Aqueous medium spacer

Abstract

The invention discloses an aqueous medium spacer. The aqueous medium spacer comprises a spacer main body and a top cofferdam. The spacer main body is of a drum-shaped structure and comprises a circular top face, a circular bottom face and a side face arranged between the top face and the bottom face in a surrounding mode. A water filling nozzle is arranged on the top face, the top cofferdam is arranged on the connecting position of the top face and the side face of the spacer main body, and the top cofferdam is of a horn-shaped structure gradually expanding in the upward direction. The aqueous medium spacer has the advantages that the blasting pressure of the bottoms of blast holes is improved, and blasting vibration is reduced; the explosive load in the blast holes is reduced, and blasting unit consumption is reduced; an explosive loading structure is improved, and the explosive acting position is reasonably arranged; and waterproof spacing is achieved, and after spacing is conducted in the local water-poor blast holes, low-cost multi-hole granulous anfo explosives can be used. Compared with an air spacer, the aqueous medium spacer has the advantages that compressibility is small, the filled medium quantity is convenient to control, the influence under the climatic temperature condition is small, and the influence under the water depth pressure in the holes is small.

Description

technical field [0001] The invention relates to the field of mine spacer support protection, in particular to a water medium spacer. Background technique [0002] Open-pit mines often use blast hole spacers during blasting construction. The main purpose of using spacers is to improve the explosion pressure at the bottom of the blast hole and reduce blast vibration; reduce the amount of charge in the blast hole and reduce the unit consumption of blasting; improve the charge structure , rationally arrange the action position of the explosive; realize the waterproof interval, and use the low-cost porous granular ammonium oil explosive after the interval in the local water-poor blast hole. At present, large-scale open-pit mines are using a large number of blasthole spacers. The use of spacers in mines has been tested in production practice. It does improve blasting quality, reduce explosive unit consumption, water and waterproof, and shock absorption. At present, there are many...

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