Numerical simulation of roof cavings in several Kuzbass mines using finite-difference continuum damage mechanics approach
| Autor: | Gabriel S. Esterhuizen, M. O. Eremin, Igor Yu. Smolin |
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| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
0211 other engineering and technologies Energy Engineering and Power Technology Numerical simulation 02 engineering and technology Article Rock mass 020401 chemical engineering Mining engineering Geochemistry and Petrology Coal Extraction (military) 0204 chemical engineering Rock mass classification Roof lcsh:Mining engineering. Metallurgy 021101 geological & geomatics engineering Computer simulation business.industry Coal mining Finite difference Abutment pressure Longwall mining Geotechnical Engineering and Engineering Geology Underground openings Roof caving business Geology |
| Zdroj: | International journal of mining science and technology International Journal of Mining Science and Technology, Vol 30, Iss 2, Pp 157-166 (2020) |
| ISSN: | 2095-2686 |
| Popis: | An essential stage of mine design is an estimation of the steps of the first and periodic roof caving in longwall mines. Generally, this is carried out using the field experience and can be much enhanced by numerical simulation. In this work, the finite-difference method was applied coupled with the continuum damage mechanics (CDM) approach to simulate the stress-strain evolution of the rock mass with the underground opening during coal extraction. The steps and stages of roof caving were estimated relying on the numerical simulation data, and they were compared with the field data from several operating mines in the south of the Kuznetsk Basin, Russia. The dependence of the first roof caving step in simulation linearly correlates with field data. The results correspond to the actual roofs of longwall panels of the flat-dipping coal seams and the average rate of face advancement is approximately 5 m/day. Keywords: Longwall mining, Rock mass, Underground openings, Roof caving, Abutment pressure, Numerical simulation |
| Databáze: | OpenAIRE |
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