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The Research on the Parameters of Blasting the Top-coal of Longwall Caving Technique in the Hard Thick Coal Seam

Jia Wang

Open publisher page 1 citations

Abstract

The blasting technique before the working face of the longwall caving in a hard thick coal seam is systematically studied by employing the blasting experiments,fractal theory,3-DFLAC numerical simulation and the analogy with the other blasting engineering.The feasible blasting project and parameters are proposed in detail.The recovery rate of top-coal is increased by 25.77% when the pre-blasting technique is used.In the same time,the distributions of the particle sizes of the top-coal before and after blasting are analyzed based on the topology.

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What this paper is about

The blasting technique before the working face of the longwall caving in a hard thick coal seam is systematically studied by employing the blasting experiments,fractal theory,3-DFLAC numerical simulation and the analogy with the other blasting engineering.The feasible blasting project and parameters are proposed in detail.The recovery rate of top-coal is increased by 25.77% when the pre-blasting technique is used.In the same time,the distributions of the particle sizes of the top-coal before and after blasting are analyzed based on the topology.

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Available abstract

The blasting technique before the working face of the longwall caving in a hard thick coal seam is systematically studied by employing the blasting experiments,fractal theory,3-DFLAC numerical simulation and the analogy with the other blasting engineering.The feasible blasting project and parameters are proposed in detail.The recovery rate of top-coal is increased by 25.77% when the pre-blasting technique is used.In the same time,the distributions of the particle sizes of the top-coal before and after blasting are analyzed based on the topology.

Key concepts: Rock blasting, Coal, Mining engineering, Fractal, Coal mining, Geology, Geotechnical engineering, Longwall mining

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