FIELD: mining.
SUBSTANCE: after installation of mining anchor with anchor bolt, in particular expandable friction tubular anchor with end cartridge in front, into previously drilled well, adapter is installed on cartridge with the possibility to supply and drain the liquid. On the one hand, using injection pipeline of excess pressure maintenance, excess pressure is developed, which fixes adapter on cartridge. On the other hand, fluid rushes along expansion pipeline into anchor bolt and starts filling it. At the same time anchor bolt, due to pressure rise, under action of excess pressure, expands in drill hole, so that its external surface presses its walls and therefore fixes mining anchor in drill hole. Due to the possibility to supply gas with the help of adapter, pressurised gas, for instance compressed air, may be supplied into anchor bolt prior to and/or after its expansion.
EFFECT: compressed gas is bled after removal of adapter and almost fully drains fluid available in anchor bolt.
16 cl, 4 dwg
