Strata behavior and control strategy of backfilling collaborate with caving fully-mechanized mining
| Autor: | Yin Wei, Sun Wenjie, Zhou Zheyuan, Bai Xiaomin, Wang Jiaqi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
QE1-996.5
gangue backfill mining transition area Control (management) 0211 other engineering and technologies Geology 02 engineering and technology Environmental Science (miscellaneous) 010502 geochemistry & geophysics 01 natural sciences strong mining pressure Mining engineering control strategy strata behavior General Earth and Planetary Sciences caving fully-mechanized mining 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Open Geosciences, Vol 12, Iss 1, Pp 703-717 (2020) |
| ISSN: | 2391-5447 |
| Popis: | This article analyzes the technical difficulties in full-section backfill mining and briefly introduces the technical principle and advantages of backfilling combined with caving fully mechanized mining (BCCFM). To reveal the strata behavior law of the BCCFM workface, this work establishes a three-dimensional numerical model and designs a simulation method by dynamically updating the modulus parameter of the filling body. By the analysis of numerical simulation, the following conclusions about strata behavior of the BCCFM workface were drawn. (1) The strata behavior of the BCCFM workface shows significant nonsymmetrical characteristics, and the pressure in the caving section is higher than that in the backfilling section. φ has the greatest influence on the backfilling section and the least influence on the caving section. C has a significant influence on the range of abutment pressure in the backfilling section. (2) There exits the transition area with strong mine pressure of the BCCFM workface. φ and C have significant effect on the degree of pressure concentration but little effect on the influence range of strong mine pressure in the transition area. (3) Under different conditions, the influence range of strong mine pressure is all less than 6 m. This article puts forward a control strategy of mine pressure in the transition area, which is appropriately improving the strength of the transition hydraulic support within the influence range (6 m) in the transition area according to the pressure concentration coefficient. The field measurement value of Ji15-31010 workface was consistent with numerical simulation, which verifies the reliability of control strategy of the BCCFM workface. |
| Databáze: | OpenAIRE |
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