文献类型：期刊文献

英文题名：Properties of Gobi Aggregate and Sulfide-Rich Tailings Cemented Paste Backfill and Its Application in a High-Stress Metal Mine

作者：Deng, D. Q. Liang, Y. H. Huangfu, F. C.

第一作者：Deng, D. Q.

通信作者：Deng, DQ[1];Deng, DQ[2];Liang, YH[3]

机构：[1]Xiangtan Univ, Sch Civil Engn & Mech, Xiangtan 411105, Hunan, Peoples R China;[2]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Planning & Finance Div, Guiyang 550003, Guizhou, Peoples R China;[4]Xinjiang Ashele Copper Co Ltd, Altay 836700, Xinjiang, Peoples R China

第一机构：Xiangtan Univ, Sch Civil Engn & Mech, Xiangtan 411105, Hunan, Peoples R China

通信机构：corresponding author), Xiangtan Univ, Sch Civil Engn & Mech, Xiangtan 411105, Hunan, Peoples R China;corresponding author), Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Guizhou, Peoples R China;corresponding author), Guizhou Inst Technol, Planning & Finance Div, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;贵州理工学院矿业工程学院;

年份：2021

卷号：2021

外文期刊名：ADVANCES IN CIVIL ENGINEERING

收录：;Scopus(收录号：2-s2.0-85102029940);WOS:【SCI-EXPANDED(收录号:WOS:000625324300004)】；

基金：The authors gratefully acknowledge the support for this research from the National Natural Science Foundation of China (51764009), the Guizhou Province Science and Technology Support Plan Project (Grant No. [2018]2836), the Scientific Research Fund of Hunan Province Education Department (20A475), and the High-level Talent Gathering Project in Hunan Province (2019RS1059).

语种：英文

摘要：This experiment studied the influence law of the strength of CPB affected by tailings content, Gobi aggregate content, cement content, and slurry concentration. The results show, for the CPB with concentration of 77%, when the addition amount of cement reaches 20%, the addition amounts of tailings and Gobi aggregate change within the ranges of 12 similar to 24% and 56 similar to 68%, respectively. The strength of CPB has been gradually improved when the addition amount of Gobi aggregates decreases and the addition amount of tailings increases. In this case, the slump of CPB changes within the range of 26.5 cm similar to 26.9 cm while the strength of CPB changes within the range of 4.021 similar to 6.845 MPa. Considering future utilization value of tailings, the addition amount is finally set at 16% in production, and the addition amount of Gobi aggregate is set at 64%; namely, tailings: Gobi aggregate = 20 : 80. When the addition amount of cement is 20% (cement/(tailings + Gobi aggregates) = 1 : 4), the strength of CPB reaches 5.62 MPa which meets the production requirement. When the heading machine is used for tunnelling mine roadway in bottom backfill of VCR stope, no collapse or delamination occurs without support, showing good stability and integrity of backfill. When the adjacent stope ore is mined, the backfill with cement content of 11.1%, 14.3%, 20%, and 25% is exposed. In the process of mining, no collapse or delamination occurs. Therefore, the proportion of various backfill materials applied in production is reasonable, being verified by the experiment and field test.