Strength sensitivity and failure mechanism of full tailings cemented backfills

被引：0

作者：

Fu, Jian-Xin ^{[1
,2
]}

Du, Cui-Feng ^{[1
,2
]}

Song, Wei-Dong ^{[1
,2
]}

机构：

[1] Key Lab. of the Ministry of Education of China for High-efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing

[2] School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing

来源：

Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | 2014年 / 36卷 / 09期

关键词：

Cemented backfill; Failure; Quantitative analysis; Sensitivity; Strength; Tailings;

D O I：

10.13374/j.issn1001-053x.2014.09.004

中图分类号：

学科分类号：

摘要：

Full tailings cemented backfills were produced by taking Daye iron ore tailings as a raw material and cement as a cementing material. The relations of the backfills' strength with slurry concentration, sand-to-lime mass ratio and curing period, together with the sensitivity of the backfills' strength to these influencing factors, were studied by using single-factor five-level experiment design. The strength of the backfills follows an exponential function with slurry concentration and curing period, but a linear function with sand-to-lime mass ratio. Moreover, the sensitivity of the backfills' strength to curing period is the highest, but is the weakest to sand-to-lime mass ratio. Compressive failure test results show that destruction of the backfills goes through four stages, including micro-crack closure stage, linear elastic stage, micro-crack propagation stage, and crack coalescence stage.

引用

页码：1149 / 1157

页数：8

共 13 条

[1]

Wang X.G., Tang K.Y., Overview of cut and fill method for mines, 12, 12, (2008)

[2]

Yu R.C., Development and innovation of cemented filling technology in China, 39, 5, (2010)

[3]

Hu H., Sun H.H., Development of backfill technology and the new backfill process using paste-like material, 10, 6, (2001)

[4]

Benzaazous M., Fall M., Belem T., A contribution to understanding the hardening process of cemented pastefill, 17, 2, (2004)

[5]

Liu Z.X., Li X.B., Chaotic optimization of tailings gradation, 36, 4, (2005)

[6]

Li D.Q., Yang C.X., Shi S.H., Research of the application of total tailing high density backfilling technology in deep underground mine, 7, (2009)

[7]

Fall M., Benzaazous M., Ouellet S., Experimental characterization of the influence of tailings fineness and density on the quality of cemented paste backfill, 18, 1, (2005)

[8]

Song W.D., Li H.F., Lei Y.K., Et al., Experiment research on the performance of cemented whole-tailings filling material in Chengchao Iron mine, 32, 1, (2012)

[9]

Li Y.F., Zhang J.M., Deng F., Et al., Experimental study on strength characteristics of tailings cement backfilling at deep-seated mined-out area, 26, 6, (2005)

[10]

Deng D.Q., Gao Y.T., Wu S.C., Et al., Experimental study of destructive energy dissipation properties of backfill under complicated stress condition, 31, 3, (2010)

← 1 2 →