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<p>Rock anchors are the cornerstones of modern geotechnical engineering. Adequate dimensioning will both reduce cost and improve safety. We here present microseismic monitoring results of rock anchor uplift tests at full scale. The uplift tests were monitored with a network of surface geophones, amongst other sensor systems. These geophones recorded the failure of the rock mass during uplift. Our results show that this approach gives valuable insight into the fracture evolution in time and space. A main fracture cone develops at a <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="603_2025_4515_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">\(23^{\circ }\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>23</mn> <mo>∘</mo> </msup> </math></EquationSource> </InlineEquation> angle, and a secondary fracture cone at a <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="603_2025_4515_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="25" /> </InlineMediaObject> <EquationSource Format="TEX">\(35^{\circ }\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>35</mn> <mo>∘</mo> </msup> </math></EquationSource> </InlineEquation>.</p>

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Microseismic Monitoring of the Rock Mass During Full-Scale Uplift Tests of Rock Anchors

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月3日

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  • Nadège Langet,
  • Andreas Wuestefeld,
  • Bjarte Grindheim,
  • Charlie C. Li

摘要

Rock anchors are the cornerstones of modern geotechnical engineering. Adequate dimensioning will both reduce cost and improve safety. We here present microseismic monitoring results of rock anchor uplift tests at full scale. The uplift tests were monitored with a network of surface geophones, amongst other sensor systems. These geophones recorded the failure of the rock mass during uplift. Our results show that this approach gives valuable insight into the fracture evolution in time and space. A main fracture cone develops at a \(23^{\circ }\) 23 ∘ angle, and a secondary fracture cone at a \(35^{\circ }\) 35 ∘ .