A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate
Anchor rock bolts are among the essential support components employed in coal mine support engineering. Measuring the axial load of the supporting anchor bolts constitutes an important foundation for evaluating the support effect and the mechanical state of the surrounding rock. The existing methods...
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MDPI AG
2024-11-01
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| Series: | Mathematics |
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| author | Yongchao Lei Xingliang Xu Suchuan Tian Hao Shi |
| author_facet | Yongchao Lei Xingliang Xu Suchuan Tian Hao Shi |
| author_sort | Yongchao Lei |
| collection | DOAJ |
| description | Anchor rock bolts are among the essential support components employed in coal mine support engineering. Measuring the axial load of the supporting anchor bolts constitutes an important foundation for evaluating the support effect and the mechanical state of the surrounding rock. The existing methods for measuring the axial load of rock bolts have difficulty meeting the actual demands in terms of accuracy and means. Therefore, we propose a novel inverse method for determining the axial load of rock bolts. On the basis of the dynamic relationship between the axial load of the anchor bolt and the strain of the plate, a calculation model for the inverse analysis of the axial load from the plate strain is presented, and it is verified and corrected through finite element analysis and indoor physical experiments. By combining the calculation model with the digital image correlation method, a low costinversion of the axial load of the anchor bolt in actual support engineering is achieved. The experimental results demonstrate that the average errors of the load inversion of anchor bolts in three different states via the theory and method proposed in this paper are less than 8.8% (4 kN), 3.6% (3.2 kN), and 14.7% (5.5 kN), respectively, and the average error of the axial load of the rock bolts in the proposed method is only 4.23 kN. It possesses relatively high accuracy and can be effectively applied in the actual production processes of mines. |
| format | Article |
| id | doaj-art-20091bec49e3445dbfd62eec35942b0c |
| institution | OA Journals |
| issn | 2227-7390 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mathematics |
| spelling | doaj-art-20091bec49e3445dbfd62eec35942b0c2025-08-20T02:04:54ZengMDPI AGMathematics2227-73902024-11-011222348010.3390/math12223480A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing PlateYongchao Lei0Xingliang Xu1Suchuan Tian2Hao Shi3State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaAnchor rock bolts are among the essential support components employed in coal mine support engineering. Measuring the axial load of the supporting anchor bolts constitutes an important foundation for evaluating the support effect and the mechanical state of the surrounding rock. The existing methods for measuring the axial load of rock bolts have difficulty meeting the actual demands in terms of accuracy and means. Therefore, we propose a novel inverse method for determining the axial load of rock bolts. On the basis of the dynamic relationship between the axial load of the anchor bolt and the strain of the plate, a calculation model for the inverse analysis of the axial load from the plate strain is presented, and it is verified and corrected through finite element analysis and indoor physical experiments. By combining the calculation model with the digital image correlation method, a low costinversion of the axial load of the anchor bolt in actual support engineering is achieved. The experimental results demonstrate that the average errors of the load inversion of anchor bolts in three different states via the theory and method proposed in this paper are less than 8.8% (4 kN), 3.6% (3.2 kN), and 14.7% (5.5 kN), respectively, and the average error of the axial load of the rock bolts in the proposed method is only 4.23 kN. It possesses relatively high accuracy and can be effectively applied in the actual production processes of mines.https://www.mdpi.com/2227-7390/12/22/3480rock boltsaxial load inversiondigital image correlationbolt platesupport engineering |
| spellingShingle | Yongchao Lei Xingliang Xu Suchuan Tian Hao Shi A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate Mathematics rock bolts axial load inversion digital image correlation bolt plate support engineering |
| title | A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate |
| title_full | A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate |
| title_fullStr | A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate |
| title_full_unstemmed | A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate |
| title_short | A Novel Axial Load Inversion Method for Rock Bolts Based on the Surface Strain of a Bearing Plate |
| title_sort | novel axial load inversion method for rock bolts based on the surface strain of a bearing plate |
| topic | rock bolts axial load inversion digital image correlation bolt plate support engineering |
| url | https://www.mdpi.com/2227-7390/12/22/3480 |
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