| 摘要 |
FIELD: mining.SUBSTANCE: to the development passed with formation roof slashing, between extraction gates there transported are pneumatic chocks, which are laid into box-shaped coverings and covered with "?"-shaped supports, and at crossover of working face to the development crossed with working face, compressed air is supplied to pneumatic chocks, "?"-shaped supports are lifted, and after the working face crosses the development crossing the working face line, pneumatic chocks are unloaded, "?"-shaped supports are lowered to box-shaped covering, and pneumatic chocks are removed to extraction development.EFFECT: improving the erection efficiency of artificial roof in the development crossed over with a working face.3 dwg |
