136220 ⎘
Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor; Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor Supports specially adapted for use in combination with the placing of filling-up materials
COAL-BASED SOLID WASTE TRANSPORT AND FILLING INTEGRATED MACHINE MINING SYSTEM AND METHOD
#2Method for recovering room-mining coal pillars by solid filling in synergy with artificial pillars
#3Mine roof support, pre-installation assembly for same, and method of installation
#4Method for designing supporting parameters of transition support for mixed mining face of filling and fully-mechanized mining
#5Equipment system for no-roadway no-coal-pillar retained roadway mining method
#6Method for removing hydraulic support for solid filling coal mining
#7Inclined layered solid-filling mining method in ultrathick coal layer