DOI: 10.11799/ce201611011
Composite support technology of soft coal roadway with large loose zone
GUO Jiang-tao
Abstract：In light of the coal roadway deformation and breakage in soft rock under dynamic pressure, the damage-failure of surrounding rock were detected based on coupled supporting principle and broken rock circle theory, and the failure mechanism of surrounding rock was obtained through numerical simulation and practical measurement. A composite support technology was designed, which mainly used passive-active combined support, supplemented by local coupled-strengthen support. The results show that loosen zone of the coal roadway sides is typical large loosen zone. Active support capacity can be substantially strengthened using deep anchor support with wide steel strips and self-bearing capacity of roadway surrounding rock can be improved with optimized coal pillar size, and multi-zone cascade bearing and overall strengthening can be realized with coupled-strengthen support deployed at key positions.
Keywords：large loosen zonesoft coal roadwaysurrounding rock controlcomposite support
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 35-37,41 )