A numerical modeling approach for evaluation of spalling associated face instability in longwall workings under massive sandstone roof
Engineering Failure Analysis(2020)
Abstract
•The mechanism of face instability and associated spalling was studied.•The critical strain limit of face instability was proposed.•A design criteria was proposed for three-dimensional quantification of face spalling.•Pertinent rock mechanics indicators of face spalling were comprehensively discussed.
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Key words
Face instability,Stress redistribution,Strain distribution,Face spalling,Longwall mining
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