Numerical Simulation Study on Protective Range of Upper Protective Layer Mining

Xianzhan Chen

Abstract


During exploitation in first mined seam, how to accurately determine the protective range of stress releasing seam and further determine burst-free zone is problematic in preventing coal and gas outburst. For judgmental standard theory in burst-free zone in first mined seam, the protective range is determined on the basis of expansion deformation in stress releasing seams. the author bases on the project of 513C15 working face in Xieyi mine and determines its protective range by COMSOL Multiphysics simulating software.

Keywords


coal and gas outburst; stress relief seam; protective range; numerical simulation; gas content


DOI
10.12783/dteees/icseep2017/12726

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