Mechanical characteristics of gas-filled coal under blasting load
Abstract：Applying the theory of cylindrical cavity expansion, the mechanical characteristics of gas-filled coal were studied. Expressions of stress distribution were expressed in cavity expansion zone, fractured zone, plastic zone and elastic zone. The mechanism of cracks evolution in coal was investigated based on theoretical expressions, numerical simulation and model experiment. The results show that the interaction of compression wave and unloading wave form cracks in gas-filled coal. The main energy of blasting is used to form fractured zone, so the coal have more lager area than rock under blasting loads.
Keywords：gasfilled coalmechanics of explosioncolumn chargecavity explosion
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 268-273 )