掺粉煤灰高密度全尾砂充填体早期强度试验

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中图分类号：TD853.34 文献标志码：A 文章编号：1004-4345（2025）04-0006-04

AbstractToivestigatetheinfluenceofflyashadditionontheearlystrengthofhigh-densityunclasifiedtailingsbackfll， uniaxialcompressvestrength tests wereconductedonhigh-densityunclasified tailings withdiferentflyash contents（ 20% ，30%， （20 40% ）froman overseas mine.By measuring thestrength ofbackfillspecimens at3dand7dages under varying cement-sandratios andpasteconcentrations，theipactofflyashcontentonearly-agestrengthwasevaluated.Theresultsindicatethattheincoporation offlyashleadstoacertaineductioninearlystrength，buttheextentofreductionremainswithinaeptableengineeringliits.At fly ash content of 30% andacement -- sand ratio of 1：4，the 3 d and 7 d strengths of the backfill reached O.84 MPa and1.88 MPa， respectivelyeallfulfilggiineets.reforetialplcetofntitflhisasibecein a cost reduction of approximately 76 yuan/m³ in binding materials at this mix proportion.

Keywordshigh-density;unclassified tailings;flyash;early strength ofbackfill;uniaxialcompressivestrength

随着矿产资源大量消耗与地表资源加速减少，地下矿山已成为金属矿开采的主要方向1。（剩余4309字）