Affected by high ground stress,the surrounding rock of the transportation roadway in the 3410 working face of a certain coal mine is severely deformed and damaged.By analyzing the depth and mechanism of surrounding rock failure,a joint support scheme of"anchor rod+grouting anchor cable+metal mesh+sprayed concrete+grouting pipe is adopted".On site engineering practice has shown that the maximum deformation of the top,bottom,and two sides of the roadway is 120 mm and 115 mm,respectively,both within the safe range,the optimized support scheme can ensure the safe use of the roadway.
关键词
高地应力/松散破碎围岩/巷道/支护/注浆
Key words
high ground stress/loose and fractured surrounding rock/roadway/support/grouting
维普
万方数据