Article ID Journal Published Year Pages File Type
809004 International Journal of Rock Mechanics and Mining Sciences 2016 9 Pages PDF
Abstract

•A new excavability classification system is suggested for coals.•A new evaluation method of Schmidt Hammer tests suggested for cleat existence.•The highest 3 Schmidt Hammer readings are the best suited for strength evaluation.•Strength reduction factor can be reliably used for excavability classification.•Excavability classes are verified by measuring laboratory specific energy.

Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology
Authors
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