The arrangement of roadway along the narrow coal pillar is different from the layout of the roadway with the wide coal pillar. Because of the limited size of the lateral coal and the support pressure of the adjacent goaf, the roadway along the goaf is in the lateral direction large-scale plastic failure zone, the inevitable bearing capacity of the surrounding rock in the roadway along the goaf was poor, with difficult support stability control. Aiming at this problem, combined with the engineering conditions of the narrow coal pillar roadway in the 908 return airway of Qipanjing Mine, the stress evolution law and bearing stability characteristics of the surrounding rock of the roadway along the narrow coal pillar were analyzed, and then the narrow coal pillar roadway of 908 return airway was proposed. The joint cooperative support scheme of anchor net + double metal net + anchor cable + single column was put forward, through the field practice showed the "surrounding rock - support" common bearing structure was stable, with remarkable control effect.
孟海东1,汤贵君1,2,卜庆为1. 棋盘井煤矿908回风巷窄煤柱巷道支护技术研究[J]. 煤炭与化工, 2019, 42(2): 21-24.
Meng Haidong1, Tang Guijun1,2, Bu Qingwei1. Study on narrow coal pillar along gob roadway in the 908 air return roadway of Qipanjing Mine. CCI, 2019, 42(2): 21-24.