DEVICE FOR FORMATION OF SHOTCRETE SUPPORT Russian patent published in 1997 - IPC

FIELD: mining; applicable in support of mine underground workings. SUBSTANCE: the offered device has manipulator in form of two telescopic posts 4 hinged to platform 2. Manipulator is provided with cylinder 5 having nozzles 6. Cylinder 5 has two parallel channels 7 and 8. Each nozzle 6 is connected with parallel channels 7 and 8 by means of holes 9 and 10 intersecting at acute angle. Cylinder 5 is brought with the help of manipulator to treated surface. Concrete mix through concrete-conveying pipeline is supplied to channel 7 of cylinder 5. To accelerate supply of hardening mix, air is supplied by air main line 12 to channel 8. Air is mixed with hardening mix in holes 9 and 10. Accelerated hardening mix through nozzles 6 by means of manipulator is applied to surface of working over its perimeter irrespective of its profile. Width of treated surface may be regulated by length of cylinder 5. EFFECT: higher efficiency of support of mine workings by shotcreting due to possibility of control of nozzle trajectory depending on profile of cross-section of working and increase of area of treated surface over length of working. 5 dwg