR評(píng)價(jià)體系,將各指標(biāo)插值到離散后的礦巖空間,建立起評(píng)價(jià)區(qū)域礦巖質(zhì)量的三維數(shù)字化模型。最后以該模型為基礎(chǔ),應(yīng)用Laubscher崩落圖對(duì)礦區(qū)初始和持續(xù)崩落水力半徑進(jìn)行預(yù)測(cè)。該方法在普朗銅礦的應(yīng)用實(shí)踐表明:普朗銅礦平均RMR值為42.27,礦巖可崩性為較好一好,持續(xù)崩落水力半徑為21.6~22.6m,與生產(chǎn)實(shí)際相符,為普朗銅礦采用自然崩落法進(jìn)行大規(guī)模開采提供了支撐和依據(jù)。關(guān)鍵詞:區(qū)域化變量;地質(zhì)統(tǒng)計(jì)學(xué);巖體質(zhì)量評(píng)價(jià);自然崩落法;崩落水力半徑中圖分類號(hào):TD853文獻(xiàn)標(biāo)識(shí)碼
3、:Adoi:10.3969/j.issn.0253~6099.2014.02.002文章編號(hào):0253—6099(2014)02—0004~06EvaluationofRockMassQualityinBlockCavingwith3DDigitaIizati0nMethodFENGWu’’,WANGLi.guan,'。,PENGPing.a(chǎn)n,,,PEIAn—lei,’。,YUANRui—dong(1.SchoolofResourcesandSafetyEngineering,CentralSouthe,Changsha410083,Hunan,China;2.ResearchCen
4、terofDigitalMine,CentralSouthUniversity,Changsha410083,Hunan,China;3.ChangshaDigitalMineInfotechCoLtd,Changsha410083,Hunan,China)Abstract:LocalRMRobtainedfromrockmechanicsinvestigationorexperimentisgenerallyusedtoapproximatelyrepresentrockmassqualityoftheentireminingarea,whichisusuallyone—sideda
5、ndempirica1.Anevaluationwith3Ddigitalizationmethodwaspresented,inwhichrockuniaxialcompressivestrength,RQD,jointspacing,jointstatusandgroundwaterstatusaretakenasparametersbasedondrillingandin·situsurveydataforevaluatingrockmassqualityandthespatialvariabilityofeachparameterisanalyzed.Withthetheory
6、ofoptimizedvaluationofregionalizedvariablesandtheevaluationsystemofRMR,anevaluationmodelwith3DdigitalizationisestablishedtopredictthehydraulicradiusforinitialandsustainedcavinginundergroundminingbasedontheLaubschercavingchart.ThepracticalapplicationofthismethodinPulangCopperMinegavethefollowingr
7、esults:theaverageRMRofPulangCopperMineis42.27,orebodyshowssomesortofgoodcavability,andthehydraulicradiusrequiredforsustainedcavingisintherangeof21.6-22.6m,whichisinagoodagreementwithpracticalproductionandprovidessuppo~orbasi