136076 ⎘
Working-face supports
Sub-classes:Method of recovering room-and-pillar coal pillar by using external replacement supports
#2Load support drum with resilient core member
#3Fractured roof 110 mining method entry-side anti-collapsed structure
#4Anti-spalling blocking bar for large cross-section coal gallery excavation work surface and supporting method
#5Equipment system for no-roadway no-coal-pillar retained roadway mining method
#6Underground mining system for reduced costs, improved efficiencies, higher productivity and a safer working environment through penetrated block extraction
#7Longwall face support in an underground mine
#8Telescopic mine roof support
#9Telescopic mine roof support