Journal
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
Volume 27, Issue 2, Pages 293-297Publisher
ELSEVIER
DOI: 10.1016/j.ijmst.2017.01.017
Keywords
Numerical simulation; Shield resistance; Interaction between shield and surrounding rock; Mining heights
Categories
Funding
- National Natural Science Foundation of China [U1261207, 51274086]
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A numerical model based on a Continuum-based Distinct Element Method (CDEM) was used to carry out a dynamic simulation of the interaction between shield and rock strata movement in longwall mining. In Northern China, the Ordos coal field geological conditions and operational characteristics were used as a case example. The CDEM was constructed on Ordos coal field shield's operation characteristics and geological conditions. Numerical modelling was carried out to investigate the effects of different mining heights on the caving process, movement characteristics, equilibrium and stability conditions of overburden as the interaction between shield and surrounding rocks. With the numerical model, the internal factors for changes in shield resistance under different mining heights was found. The quantitative relationship between mining heights and shield resistance was also obtained by the numerical simulation. (C) 2017 Published by Elsevier B.V. on behalf of China University of Mining & Technology.
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