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主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
Investigation of fracture properties and microbially induced calcite precipitation (MICP) restoration in coal mining areas within the diverse Terrain of Northern Shaanxi, China
  • 作者

    Ying GaoMohd Ashraf Mohamad IsmailTao LiJingwang YanQiang Sun

  • 单位

    School of Civil Engineering, Universiti Sains MalaysiaCollege of Mining and Mechanical Engineering, Liupanshui Normal UniversityShaanxi Coal Group Shenmu NingTiaoTa Mining Company LimitedSchool of Mining Engineering, China University of Mining and Technology

  • 摘要

    The complex and diverse nature of coal mining sites, including different landforms and working conditions, presents challenges for rehabilitation efforts. To address this, we conducted a comprehensive experimental study focusing on microbially induced calcium carbonate precipitation (MICP) remediation, considering the fracture characteristics of coal mining sites. The MICP-restored samples were subjected to confined/unconfined compressive strength, uniaxial/triaxial permeability, and souring tests to assess their restoration efficacy. The results showed that under similar mining conditions, the average depth of parallel fractures was 0.185 m for loess ridges, 0.16 m for the valley, and 0.146 m for the blown-sand region, while the average depth for boundary fractures was 0.411 m for loess ridges, 0.178 m for the valley, and 0.268 m for the blown-sand region. Notably, parallel fractures showed negligible filling in all landforms, whereas boundary fractures in the blown-sand region were completely filled with wind-deposited sand. The valley landform was filled with alluvium and wind-deposited sand, whereas the loess landform was filled with wind-deposited sand and loess. MICP-restored soil samples in all landforms achieved a strength comparable to remolded fracture-free soil samples. Across all landforms, the maximum permeability coefficient of MICP-restored soil samples closely matched that of remolded fracture-free soil samples. Under similar topographic and rainfall conditions MICP restorations scoured 31.3 g on blown-sand region, 19.3 g on loess ridges, and 17.6 g on valleys. These research findings provide an experimental foundation for MICP repair of coal mining ground fractures.

  • 关键词

    Coal miningGround fracturesMICPWind-deposited sandLoess ridgesValley

  • 基金项目(Foundation)
    This paper was funded by Guizhou Provincial Science and Technology Project,Qiankehejichu-ZK[2022]-YB529. Guizhou Education Department (Youth Science and Technology Top-notch Talent Project) QJJ [2024]345. Guizhou Provincial Science and Technology Project, QKHJC-ZK [2023]-YB by Guizhou Education Department Youth Science and Technology Talents Growth Project, QJHKY[2020]122.
  • DOI
  • 引用格式
    Gao, Y., Mohamad Ismail, M.A., Li, T. et al. Investigation of fracture properties and microbially induced calcite precipitation (MICP) restoration in coal mining areas within the diverse Terrain of Northern Shaanxi, China.Int J Coal Sci Technol 12, 2 (2025).
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主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

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