Study on Characteristics of Energy for Hard Roof Fracture in Island Workface

Abstract:

According to the characteristics of the island workface with hard roof, various mechanical models of hard roof in island workface are established, to analyze energy characteristics of hard roof before and after the first fracture in island workface with all round gobs, derived their simplified formulas of bending strain energy for hard roof before and after the first fracture, and using these formulas to estimate the bending strain energy for the typical case of coal bump, reveals the energy cause of coal bump and verify the validity of these formulas.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 694-697
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.694
• Online since: August 2013
• Authors: Xu Feng Pang, Ke Xue Zhang
• Keywords: Bending Strain Energy, Hard Roof, Island Workface, Thin Plate

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