| 刘向峰*,郝国亮,李喜林,王来贵.侧限压缩试验下矸石充填材料的变形特性及其颗粒分布研究[J].实验力学,2022,37(3):439~446 |
| 侧限压缩试验下矸石充填材料的变形特性及其颗粒分布研究 |
| Research on deformation characteristics and particle distribution of gangue filling material under confined compression test |
| 投稿时间：2021-04-27 修订日期：2021-08-07 |
| DOI：10.7520/1001-4888-21-103 |
| 中文关键词: 侧限压缩试验 矸石充填材料 变形特性 颗粒分布 分形维数 |
| 英文关键词:confined compression test gangue filling material deformation characteristics particle distribution fractal dimension |
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| 中文摘要: |
| 为研究侧限压缩试验条件下矸石充填材料的变形特性及其颗粒分布关系，以抚顺西露天矿矸石为研究材料，选取矸石颗粒粒径为0~5mm、0~10mm、0~20mm、5~10mm、5~20mm和10~20mm的6组矸石充填材料，采用自制的钢桶，通过侧限压缩试验研究压缩过程中矸石变形特性；对压缩后矸石进行筛分试验，研究其颗粒分布特征；同时，采用分形维数进一步描述破碎矸石的颗粒分布状况。结果表明：不同粒径级矸石充填材料受压过程中，应力应变关系呈现对数分布关系。压缩初期为矸石充填体变形发展阶段，随着载荷的增加，矸石充填材料变形趋于稳定，0~20mm矸石粒径组合应变值最低；连续级配矸石对比非连续级配矸石表现出更稳定的粒径变化特征；在双对数坐标系下，矸石质量与粒径的夹角为8°~12°，矸石受压过程中分形维数变化幅度稳定；0~20mm矸石粒径组合分形维数的极差最小。 |
| 英文摘要: |
| To study the deformation characteristics and particle distribution relationship of the gangue filling material under the condition of confined compression test, the gangue of Fushun West Open-pit Mine was used as the research material, selects 6 groups of gangue filling materials of 0~5mm, 0~10mm, 0~20mm, 5~10mm, 5~20mm and 10~20mm. A self-made steel drum was used to carry out a confined compression test to study the deformation characteristics of the gangue during compression, and a screening test was carried out on the gangue after compression to study its particle distribution characteristics. At the same time, the fractal dimension was used to further describe the particle distribution of the broken gangue. The results show that the stress-strain relationship of the gangue filling materials of different particle sizes is in a logarithmic distribution during the compression process. The initial stage of compression is the development stage of the deformation of the gangue filling body. With the progress of the compression test, the deformation of the gangue filling material tends to be stable, and the combined strain value of the 0~20mm gangue particle size is the lowest; compared with discontinuously graded gangue, the continuous graded gangue exhibits more stable particle size change characteristics. Furthermore, in the double logarithmic coordinate system, the angle between the mass of the gangue and the particle size is 8°~12°, and the fractal dimension of the gangue is stable during the compression process. Moreover, the range of the combined fractal dimension of the particle size of the gangue from 0~20mm is the smallest. |
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