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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (5): 13-18.doi: 10.11872/j.issn.1005-2518.2016.05.013

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Experiment Research on Slurry Setting Time’s Effect on High-sulphur Backfill’s Compressive Strength

LAN Zhipeng，WANG Xinmin，WANG Hongjiang，CHEN Qiusong   

  1. School of Resources and Safety Engineering，Central South University，Changsha    410083，Hunan，China
  • Received:2015-12-30 Revised:2016-02-18 Online:2016-10-28 Published:2016-12-27

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Abstract:

To explore the relationship between slurry setting time and compressive strength of high-sulphur backfill，an laboratory experiment was carried out，on the basis of tailing’s sulfur content is 25%.The experimental data was analyzed by Origin mathematical software，and the internal microstructure of high-sulphur backfill was observed through SEM.The change law of high-sulphur’s compressive strength in the different condition of slurry setting time was studied.The results show that there is a function relationship between the slurry setting time with different age’s compressive strength of high-sulphur，which bases on the reasonable range of setting time.When the setting time shortened by 15.49%，the early strength increased by 136.17%，but the long-term strength decreased by 19.63%.On the contrary，when the setting time extended by 9.8%，the long-term strength increased by 40.48%，and the long-term strength’s growth pattern was similar to index type.The essence of reducing lost of high-sulphur’s long-term strength is to ensure the uniformity of the microstructure.The research results of this paper can provide reference for high-sulphur mine’s filling work.

Key words: high-sulphur tailings, additives, setting time, compressive strength

CLC Number: 

  • TD853 

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