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A Continuous Conversion Technology from Top Coal Caving into Multi-Slice Mining for Thick Bifurcated Coal Seams
- Source :
- Geotechnical and Geological Engineering. 39:5983-5992
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- This paper presents a mining technology that enables the continuous conversion from top coal caving (TCC) to multi-slice mining (MSM). The technology helps operations overcome challenges with mining thick bifurcated coal seams, particularly the challenge of rock-parting seams affecting the caving of TCC mining methods. Findings show that the relationship between the rock-parting thickness and the caveability of top coal can be divided into 3 phases, including a complete caving phase, a transition phase, and a stable phase. This continuous conversion technology was applied in the Zhongwei Coal Mine in which TCC was used to extract the initial 260 m of the study area where the rock-parting seam was relatively thin before a transition to MSM was made due to the rock-parting seam becoming significantly thicker. The continuous conversion to MSM involved the working face advancing upward at an angle of 10° until the rock-parting seam could serve as the immediate floor for the upper slice of the coal seam. The rock-parting seam floor also acted as the immediate roof for the working face of the subsequently mined lower slice. The application of this continuous conversion mining technology obtained good application results.
- Subjects :
- business.industry
ComputingMilieux_PERSONALCOMPUTING
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Coal mining
Soil Science
Geology
Multi slice
Geotechnical Engineering and Engineering Geology
GeneralLiterature_MISCELLANEOUS
Mining engineering
Architecture
Stable phase
Coal
business
Roof
ComputingMethodologies_COMPUTERGRAPHICS
Subjects
Details
- ISSN :
- 15731529 and 09603182
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Geotechnical and Geological Engineering
- Accession number :
- edsair.doi...........161d795c8dded76588ac9b5ea7b96c52