Utilization of Jinchuan Unclassified Tailings in Mine Filling

Abstract:

In order to utilize the unclassified tailings and reduce the cost of backfill in Jinchuan mine, compressive strength experiments were conducted by taking unclassified tailings as aggregating material. The influence of unclassified tailings on compressive strength was studied, and the influence of unclassified tailings on Hydration products and microstructures was analyzed by XRD and SEM also. The results show that the fine particle size and higher mud content of unclassified tailings have adverse effect on early strength, especially on 3d compressive strength, but it can mprove the long-term strength. The hydration products of the new backfill cementitious materials is mainly C-S-H gel, the flocculent C-S-H gel form dense gel-structure and bond the aggregates together form the high mechanical strength. With the new backfill cementitious materials can achieve 30% utilization of unclassified tailings in Mine Filling, and attained the goal of reducing backfill costs and protecting the environment.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 2158-2162
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.2158
• Online since: December 2014
• Authors: You Tuan Wang, Zhi Qiang Yang, Qian Gao, Mao Hui Li
• Keywords: Compressive Strength, Rod Milling Sands, Scanning Electron Microscope, Unclassified Tailings, X-Ray

References

[1] Runcang Yu. (In Chinese) Development and innovation of cemented filling technology in China [J]. China Mine Engineering, 2010, 39(5): 1-3.

[2] Cuanqin Zhao，Nailian Hu. (In Chinese) Development and application of cementing filling materials [J]. Gold，2008，29(1) : 25.

[3] Deming Zhang, Li Wang, Bin Zhao. (In Chinese) Cemented backfilling technology with unclassified tailings based on active materials [J]. China Mine Engineering, 2010, 39(2): 6-10.

[4] Lu Dong, Qian Gao, Shiqing Nan, et al. (In Chinese) Performance and hydration mechanism of new super fine cemented whole-tailings backfilling materials [J]. Journal of Central South University (Science and Technology), 2013, 44(4): 1571−1577.

[5] Wenbin Xu, Jianhua Du, Weidong Song, et al. (In Chinese) Experiment on the mechanism of consolidating backfill body of extra-fine grain unclassified tailings and cementitious materials [J], 2012, 31(5): 48-52.

[6] Bayram Ercikdi , Ayhan Kesimal, Ferdi Cihangir, et al. Cemented paste backfill of sulphide-rich tailings: Importance of binder type and dosage [J]. Cement & Concrete Composites, 2009(31): 268–274.

DOI: 10.1016/j.cemconcomp.2009.01.008

[7] Changjiang Xie, Zhexiang He, Xuwen Xie, et al. (In Chinese) Application of blast-furnace slag at zhangmatun iron mine [J]. China Mining Magazine, 1998(2): 31−35.

[8] Ayhan Kesimal, Erol Yilmaz, Bayram Ercikdi, et al. Effect of properties of tailings and binder on the short-and long-term strength and stability of cemented paste backfill [J]. Engineering Geology , 2011 (123) : 288–301.

DOI: 10.1016/j.matlet.2005.06.042

[9] Bayram Ercikdi , Ayhan Kesimal, Ferdi Cihangir, et al. Cemented paste backfill of sulphide-rich tailings: Importance of binder type and dosage [J]. Cement & Concrete Composites, 2009(31): 268–274.

DOI: 10.1016/j.cemconcomp.2009.01.008

[10] Mostafa Benzaazoua, Tikou Belem, Bruno Bussiere. Chemical factors that influence the performance of mine sulphidic paste backfill [J]. Cement and Concrete Research, 2002, (32): 1133−1144.

DOI: 10.1016/s0008-8846(02)00752-4

[11] Bayram Ercikdi, Hakan Baki, Muhammet Izki. Effect of desliming of sulphide-rich mill tailings on the long-term strength of cemented paste backfill [J]. Journal of Environmental Management, 2013 (115): 5–13.

DOI: 10.1016/j.jenvman.2012.11.014