EXPLOSION-PROOF JUMPER DEVICE Russian patent published in 2015 - IPC E21F5/00 E21F17/103 

FIELD: mining.

SUBSTANCE: invention relates to the construction of jumpers in the mining industry, and more particularly to a device of jumpers in the supply workings of waste scouring faces and in the workings at fire sites in gassy mines. The jumper in the working is set without kerving, mobile and with opening window, closed at the back side with the shield sheet, with reinforced frame on the shield and the openings in the frame to access the radial rods connecting the frame itself, and a tube part with openings on the tube, which enters the middle of the shield sheet and through which a metal rod passes, engaged with the transverse rope, fixed by the anchors in the side walls of the working. At that at the explosion the shock wave moves the no-cut jumper and the shield shutter in the window, that directs a part of the wave on the boards and roof of the working, and the main shock wave is received by the rear fence consisting of bags of flame retardant inert dust, a second barrier shield on the metal rod, separating the bulk materials, and a set of the thrust racks at the output.

EFFECT: increasing the stability of the jumper.

1 dwg