Multi-variable assessment of coal bump risk during extraction of an island longwall panel
Abstract：The field tests, which were conducted in an island longwall panel in the Tangshan Coal Mine in the city of Tangshan, China, are intended to provide researchers and mining engineers with the assessment of coal bump risk dur- ing extraction of an island longwall panel. In these tests, roadway roof displacement and electromagnetic radiation (EMR) of roadways in the panel were investigated to determine the zones of intensive roof deformation. The results of the field tests show that the roof deformation starts to occur at more than 30 m ahead of the longwall face and the de- formation starts to accelerate after a distance of 10 m in front of the long-wall face. Large and rapid roof deformation is considered to be an important precursor of coal bump occurrence during the extraction of an island longwall panel. It indicates that the bump-prone zones around island longwall panel and near the edge of the roadway during extraction is within 7.5 to 10. 0 m ahead of the mining face.
Keywords：island longwall panelcoal bumpmulti-variable assessmentcoal and rock masselectromagnetic radia- tions
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( 1790-1795 )