[Purposes] This research is conducted to exploret the roof movement law of double roadway arrangement in thick coal seam and the abutment pressure distribution mechanism of surrounding rock. [Methods] The roof cuttings of single roadway in belt channeling and return air channeling in Gucheng N1302 face were taken as the engineering research objects to achieve effective pressure relief... https://www.spidertattooz.com/Kaiser-Copy-Stand-RS-1-with-RA-1-Arm-40-Counterbalanced-Column-and-18-x-20-Baseboard/