摘要
玉溪煤矿进风立井马头门岩石裂隙发育,断面大,服务年限长,顶板松动圈范围大,易掉顶,成形差,采用锚网索喷一次支护和双层钢筋混凝土结构二次支护的复合支护,实施效果良好可行,值得大面积推广。
Yuxi coal mine air shaft ingate rock fissures, large section, service life is long, loose circle of large roof, easy off the top, forming difference, uses the anchor rope first support and double layer reinforced concrete structure two supporting composite bracing, good effect can be done, worth area promotion.
出处
《内蒙古煤炭经济》
2012年第12期60-62,共3页
Inner Mongolia Coal Economy
关键词
大断面
锚网索喷
双层钢筋
混凝土
联合支护
large section
the anchor rope
double reinforced
concrete
combined support
