黄土-粉煤灰基新型充填材料性能研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (1): 199-208.

所属专题：资源综合利用

黄土-粉煤灰基新型充填材料性能研究

赵兵朝^1,2, 王海龙¹, 翟迪¹, 马云祥¹, 韦启蒙¹, 王京滨¹

1.西安科技大学能源学院,西安 710054;
2.西安科技大学西部矿井开采及灾害防治教育部重点实验室,西安 710054

收稿日期:2021-08-17 修订日期:2021-11-22 出版日期:2022-01-15 发布日期:2022-02-10
通信作者: 王海龙,硕士研究生。E-mail:Wanghl128821@163.com
作者简介:赵兵朝(1978—),男,博士,教授。主要从事采动损害与环境保护等方面的教学与科研工作。E-mail:Zhaobc913@163.com
基金资助:
国家自然科学基金(52074208,51874230)

Performance of a New Type of Backfilling Material Based on Loess-Fly Ash

ZHAO Bingchao^1,2, WANG Hailong¹, ZHAI Di¹, MA Yunxiang¹, WEI Qimeng¹, WANG Jingbin¹

1. College of Energy Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;
2. Key Laboratory ofWestern Mine Exploration and Hazard Prevention, Ministry of Education, Xi'an University of Science and Technology, Xi'an 710054, China

Received:2021-08-17 Revised:2021-11-22 Online:2022-01-15 Published:2022-02-10

摘要/Abstract

摘要： 充填开采是实现矿山安全绿色开采的重要途径,要求充填材料来源广泛,成本低,且必须能满足充填工艺需求。为探究黄土含量对膏体充填材料流动性和力学性能的影响规律,通过室内试验测定了不同类型粉煤灰、不同黄土含量条件下膏体充填材料的屈服应力和抗压强度等参数。研究结果表明:用黄土替代粉煤灰制作充填体,取材方便,成本低,且黄土颗粒能很好地包裹大颗粒,减少颗粒输送中对管道内壁的磨损,提升料浆流动性;随着黄土含量增加,充填体抗压强度会逐渐增大,但当黄土含量超过12.5%(质量分数)后,黄土细颗粒会阻碍水泥和其他物料之间的黏结,导致抗压强度有所降低;黄土与粉煤灰质量比为2∶8、3∶7,养护期为28 d时,充填材料既符合充填工艺要求,又能最大程度降低充填成本。

关键词: 黄土, 粉煤灰, 膏体充填材料, 颗粒级配, 流动性, 力学性能

Abstract: Backfilling mining is an important way to achieve safe and green mining in mines. It requires a wide origin of source of backfilling materials, low cost, and must meet the requirements of the backfilling process. In order to explore the influence of loess content on the fluidity and mechanical properties of paste backfilling materials, the parameters of yield stress and compressive strength of paste backfilling materials under different types of fly ash and different loess content were determined through laboratory experiments. The results show that the backfilling body made of loess instead of fly ash is convenient and low cost, and large particles are well wrapped in loess particle, which reduces the wear on the inner wall of pipeline during particle transportation and improves the fluidity of the slurry. With the increase of loess content, the compressive strength of backfilling body gradually increases, but when the mass fraction of loess exceeds 12.5%, the loess fine particle hinders the bonding between cement and other materials, resulting in a decrease in compressive strength. When the mass ratio of loess to fly ash is 2∶8, 3∶7, and the curing period is 28 d, the backfilling material not only meets the requirements of backfilling process, but also reduces the backfilling cost to the maximum extent.

Key words: loess, fly ash, paste backfilling material, particle gradation, fluidity, mechanical property

中图分类号:

TB302.4

赵兵朝, 王海龙, 翟迪, 马云祥, 韦启蒙, 王京滨. 黄土-粉煤灰基新型充填材料性能研究[J]. 硅酸盐通报, 2022, 41(1): 199-208.

ZHAO Bingchao, WANG Hailong, ZHAI Di, MA Yunxiang, WEI Qimeng, WANG Jingbin. Performance of a New Type of Backfilling Material Based on Loess-Fly Ash[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(1): 199-208.

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黄土-粉煤灰基新型充填材料性能研究

Performance of a New Type of Backfilling Material Based on Loess-Fly Ash

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