Dynamic Characteristics of Rock and Coal during Deep Upper Protective Mining with Short Distance

Abstract:

The studying of the nonlinear dynamical of rock mass has directly effect on the forecast and the prevention of the disasters in coal mining. However, there have very few tests of the large-scale simulation experiments of dynamic characteristics of rock mass in deep mining. This article focuses on the protective seam in Ji14-31010 of Tian’an Twelvth Mine with the experimental prototype. The simulation model test is carried out to study the mining pressure in Ji14. The displacement and stress of the Ji14 is obtained in the excavation process. The displacement and the stress change law of the underlying coal and rock mass are analyzed from the test data. The analysis results give some suggestions to the project design.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 2432-2435
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.2432
• Online since: September 2013
• Authors: Gong Ling Hui, Jin Hu Song
• Keywords: Close Distance, Deep Mining, Dynamical Evolution, Low Height, Model Test

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