BOREHOLE SEALING DEVICE Russian patent published in 1998 - IPC

FIELD: mining; applicable in closing of clearance between borehole wall and pipe used for injection of liquid to fissured rock mass. SUBSTANCE: borehole sealing device includes pipe with flexible hose fitted thereon and enclosed from outside on both ends with sleeves; check valves of pipe bore and on pipe under hose; disc and device for its pinching by ends made combined with check valve of pipe bore as a single member in the form of cap nut provided with hollow coaxial to thread and having through holes in wall. The holes are overlapped with tube made of flexible material. Use of device for pinching disc by ends and check valve of pipe bore made as a single member in the form of cap nut simplifies design of borehole sealing device. EFFECT: higher efficiency. 3 dwg