不同粒径煤矸石浆液的流变性能试验

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (12): 4324-4331.

所属专题：资源综合利用

不同粒径煤矸石浆液的流变性能试验

周瑶^1,2, 谢志清¹, 刘长友², 潘海洋¹, 赵明¹

1.中国煤炭地质总局勘查研究总院,北京 100039;
2.中国矿业大学矿业工程学院,徐州 221116

收稿日期:2022-07-26 修订日期:2022-09-05 出版日期:2022-12-15 发布日期:2023-01-11
作者简介:周瑶(1990—),女,博士,工程师。主要从事煤基固废资源化处理及注浆充填材料方面的研究。E-mail:1352148943@qq.com
基金资助:
国家自然科学基金(52074267);中国煤炭地质总局勘查研究总院国有资本金研究课题(ZY-2022-05)

Rheological Properties Test of Coal Gangue Slurry with Different Particle Sizes

ZHOU Yao^1,2, XIE Zhiqing¹, LIU Changyou², PAN Haiyang¹, ZHAO Ming¹

1. General Prospecting Institute of China National Administration of Coal Geology, Beijing 100039, China;
2. School of Mines, China University of Mining and Technology, Xuzhou 221116, China

Received:2022-07-26 Revised:2022-09-05 Online:2022-12-15 Published:2023-01-11

摘要/Abstract

摘要： 煤矸石浆液的流变性能影响注浆的可泵性,可通过调节粒径和水矸比对流变性能进行调控。本文测试了新鲜煤矸石浆液的流变性能、流动度及流动时间,研究了不同粒径(100目、150目、200目、250目、300目,分别对应150 μm、106 μm、74 μm、58 μm和48 μm)及水矸比(1.0、1.5、2.0)对煤矸石浆液流变性能的影响,探讨了流变参数、流动度及流动时间的变化规律,并提出了注浆建议。结果表明:水矸比是煤矸石浆液流变性能的主控因素,煤矸石浆液在水矸比为1.0时,符合Herschel-Bulkley模型,颗粒粒径会影响浆液的屈服应力和塑性黏度,屈服应力为2.5~3.6 Pa;在水矸比为1.5、2.0时,符合Bingham模型,颗粒粒径只影响浆液的屈服应力,屈服应力为0.1~0.7 Pa。不同粒径煤矸石浆液的流动度均不低于365 mm,流动时间在27~31 s。为提高浆液的可泵性,可考虑采用较大的水矸比(≥1.5)和较长的搅拌时间(>800 s)。

关键词: 煤矸石, 粒径, 流变性能, 屈服应力, 流动度, 流动时间

Abstract: The pumpability of coal gangue slurry is affected by its rheological properties, which are regulated by particle size and water/gangue ratio. The rheological properties, degree of fluidity and flow time of fresh coal gangue slurry were tested in this paper, and the effects of different particle sizes (100 mesh, 150 mesh, 200 mesh, 250 mesh, 300 mesh, corresponding to 150 μm, 106 μm, 74 μm, 58 μm and 48 μm, respectively) and water/gangue ratio (1.0, 1.5, 2.0) on the rheological parameters were discussed.The variation rules of rheological parameters, degree of fluidity and flow time were discussed as well, and some grouting suggestions were put forward. The results show that the water/gangue ratio is the main controlling factor of rheological properties of coal gangue slurry. When the water/gangue ratio is 1.0, the coal gangue slurry conforms to the Herschel-Bulkley model, and the particle size affects both the yield stress and plastic viscosity of coal gangue slurry, and the yield stress is between 2.5 Pa and 3.6 Pa. When the water/gangue ratio is 1.5 and 2.0, the coal gangue slurry conforms to the Bingham model, and the particle size only affects the yield stress of coal gangue slurry, and the yield stress is between 0.1 Pa and 0.7 Pa. In addition, the degree of fluidity of coal gangue slurry with different particle sizes is more than 365 mm, and the flow time is in the range of 27 s to 31 s. Based on these test results, grouting suggestions are put forward that a larger water/gangue ratio (≥1.5) and a longer stirring time (>800 s) are recommended to improve the pumpability of coal gangue slurry.

Key words: coal gangue, particle size, rheological property, yield stress, degree of fluidity, flow time

中图分类号:

X752

周瑶, 谢志清, 刘长友, 潘海洋, 赵明. 不同粒径煤矸石浆液的流变性能试验[J]. 硅酸盐通报, 2022, 41(12): 4324-4331.

ZHOU Yao, XIE Zhiqing, LIU Changyou, PAN Haiyang, ZHAO Ming. Rheological Properties Test of Coal Gangue Slurry with Different Particle Sizes[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(12): 4324-4331.

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不同粒径煤矸石浆液的流变性能试验

Rheological Properties Test of Coal Gangue Slurry with Different Particle Sizes

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