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砂岩/砂浆-薄喷材料组合体断裂特征.

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Title: 砂岩/砂浆-薄喷材料组合体断裂特征.
Alternate Title: Influence of interface roughness on fracture characteristics of sandstone/mortar-thin spray-on liner composites.
Authors: 韩勇1 hanyong930306@163.com, 袁超1 chao.yuan@sdu.edu.cn, 李树忱1, 王啸天1, 冯现大1
Source: Coal Science & Technology (0253-2336). May2026, Vol. 54 Issue 5, p298-313. 16p.
Subject Terms: *Interfacial roughness, *Fracture mechanics, *Composite materials, *Mining engineering, *Mortar, *Sandstone, *Crack propagation
Abstract (English): Thin spray-on liners (TSLs) are increasingly used in mining as a quick and effective method for sealing and stabilizing rock masses. Bond failure at the rock-TSL interface directly compromises the efficacy of the support system. To investigate the influence of interface roughness on the fracture characteristics of rock-TSL composites, red sandstone and mortar were selected as substrates, and cement-based TSL material was used to fabricate rock/mortar-TSL composite specimens. The fracture performance of these specimens under three-point bending was then examined. Combined with DIC technology, the evolution characteristics of strain and local displacement during the interface fracture process were analyzed. PFC3D software was employed to analyze the crack propagation characteristics of composite specimens with different interface roughness. The results indicated that as interface roughness increases, the peak load, flexural strength, and fracture energy of the sandstone/mortar-TSL composite specimens all increase. When the interface roughness is the same, the bending resistance of the sandstone-TSL composite specimens is higher than that of the mortar-TSL composite specimens. When the roughness was 1.648 m−¹, the flexural strength of the rock/mortar-TSL composite specimens reached its maximum, with values of 5.997 MPa and 3.302 MPa, respectively. The failure of the sandstone-TSL composite specimens include adhesive failure at the interface between the TSL and the rock, as well as tensile fracture of the TSL. The failure of the mortar-TSL composite specimens is primarily interfacial fracture, with local tensile fracture of the TSL and surface spalling of the mortar. The strain map and displacement field obtained by DIC show that as the interface roughness increases, the maximum principal strain at the crack tip increases, and localized tensile displacement in the x-direction also increases. The PFC3D simulation results show that with increasing interface roughness, the composite specimen exhibits a higher crack initiation load, an increased maximum contact force at peak load, and improved fatigue performance. For the same specimen, as the crack propagates, the maximum contact force at the interface increases before the peak and decreases after the peak. The results provide a scientific basis for evaluating the interfacial mechanical behavior of TSLs and the construction at over-excavated areas in mining engineering. [ABSTRACT FROM AUTHOR]
Abstract (Chinese): 薄喷支护在矿山工程开采中被广泛应用, 其作为岩体快速封闭支护技术, 薄喷层与岩石界面黏结失效将直接影响支护效果。为了阐明界面粗糙度对岩石与薄喷材料组合体断裂特征的影响机制, 选取红砂岩、砂浆为基底, 采用水泥基薄喷材料, 制作砂岩/砂浆−薄喷材料组合试样, 研究三点弯曲条件下界面粗糙度对组合试样断裂性能的影响, 并结合数字散斑 (DIC) 技术, 分析界面断裂过程中应变和局部位移演化特征; 采用颗粒流 PFC3D软件研究不同界面粗糙度组合试样的裂纹扩展特征。结果表明: 随着界面粗糙度的增加, 砂岩/砂浆−薄喷材料组合试样的峰值载荷、抗折强度和断裂能均增加。界面粗糙度相同时, 砂岩−薄喷材料组合试样的抗折强度高于砂浆−薄喷材料组合试样。当粗糙度为 1.648 m−1时, 岩石/砂浆−薄喷材料组合试样的抗折强度最大, 分别为 5.997 和 3.302 MPa。砂岩−薄喷材料组合试样的破坏包括薄喷材料与岩石界面黏结失效和薄喷材料的拉伸断裂, 砂浆−薄喷材料组合试样的破坏主要为界面断裂, 局部有薄喷材料拉伸断裂和砂浆表层剥落。DIC 应变图和位移场显示, 随着界面粗糙度增加, 峰值点裂缝尖端最大主应变增加, x 方向局部拉伸位移增加。PFC3D模拟表明, 随着界面粗糙度增加, 组合试样起裂点荷载提高, 峰值荷载时的最大接触力增加。对于同一试样, 随着裂纹扩展, 界面处的最大接触力在峰值前增加, 峰值后减小。研究结果为矿山工程中薄喷支护界面力学性能评估及超挖部位施工提供了科学依据。 [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: 砂岩/砂浆-薄喷材料组合体断裂特征.
– Name: TitleAlt
  Label: Alternate Title
  Group: TiAlt
  Data: Influence of interface roughness on fracture characteristics of sandstone/mortar-thin spray-on liner composites.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22韩勇%22">韩勇</searchLink><relatesTo>1</relatesTo><i> hanyong930306@163.com</i><br /><searchLink fieldCode="AR" term="%22袁超%22">袁超</searchLink><relatesTo>1</relatesTo><i> chao.yuan@sdu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22李树忱%22">李树忱</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22王啸天%22">王啸天</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22冯现大%22">冯现大</searchLink><relatesTo>1</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Coal+Science+%26+Technology+%280253-2336%29%22">Coal Science & Technology (0253-2336)</searchLink>. May2026, Vol. 54 Issue 5, p298-313. 16p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Interfacial+roughness%22">Interfacial roughness</searchLink><br />*<searchLink fieldCode="DE" term="%22Fracture+mechanics%22">Fracture mechanics</searchLink><br />*<searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br />*<searchLink fieldCode="DE" term="%22Mining+engineering%22">Mining engineering</searchLink><br />*<searchLink fieldCode="DE" term="%22Mortar%22">Mortar</searchLink><br />*<searchLink fieldCode="DE" term="%22Sandstone%22">Sandstone</searchLink><br />*<searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: Thin spray-on liners (TSLs) are increasingly used in mining as a quick and effective method for sealing and stabilizing rock masses. Bond failure at the rock-TSL interface directly compromises the efficacy of the support system. To investigate the influence of interface roughness on the fracture characteristics of rock-TSL composites, red sandstone and mortar were selected as substrates, and cement-based TSL material was used to fabricate rock/mortar-TSL composite specimens. The fracture performance of these specimens under three-point bending was then examined. Combined with DIC technology, the evolution characteristics of strain and local displacement during the interface fracture process were analyzed. PFC3D software was employed to analyze the crack propagation characteristics of composite specimens with different interface roughness. The results indicated that as interface roughness increases, the peak load, flexural strength, and fracture energy of the sandstone/mortar-TSL composite specimens all increase. When the interface roughness is the same, the bending resistance of the sandstone-TSL composite specimens is higher than that of the mortar-TSL composite specimens. When the roughness was 1.648 m−¹, the flexural strength of the rock/mortar-TSL composite specimens reached its maximum, with values of 5.997 MPa and 3.302 MPa, respectively. The failure of the sandstone-TSL composite specimens include adhesive failure at the interface between the TSL and the rock, as well as tensile fracture of the TSL. The failure of the mortar-TSL composite specimens is primarily interfacial fracture, with local tensile fracture of the TSL and surface spalling of the mortar. The strain map and displacement field obtained by DIC show that as the interface roughness increases, the maximum principal strain at the crack tip increases, and localized tensile displacement in the x-direction also increases. The PFC3D simulation results show that with increasing interface roughness, the composite specimen exhibits a higher crack initiation load, an increased maximum contact force at peak load, and improved fatigue performance. For the same specimen, as the crack propagates, the maximum contact force at the interface increases before the peak and decreases after the peak. The results provide a scientific basis for evaluating the interfacial mechanical behavior of TSLs and the construction at over-excavated areas in mining engineering. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Chinese)
  Group: Ab
  Data: 薄喷支护在矿山工程开采中被广泛应用, 其作为岩体快速封闭支护技术, 薄喷层与岩石界面黏结失效将直接影响支护效果。为了阐明界面粗糙度对岩石与薄喷材料组合体断裂特征的影响机制, 选取红砂岩、砂浆为基底, 采用水泥基薄喷材料, 制作砂岩/砂浆−薄喷材料组合试样, 研究三点弯曲条件下界面粗糙度对组合试样断裂性能的影响, 并结合数字散斑 (DIC) 技术, 分析界面断裂过程中应变和局部位移演化特征; 采用颗粒流 PFC3D软件研究不同界面粗糙度组合试样的裂纹扩展特征。结果表明: 随着界面粗糙度的增加, 砂岩/砂浆−薄喷材料组合试样的峰值载荷、抗折强度和断裂能均增加。界面粗糙度相同时, 砂岩−薄喷材料组合试样的抗折强度高于砂浆−薄喷材料组合试样。当粗糙度为 1.648 m−1时, 岩石/砂浆−薄喷材料组合试样的抗折强度最大, 分别为 5.997 和 3.302 MPa。砂岩−薄喷材料组合试样的破坏包括薄喷材料与岩石界面黏结失效和薄喷材料的拉伸断裂, 砂浆−薄喷材料组合试样的破坏主要为界面断裂, 局部有薄喷材料拉伸断裂和砂浆表层剥落。DIC 应变图和位移场显示, 随着界面粗糙度增加, 峰值点裂缝尖端最大主应变增加, x 方向局部拉伸位移增加。PFC3D模拟表明, 随着界面粗糙度增加, 组合试样起裂点荷载提高, 峰值荷载时的最大接触力增加。对于同一试样, 随着裂纹扩展, 界面处的最大接触力在峰值前增加, 峰值后减小。研究结果为矿山工程中薄喷支护界面力学性能评估及超挖部位施工提供了科学依据。 [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.12438/cst.2025-0628
    Languages:
      – Code: chi
        Text: Chinese
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 298
    Subjects:
      – SubjectFull: Interfacial roughness
        Type: general
      – SubjectFull: Fracture mechanics
        Type: general
      – SubjectFull: Composite materials
        Type: general
      – SubjectFull: Mining engineering
        Type: general
      – SubjectFull: Mortar
        Type: general
      – SubjectFull: Sandstone
        Type: general
      – SubjectFull: Crack propagation
        Type: general
    Titles:
      – TitleFull: 砂岩/砂浆-薄喷材料组合体断裂特征.
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: 韩勇
      – PersonEntity:
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            NameFull: 袁超
      – PersonEntity:
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            NameFull: 李树忱
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            NameFull: 王啸天
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            NameFull: 冯现大
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
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              Value: 02532336
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              Value: 54
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              Value: 5
          Titles:
            – TitleFull: Coal Science & Technology (0253-2336)
              Type: main
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