| 摘要 |
FIELD: mining. ^ SUBSTANCE: workings as per thickness of ore body pass at the block corners across body's course. Fans are drilled from them in hanging wall of ore body, parallel to ore body plane, for driving of slot raise. After slot raise breaking the broken ore is drawn through sublevels. Then winches with ropes are mounted in all workings made at corners. Ropes from upper horizon are lowered to level of lower block elevation, and active flexible covering is attached to them. Flexible covering consists of several rows of closed elastic covers connected by compressed air supply pipeline to compressor. Covering is drawn as the erection continues to the slot raise up to upper horizon. Covers are filled with air to working pressure. Flexible covering is stretched with ropes; after that, stopped excavation operations are performed. As the block reserves are being developed, ropes are tightened from time to time; after reserves are developed, air is discharged from covers by means of air pipeline and the covering is stretched to upper or lower horizon. ^ EFFECT: invention allows using the covering to control the ore drawing process and excluding the probability of the covering damage at blasting. ^ 2 cl, 6 dwg |
