不同含量玻璃纤维尾砂充填体损伤规律与围岩匹配关系

doi:10.13722/j.cnki.jrme.2021.1252

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Abstract In order to improve the stability of mined-out areas after filling in a metal mine，the damage law of cemented tailings backfill with different contents(0%，0.5% and 0.7%) of glass fibers was studied. The stress-strain curves of cemented tailings backfill with different contents of glass fiber were obtained by uniaxial compression. The energy dissipation law of backfill was analyzed according to the damage constitutive equation，and its match with rock mass was obtained. The results show that：(1) in a certain range，the strength of backfill is improved with the addition of glass fiber but the elastic modulus is reduced. (2) The damage value of backfill when reaching the peak stress is reduced with adding glass fiber，but with the increase of its contents，the process of damage value reaching the maximum of backfill is slower. (3) The calculation model of peak specific energy of backfill with different contents of glass fiber is obtained，and the peak specific energy of backfill increases with the increase of contents of glass fiber. (4) Based on the filling mining of the mine，the design model of the depth of the goaf and the strength of the backfill is obtained，which can provide a scientific basis for saving the backfill cost of the mine.

Key words： rock mechanics cemented tailings backfill glass fiber initial elastic modulus damage peak specific energy

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	Articles by authors
	ZHAO Kang1
	2
	ZHAO Kangqi1
	YAN Yajing2
	ZHOU Yun1
	YANG Jian1
	WU Jun1

Cite this article:

ZHAO Kang1,2,ZHAO Kangqi1, et al. Damage law of cemented tailings backfill with different contents of glass fiber and its match with rock mass[J]. , 2023, 42(1): 144-153.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1252 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I1/144

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