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THEORETICAL ISSUES OF GEOMECHANICS
ArticleName System approach to selection of rockfall engineering protection steelworks in open pit mines
DOI 10.17580/gzh.2020.01.06
ArticleAuthor Barinov A. Yu., Eremenko V. A., Bushkov V. K.
ArticleAuthorData

Geobrugg, Moscow, Russia:

A. Yu. Barinov, CEO, Candidate of Geographical Sciences

 

College of Mining, NUST MISIS, Moscow, Russia:
V. A. Eremenko, Director of Research Center for Applied Geomechanics and Convergent Technologies in Mining, Professor, Doctor of Engineering Sciences, prof.eremenko@gmail.com

 

Polyus Project, Krasnoyarsk, Russia:
V. K. Bushkov, Head of Laboratory, Candidate of Engineering Sciences

Abstract

An open pit mine project is to ensure elimination of rock falls hazardous for personnel and infrastructure. At the project stage, angles of slopes and dimensions of berms are designed so that to secure transportation routes and working zone in an open pit. On the other hand, in the course of mining, unwanted local gravitational processes can take place (e.g., landslides, rock falls, rock slides, erosion), which are impossible to calculate at the design stage. As a consequence, engineering protection is often required to be undertaken. Experts from Geobrugg and Research Center for Applied Geomechanics and Convergent Technologies in Mining at the NUST MISIS’ College of Mining have jointly performed the review and typification of the modern protection engineering structures based on nailing and high-strength steel mesh reinforcement, as well as developed the block flow charts for mining engineers for rational design of engineering protection using high-tension steel wire meshes. This article offers a brief description of the structures, general guides and selection procedures. The work on typification and decision-making depending on the man-made impact at a specific site were divided into two major stages: the problem analysis/data mining and the reinforcement design. It is worthy of mentioning that the selected design may not embrace all engineering and organizational aspects (pit wall life span, the ‘need-to-reinforce’ factor of a specific site, etc.), which may influence the reinforcement decision-making. Therefore, it s required to undertake an additional analysis of the expedience of a selected reinforcement technique for each site in order to scrutinize activities which are beyond the scope of this study. The modern geotechnical systems suggest a wide range of technologies to protect open pit mines from rock falls and landslides. Many designers provide both off-the-shelf, tested and internationallevel certified structures, and free access to specialized programs for calculation of the parameters and selection of a desired specification out of the existing range. Mine engineers can use the diagram presented in this article for an optimized design depending on the problem being solved, calculate the wanted parameters and address manufactures to get a detail specification for the structure assembly. In this case, the problem of safe and failure-free mining is greatly simplified owing to efficient application of engineering reinforcement systems.

keywords Open pit mine, engineering protection, rock falls, rock slides, slope stabilization system, nail+mesh, anti-rockslide barrier, attenuator, drape, curtain
References

1. Rybin V. V., Zhuravleva O. G., Kaluyzhny A. S., Potapov D. A. Software system design for open pit slope stability estimation with regard to gravity-tectonic stress field. GIAB. 2015. Special issue 56. Deep Open Pit Mines. pp. 150–156.
2. Kozyrev A. A., Rybin V. V., Konstantinov K. N. Assessment of geomechanical state of the edge of rocks in the board career complex instrumental methods. GIAB. 2012. No. 10. pp. 113–119.
3. Kozyrev A. A., Semenova I. E., Rybin V. V., Avetisyan I. M. Stress redistribution in deep open pit mine Zhelezny at Kovdor iron ore deposit. Journal of Mining Science. 2015. Vol. 51, Iss. 4. pp. 659–665.
4. Kozyrev A. A., Rybin V. V. Geomechanical validation of rational designs of pit walls in rock mass under high tectonic stresses. Fundamentalnye i prikladnye voprosy gornykh nauk. 2015. Vol. 2, No. 2. pp. 245–250.
5. Louchnikov V. N., Eremenko V. A., Sandy M. P., Kosyreva M. A. Support Design for Mines Exposed to Rockburst Hazard. Journal of Mining Science. 2017. Vol. 53, Iss. 3. pp. 504–512.
6. Bucher R., Cala M., Zimmermann A., Balg C., Roth A. Large scale field tests of high‐tensile steel wire mesh in combination with dynamic rock bolts subjected to rock burst loading. Ground Support 2013 : Proceedings of the Seventh International Symposium on Ground Support in Mining and Underground Construction. Perth : Australian Centre for Geomechanics, 2013. pp. 221–232.
7. Louchnikov V. N., Eremenko V. A., Sandy M. P. Ground support liners for underground mines: energy absorption capacities and costs. Eurasian Mining. 2014. No. 1. pp. 54–62.
8. Fischer G. Aplicación de Recubrimiento Flexible en Excavaciones en Minería a Cielo Abierto y Subterráneas. 2do Congreso Internacional de Minería y Geología. Panamá, 2016.
9. Player J. R., Villaescusa E., Thompson A. G. Dynamic testing of rock reinforcement using the momentum transfer concept. Ground Support in Mining and Underground Construction : Proceedings of the 4th International Symposium on Ground Support. Leiden : A. A. Balkema Publishers, 2004. pp. 601–629.
10. Player J., Morton E., Thompson A., Villaescusa E. Static and dynamic testing of steel wire mesh for mining applications of rock surface support. Ground Support in Mining and Civil Engineering Construction : Proceedings of the 6th International Symposium on Ground Support. Cape Town, 2008. pp. 693–706.
11. Codelco : Annual report 2015. Codelco, 2015. Available at: https://www.codelco.com/memoria2015/pdf/memoria-anual/en/codelco-annual-report-2015.pdf (accessed: 15.06.2019).
12. Saner A., Murri R. Testing of the Rockburst Codelco Setup S3-S5 : Report No. Psi-16-1231. Vauffelin/Biel, 2016.

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