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石墨尾矿充填废弃矿井老空区相似模拟实验研究

李家乐 孟上九 王炯辉 王淼 秦艺峰

黑龙江科技大学学报2025,Vol.35Issue(5):717-723,7.
黑龙江科技大学学报2025,Vol.35Issue(5):717-723,7.DOI:10.3969/j.issn.2095-7262.2025.05.005

石墨尾矿充填废弃矿井老空区相似模拟实验研究

Study on simulant experiment of graphite tailings backfilling in abandoned mine goafs

李家乐 1孟上九 2王炯辉 3王淼 4秦艺峰5

作者信息

  • 1. 黑龙江科技大学 建筑工程学院,哈尔滨 150022
  • 2. 黑龙江科技大学 建筑工程学院,哈尔滨 150022||黑龙江科技大学 中俄智慧矿山联合实验室,哈尔滨 150022
  • 3. 中国五矿集团有限公司,北京 100010
  • 4. 黑龙江省水利科学研究院,哈尔滨 150080
  • 5. 黑龙江科技大学 中俄智慧矿山联合实验室,哈尔滨 150022
  • 折叠

摘要

Abstract

This paper is an effort to reveal the influence of ultrafine particle content on the particle size distribution,dewatering behavior and consolidation characteristics of the filling body.The study in-volves designing a laboratory-scale water-sand filling simulation device based on similarity theory;and in-vestigating the effects of different ultrafine particle content on the permeability-dewatering performance and the settlement-consolidation behavior of the graphite tailings during goafs backfilling.The results show that the higher ultra-fine particle content leads to the lower dewatering efficiency and lower mass concentration after filling,and along with the increase of the ultrafine content comes a 35.13%decrease of the dewatering rate from 5.01 mL/s to 3.25 mL/s.The fine particles is apt to accumulate in the upper layer of the backfill caused by its slower sedimentation velocity,contributing to uneven internal distribu-tion with 69.47%of particles smaller than 37 μm in the top layer.The increase of fine particle content enhances the packing effect with a denser structure of the backfill,the reduced consolidation compressi-bility and the shrinkage deformation.When the fine content reaches 24%gradually,the compression co-efficient of the filling body under 1 MPa consolidation stress decreases by 53.33%,50%and 57.14%from the upper to the lower layer,respectively.

关键词

水砂充填/极细颗粒/渗透脱水/沉降规律/固结压缩

Key words

hydraulic sand backfill/ultra-fine particles/permeability dewatering/settlement behav-ior/consolidation compressibility

分类

建筑与水利

引用本文复制引用

李家乐,孟上九,王炯辉,王淼,秦艺峰..石墨尾矿充填废弃矿井老空区相似模拟实验研究[J].黑龙江科技大学学报,2025,35(5):717-723,7.

基金项目

黑龙江省自然科学基金项目(ZD2023E008) (ZD2023E008)

黑龙江省"双一流"新一轮建设学科协同创新成果建设项目(702000009020503) (702000009020503)

黑龙江科技大学学报

2095-7262

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