随着采矿技术的发展,我国煤矿开采逐步由浅入深,生产条件更加恶劣,危险系数也逐渐升高,尤其是软岩巷道,这些问题更加突出。采深越大,软岩越易破碎和位移,支护难度也越大。从软岩巷道的破碎机理入手,通过理论分析的方法,系统地阐述了破碎围岩的最佳支护时间、塑性变形区半径和极限自稳平衡拱的最大高度。 With the development of mining technology, China’s coal mining gradually from shallow to deep, more harsh production conditions, the risk factor is also gradually increased, especially soft rock roadway, these issues are more prominent. The larger the mining depth, the more susceptible to rock fragmentation and displacement, the greater the difficulty of support. Starting from the crushing mechanism of soft rock roadway, the optimal supporting time, the radius of plastic deformation zone and the maximum height of limit self-stabilizing arch are systematically expounded by theoretical analysis.