镁-煤基全固废充填材料的强度特性及微结构演化研究

doi:10.11896/cldb.24090189

材料导报

2026, Vol. 40

Issue (2): 24090189-11 https://doi.org/10.11896/cldb.24090189

无机非金属及其复合材料

镁-煤基全固废充填材料的强度特性及微结构演化研究

刘浪^1,2,*, 袁毅^1,2, 王海社⁴, 蔚保宁³, 梁雄⁴, 朱梦博^1,2, 刘彪⁴, 胡涛⁴, 杨潘^1,2

1 西安科技大学能源与矿业工程学院,西安 710054
2 西安科技大学矿山功能性充填技术研究中心,西安 710054
3 西安弗尔绿创矿业科技有限责任公司,西安 710054
4 陕西榆能化学材料有限公司,陕西榆林 719000

Strength Characteristics and Microstructure Evolution of Magnesium-Coal Based All Solid Waste Backfill Materials

LIU Lang^1,2,*, YUAN Yi^1,2, WANG Haishe⁴, WEI Baoning³, LIANG Xiong⁴, ZHU Mengbo^1,2, LIU Biao⁴, HU Tao⁴, YANG Pang^1,2

1 College of Energy and Mining Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2 Mine Functional Backfill Technology Research Center, Xi’an University of Science and Technology, Xi’an 710054, China
3 Xi’an Fur Lvchuang Mining Technology Co, Xi’an 710054, China
4 Shaanxi Yuneng Chemical Materials Co, Yulin 719000, Shaanxi China

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摘要随着煤矿资源开采及深加工,大量的固体废弃物堆存于地表。为了实现矿山绿色开采,推动大宗固废处置利用,采用改性镁渣(MMS)、煤气化渣(CGS)、煤矸石(CG)和脱硫石膏(FDG)四种固体废弃物制备镁-煤基全固废充填材料(M-CSWBM)。分析了M-CSWBM的物相组成、微观样貌及元素分布、力学性能等,揭示不同种类和不同掺量固废对充填体微观结构和宏观力学发展的影响。研究表明:MMS、CGS、FDG质量分数分别为20%、40%、5%时,试件抗压强度最高,养护3 d、28 d、56 d强度分别为0.26 MPa、9.55 MPa和12.16 MPa;CGS和MMS掺入,会使体系中水化产物明显增加,大孔向小孔转变且最可几孔径逐渐变小,强度呈正增长趋势;FDG掺量对M-CSWBM体系力学性能呈现显著阈值效应。当FDG掺量增至7.5%时,其通过激发二次水化反应显著优化孔隙结构(最可几孔径降低48%),促使28 d抗压强度达5.65 MPa,较基准组(0.76 MPa)提升641%;而掺量超过临界阈值(7.5%)后,未反应的FDG颗粒导致孔隙粗化(最可几孔径回升21%),致使10%掺量试件强度衰减至5.09 MPa,较最优掺量组下降10%。基于上述结果,通过建立水化产物、孔隙结构与抗压强度之间的相关性,揭示了固废掺量通过影响水化产物、孔隙结构,进而对抗压强度发展规律产生影响。研究成果为大宗全固废充填材料的利用提供数据支撑和理论参考。

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	刘浪
	袁毅
	王海社
	蔚保宁
	梁雄
	朱梦博
	刘彪
	胡涛
	杨潘

关键词: 改性镁渣煤气化渣胶凝材料全固废充填材料

Abstract: With the mining and deep processing of coal resources, a large amount of solid waste is deposited on the surface. In order to achieve green mining and promote the disposal and utilization of bulk solid waste, modified magnesium slag (MMS), coal gasification slag (CGS), coal gangue (CG), and desulfurization gypsum (FDG) were used to prepare magnesium-coal based solid waste backfill material (M-CSWBM). Uniaxial compression testing, X-ray polycrystalline diffraction(XRD), thermogravimetric analysis(TG), scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), and mercury intrusion porosimetry testing methods(MIP) were used to reveal the effects of different types and amounts of doped solid wastes on the microstructure and macroeconomics development of the filled body. The experimental results demonstrated that the specimens attained optimal compressive strength when the constituent proportions of MMS, CGS, and FDG were maintained at 20%, 40%, and 5% respectively. The corresponding compressive strengths measured 0.26 MPa, 9.55 MPa, and 12.16 MPa following curing periods of 3 d, 28 d, and 56 d; CGS and MMS incorporation, will make the hydration products in the system increased significantly, the transformation of large pores to small pores and the most available pore size gradually become smaller, the strength of the positive growth trend; appropriate amount of FDG incorporation to promote the hydration reaction, the system connected to the voids to be refined, the strength of the growth of the role of a significant contribution to the growth of the. FDG addition from 0% to 7.5% increased the compressive strength of M-CSWBM specimens at 28 d from 0.76 MPa to 5.65 MPa, an enhancement of 641%, but excessive addition resulted in an increase in both internal porosity, and most available pore size, which inhibited the strength increase. A 10% decrease in strength was observed for the 10% FDG doped specimens at 28 d compared to the 7.5% doped. Based on the above results, by establishing the correlation between hydration products, pore structure and compressive strength, it reveals that the solid waste dosing affects the development law of compressive strength by influencing the hydration pro-ducts, pore structure and then the compressive strength. The research results provide data support and theoretical reference for the utilization of bulk all-solid waste backfill materials.

Key words: modified magnesium slag coal gasification slag cementitious materials total solid waste backfill material

出版日期: 2026-01-25 发布日期: 2026-01-27

ZTFLH:

TD801

基金资助: 国家自然科学基金(52222404;52074212;51874229);陕西省重点研发计划(2023-LL-QY-07)

通讯作者: *刘浪,西安科技大学能源与矿业工程学院教授、博士研究生导师。主要从事矿山功能性充填方面的教学与科研工作。liulang@xust.edu.cn

引用本文:

刘浪, 袁毅, 王海社, 蔚保宁, 梁雄, 朱梦博, 刘彪, 胡涛, 杨潘. 镁-煤基全固废充填材料的强度特性及微结构演化研究[J]. 材料导报, 2026, 40(2): 24090189-11.
LIU Lang, YUAN Yi, WANG Haishe, WEI Baoning, LIANG Xiong, ZHU Mengbo, LIU Biao, HU Tao, YANG Pang. Strength Characteristics and Microstructure Evolution of Magnesium-Coal Based All Solid Waste Backfill Materials. Materials Reports, 2026, 40(2): 24090189-11.

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https://www.mater-rep.com/CN/10.11896/cldb.24090189 或 https://www.mater-rep.com/CN/Y2026/V40/I2/24090189

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