DEVICE FOR CREATION OF AIR GAPS AND ELIMINATION OF RE-DRILLING IN BLASTING WELLS Russian patent published in 2020 - IPC F42D1/08 F42D1/18 

FIELD: blasting operations.

SUBSTANCE: invention relates to devices for blasting operations and can be used in mining industry, as well as in other industries, where there is a need for blasting operations. Device for creation of air gaps and elimination of re-drilling in explosive wells includes a post, a washer, a support, an elastic bowl with lobes formed by slits extending to the bowl center, installed on the upper end of the rack, having diameter exceeding diameter of the well. Bowl is made round. Lobe lobes and bottom have stiffness ribs. Slots on lobes are made in direction from lug edge to bowl bottom. In the center the cup is equipped with a bushing for fixation on the support. Bowl bottom rests on washer fixed on post. Post can be made in the form of a rod or a hollow tube. Elastic bowl can be made of thin plastic or high- or low-pressure polyethylene.

EFFECT: invention increases reliability of the device and prevents its deformation in the well.

6 cl, 4 dwg